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README.md
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README.md
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# ZAMlöten SMD-Challenge v1
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Dies sind die KiCad-Design-Dateien zum ersten ZAM-Lötwettbewerb.
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Die Schaltung ist ein elektronischer Würfel, umgesetzt mit Logik-ICs der 74er-Serie.
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Da die Schaltung von einer Knopfzelle versorgt wird, enthält sie zusätzlich einen Verpolschutz und eine automatische Abschaltung.
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Die Funktion ist wie folgt:
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* Beim Drücken des Tasters passieren drei Dinge:
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1. Der MOSFET zum Abschalten der gesamten Schaltung wird direkt geöffnet, was die Stromversorgung aktviert.
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2. Der Timer für die automatische Abschaltung wird gestartet, so dass die Schaltung für eine gewisse Zeit auch ohne gedrückten Taster an bleibt.
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3. Der Taktgenerator wird gestartet.
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* Nach dem Loslassen des Tasters entlädt sich ein Kondensator am Taktgenerator-VCO, was die Taktfrequenz immer weiter reduziert, bis dieser stehen bleibt.
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* Der Taktgenerator taktet einen 3-bit-Zähler. Der Zähler wird von einem Decoder auf einzelne Leitungen decodiert, von denen die Bits 0 bis 5 für die gewürfelte Zahl steht und das Bit 6 den Reset für den Zähler darstellt. Der Zähler zählt also effektiv von 0 bis 5.
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* Durch eine Diodenlogik werden die Bits so auf die 7 LEDs verteilt, dass die üblichen Würfelmuster entstehen.
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## Lizenz
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Dieses Projekt ist Open Hardware unter der CERN OHL-S Version 2.
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Abgeleitete Projekte müssen unter dieser oder wahlweise einer späteren Version der Lizenz verteilt werden.
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Das Urheberrecht liegt bei Thomas Kolb (cfr34k). Das Projekt wurde 2024 erstellt.
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(text "SPDX-FileCopyrightText: 2024 Thomas Kolb \"cfr34k\" <cfr34k-git@tkolb.de>\nSPDX-License-Identifier: CERN-OHL-S-2.0+\n\nYou may redistribute and modify this source and make products using it under\nthe terms of the CERN-OHL-S v2 (https://ohwr.org/cern_ohl_s_v2.txt) or any\nlater version.\n\nThis source is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY,\nINCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY AND FITNESS FOR A\nPARTICULAR PURPOSE. Please see the CERN-OHL-S v2 for applicable conditions.\n\nSource location: https://git.tkolb.de/ZAM/ZAMloeten_SMD_Challenge_v1\n"
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(in_bom yes)
|
(in_bom yes)
|
||||||
|
|
@ -8592,7 +8809,7 @@
|
||||||
(dnp no)
|
(dnp no)
|
||||||
(uuid "72fd369c-aba9-4af4-b4cc-5102c05a3854")
|
(uuid "72fd369c-aba9-4af4-b4cc-5102c05a3854")
|
||||||
(property "Reference" "D2"
|
(property "Reference" "D2"
|
||||||
(at 68.2625 228.6 0)
|
(at 64.4525 228.6 0)
|
||||||
(effects
|
(effects
|
||||||
(font
|
(font
|
||||||
(size 1.27 1.27)
|
(size 1.27 1.27)
|
||||||
|
|
@ -8600,7 +8817,7 @@
|
||||||
)
|
)
|
||||||
)
|
)
|
||||||
(property "Value" "RB510SM-30T2R"
|
(property "Value" "RB510SM-30T2R"
|
||||||
(at 68.2625 231.14 0)
|
(at 64.4525 231.14 0)
|
||||||
(effects
|
(effects
|
||||||
(font
|
(font
|
||||||
(size 1.27 1.27)
|
(size 1.27 1.27)
|
||||||
|
|
@ -8608,7 +8825,7 @@
|
||||||
)
|
)
|
||||||
)
|
)
|
||||||
(property "Footprint" "Diode_SMD:D_SOD-523"
|
(property "Footprint" "Diode_SMD:D_SOD-523"
|
||||||
(at 68.58 234.95 0)
|
(at 64.77 234.95 0)
|
||||||
(effects
|
(effects
|
||||||
(font
|
(font
|
||||||
(size 1.27 1.27)
|
(size 1.27 1.27)
|
||||||
|
|
@ -8617,7 +8834,7 @@
|
||||||
)
|
)
|
||||||
)
|
)
|
||||||
(property "Datasheet" "~"
|
(property "Datasheet" "~"
|
||||||
(at 68.58 234.95 0)
|
(at 64.77 234.95 0)
|
||||||
(effects
|
(effects
|
||||||
(font
|
(font
|
||||||
(size 1.27 1.27)
|
(size 1.27 1.27)
|
||||||
|
|
@ -8626,7 +8843,7 @@
|
||||||
)
|
)
|
||||||
)
|
)
|
||||||
(property "Description" "Schottky diode"
|
(property "Description" "Schottky diode"
|
||||||
(at 68.58 234.95 0)
|
(at 64.77 234.95 0)
|
||||||
(effects
|
(effects
|
||||||
(font
|
(font
|
||||||
(size 1.27 1.27)
|
(size 1.27 1.27)
|
||||||
|
|
@ -8635,7 +8852,7 @@
|
||||||
)
|
)
|
||||||
)
|
)
|
||||||
(property "Teilenummer" "RB510SM-30T2R"
|
(property "Teilenummer" "RB510SM-30T2R"
|
||||||
(at 68.58 234.95 0)
|
(at 64.77 234.95 0)
|
||||||
(effects
|
(effects
|
||||||
(font
|
(font
|
||||||
(size 1.27 1.27)
|
(size 1.27 1.27)
|
||||||
|
|
@ -10305,7 +10522,7 @@
|
||||||
)
|
)
|
||||||
(symbol
|
(symbol
|
||||||
(lib_id "power:GND")
|
(lib_id "power:GND")
|
||||||
(at 59.69 254 0)
|
(at 49.53 252.73 0)
|
||||||
(unit 1)
|
(unit 1)
|
||||||
(exclude_from_sim no)
|
(exclude_from_sim no)
|
||||||
(in_bom yes)
|
(in_bom yes)
|
||||||
|
|
@ -10314,7 +10531,7 @@
|
||||||
(fields_autoplaced yes)
|
(fields_autoplaced yes)
|
||||||
(uuid "c65f882a-4c3e-48b1-87cc-c3e7085e9676")
|
(uuid "c65f882a-4c3e-48b1-87cc-c3e7085e9676")
|
||||||
(property "Reference" "#PWR08"
|
(property "Reference" "#PWR08"
|
||||||
(at 59.69 260.35 0)
|
(at 49.53 259.08 0)
|
||||||
(effects
|
(effects
|
||||||
(font
|
(font
|
||||||
(size 1.27 1.27)
|
(size 1.27 1.27)
|
||||||
|
|
@ -10323,7 +10540,7 @@
|
||||||
)
|
)
|
||||||
)
|
)
|
||||||
(property "Value" "GND"
|
(property "Value" "GND"
|
||||||
(at 59.69 259.08 0)
|
(at 49.53 257.81 0)
|
||||||
(effects
|
(effects
|
||||||
(font
|
(font
|
||||||
(size 1.27 1.27)
|
(size 1.27 1.27)
|
||||||
|
|
@ -10331,7 +10548,7 @@
|
||||||
)
|
)
|
||||||
)
|
)
|
||||||
(property "Footprint" ""
|
(property "Footprint" ""
|
||||||
(at 59.69 254 0)
|
(at 49.53 252.73 0)
|
||||||
(effects
|
(effects
|
||||||
(font
|
(font
|
||||||
(size 1.27 1.27)
|
(size 1.27 1.27)
|
||||||
|
|
@ -10340,7 +10557,7 @@
|
||||||
)
|
)
|
||||||
)
|
)
|
||||||
(property "Datasheet" ""
|
(property "Datasheet" ""
|
||||||
(at 59.69 254 0)
|
(at 49.53 252.73 0)
|
||||||
(effects
|
(effects
|
||||||
(font
|
(font
|
||||||
(size 1.27 1.27)
|
(size 1.27 1.27)
|
||||||
|
|
@ -10349,7 +10566,7 @@
|
||||||
)
|
)
|
||||||
)
|
)
|
||||||
(property "Description" "Power symbol creates a global label with name \"GND\" , ground"
|
(property "Description" "Power symbol creates a global label with name \"GND\" , ground"
|
||||||
(at 59.69 254 0)
|
(at 49.53 252.73 0)
|
||||||
(effects
|
(effects
|
||||||
(font
|
(font
|
||||||
(size 1.27 1.27)
|
(size 1.27 1.27)
|
||||||
|
|
|
||||||
289
cern_ohl_s_v2.txt
Normal file
289
cern_ohl_s_v2.txt
Normal file
|
|
@ -0,0 +1,289 @@
|
||||||
|
CERN Open Hardware Licence Version 2 - Strongly Reciprocal
|
||||||
|
|
||||||
|
|
||||||
|
Preamble
|
||||||
|
|
||||||
|
CERN has developed this licence to promote collaboration among
|
||||||
|
hardware designers and to provide a legal tool which supports the
|
||||||
|
freedom to use, study, modify, share and distribute hardware designs
|
||||||
|
and products based on those designs. Version 2 of the CERN Open
|
||||||
|
Hardware Licence comes in three variants: CERN-OHL-P (permissive); and
|
||||||
|
two reciprocal licences: CERN-OHL-W (weakly reciprocal) and this
|
||||||
|
licence, CERN-OHL-S (strongly reciprocal).
|
||||||
|
|
||||||
|
The CERN-OHL-S is copyright CERN 2020. Anyone is welcome to use it, in
|
||||||
|
unmodified form only.
|
||||||
|
|
||||||
|
Use of this Licence does not imply any endorsement by CERN of any
|
||||||
|
Licensor or their designs nor does it imply any involvement by CERN in
|
||||||
|
their development.
|
||||||
|
|
||||||
|
|
||||||
|
1 Definitions
|
||||||
|
|
||||||
|
1.1 'Licence' means this CERN-OHL-S.
|
||||||
|
|
||||||
|
1.2 'Compatible Licence' means
|
||||||
|
|
||||||
|
a) any earlier version of the CERN Open Hardware licence, or
|
||||||
|
|
||||||
|
b) any version of the CERN-OHL-S, or
|
||||||
|
|
||||||
|
c) any licence which permits You to treat the Source to which
|
||||||
|
it applies as licensed under CERN-OHL-S provided that on
|
||||||
|
Conveyance of any such Source, or any associated Product You
|
||||||
|
treat the Source in question as being licensed under
|
||||||
|
CERN-OHL-S.
|
||||||
|
|
||||||
|
1.3 'Source' means information such as design materials or digital
|
||||||
|
code which can be applied to Make or test a Product or to
|
||||||
|
prepare a Product for use, Conveyance or sale, regardless of its
|
||||||
|
medium or how it is expressed. It may include Notices.
|
||||||
|
|
||||||
|
1.4 'Covered Source' means Source that is explicitly made available
|
||||||
|
under this Licence.
|
||||||
|
|
||||||
|
1.5 'Product' means any device, component, work or physical object,
|
||||||
|
whether in finished or intermediate form, arising from the use,
|
||||||
|
application or processing of Covered Source.
|
||||||
|
|
||||||
|
1.6 'Make' means to create or configure something, whether by
|
||||||
|
manufacture, assembly, compiling, loading or applying Covered
|
||||||
|
Source or another Product or otherwise.
|
||||||
|
|
||||||
|
1.7 'Available Component' means any part, sub-assembly, library or
|
||||||
|
code which:
|
||||||
|
|
||||||
|
a) is licensed to You as Complete Source under a Compatible
|
||||||
|
Licence; or
|
||||||
|
|
||||||
|
b) is available, at the time a Product or the Source containing
|
||||||
|
it is first Conveyed, to You and any other prospective
|
||||||
|
licensees
|
||||||
|
|
||||||
|
i) as a physical part with sufficient rights and
|
||||||
|
information (including any configuration and
|
||||||
|
programming files and information about its
|
||||||
|
characteristics and interfaces) to enable it either to
|
||||||
|
be Made itself, or to be sourced and used to Make the
|
||||||
|
Product; or
|
||||||
|
ii) as part of the normal distribution of a tool used to
|
||||||
|
design or Make the Product.
|
||||||
|
|
||||||
|
1.8 'Complete Source' means the set of all Source necessary to Make
|
||||||
|
a Product, in the preferred form for making modifications,
|
||||||
|
including necessary installation and interfacing information
|
||||||
|
both for the Product, and for any included Available Components.
|
||||||
|
If the format is proprietary, it must also be made available in
|
||||||
|
a format (if the proprietary tool can create it) which is
|
||||||
|
viewable with a tool available to potential licensees and
|
||||||
|
licensed under a licence approved by the Free Software
|
||||||
|
Foundation or the Open Source Initiative. Complete Source need
|
||||||
|
not include the Source of any Available Component, provided that
|
||||||
|
You include in the Complete Source sufficient information to
|
||||||
|
enable a recipient to Make or source and use the Available
|
||||||
|
Component to Make the Product.
|
||||||
|
|
||||||
|
1.9 'Source Location' means a location where a Licensor has placed
|
||||||
|
Covered Source, and which that Licensor reasonably believes will
|
||||||
|
remain easily accessible for at least three years for anyone to
|
||||||
|
obtain a digital copy.
|
||||||
|
|
||||||
|
1.10 'Notice' means copyright, acknowledgement and trademark notices,
|
||||||
|
Source Location references, modification notices (subsection
|
||||||
|
3.3(b)) and all notices that refer to this Licence and to the
|
||||||
|
disclaimer of warranties that are included in the Covered
|
||||||
|
Source.
|
||||||
|
|
||||||
|
1.11 'Licensee' or 'You' means any person exercising rights under
|
||||||
|
this Licence.
|
||||||
|
|
||||||
|
1.12 'Licensor' means a natural or legal person who creates or
|
||||||
|
modifies Covered Source. A person may be a Licensee and a
|
||||||
|
Licensor at the same time.
|
||||||
|
|
||||||
|
1.13 'Convey' means to communicate to the public or distribute.
|
||||||
|
|
||||||
|
|
||||||
|
2 Applicability
|
||||||
|
|
||||||
|
2.1 This Licence governs the use, copying, modification, Conveying
|
||||||
|
of Covered Source and Products, and the Making of Products. By
|
||||||
|
exercising any right granted under this Licence, You irrevocably
|
||||||
|
accept these terms and conditions.
|
||||||
|
|
||||||
|
2.2 This Licence is granted by the Licensor directly to You, and
|
||||||
|
shall apply worldwide and without limitation in time.
|
||||||
|
|
||||||
|
2.3 You shall not attempt to restrict by contract or otherwise the
|
||||||
|
rights granted under this Licence to other Licensees.
|
||||||
|
|
||||||
|
2.4 This Licence is not intended to restrict fair use, fair dealing,
|
||||||
|
or any other similar right.
|
||||||
|
|
||||||
|
|
||||||
|
3 Copying, Modifying and Conveying Covered Source
|
||||||
|
|
||||||
|
3.1 You may copy and Convey verbatim copies of Covered Source, in
|
||||||
|
any medium, provided You retain all Notices.
|
||||||
|
|
||||||
|
3.2 You may modify Covered Source, other than Notices, provided that
|
||||||
|
You irrevocably undertake to make that modified Covered Source
|
||||||
|
available from a Source Location should You Convey a Product in
|
||||||
|
circumstances where the recipient does not otherwise receive a
|
||||||
|
copy of the modified Covered Source. In each case subsection 3.3
|
||||||
|
shall apply.
|
||||||
|
|
||||||
|
You may only delete Notices if they are no longer applicable to
|
||||||
|
the corresponding Covered Source as modified by You and You may
|
||||||
|
add additional Notices applicable to Your modifications.
|
||||||
|
Including Covered Source in a larger work is modifying the
|
||||||
|
Covered Source, and the larger work becomes modified Covered
|
||||||
|
Source.
|
||||||
|
|
||||||
|
3.3 You may Convey modified Covered Source (with the effect that You
|
||||||
|
shall also become a Licensor) provided that You:
|
||||||
|
|
||||||
|
a) retain Notices as required in subsection 3.2;
|
||||||
|
|
||||||
|
b) add a Notice to the modified Covered Source stating that You
|
||||||
|
have modified it, with the date and brief description of how
|
||||||
|
You have modified it;
|
||||||
|
|
||||||
|
c) add a Source Location Notice for the modified Covered Source
|
||||||
|
if You Convey in circumstances where the recipient does not
|
||||||
|
otherwise receive a copy of the modified Covered Source; and
|
||||||
|
|
||||||
|
d) license the modified Covered Source under the terms and
|
||||||
|
conditions of this Licence (or, as set out in subsection
|
||||||
|
8.3, a later version, if permitted by the licence of the
|
||||||
|
original Covered Source). Such modified Covered Source must
|
||||||
|
be licensed as a whole, but excluding Available Components
|
||||||
|
contained in it, which remain licensed under their own
|
||||||
|
applicable licences.
|
||||||
|
|
||||||
|
|
||||||
|
4 Making and Conveying Products
|
||||||
|
|
||||||
|
You may Make Products, and/or Convey them, provided that You either
|
||||||
|
provide each recipient with a copy of the Complete Source or ensure
|
||||||
|
that each recipient is notified of the Source Location of the Complete
|
||||||
|
Source. That Complete Source is Covered Source, and You must
|
||||||
|
accordingly satisfy Your obligations set out in subsection 3.3. If
|
||||||
|
specified in a Notice, the Product must visibly and securely display
|
||||||
|
the Source Location on it or its packaging or documentation in the
|
||||||
|
manner specified in that Notice.
|
||||||
|
|
||||||
|
|
||||||
|
5 Research and Development
|
||||||
|
|
||||||
|
You may Convey Covered Source, modified Covered Source or Products to
|
||||||
|
a legal entity carrying out development, testing or quality assurance
|
||||||
|
work on Your behalf provided that the work is performed on terms which
|
||||||
|
prevent the entity from both using the Source or Products for its own
|
||||||
|
internal purposes and Conveying the Source or Products or any
|
||||||
|
modifications to them to any person other than You. Any modifications
|
||||||
|
made by the entity shall be deemed to be made by You pursuant to
|
||||||
|
subsection 3.2.
|
||||||
|
|
||||||
|
|
||||||
|
6 DISCLAIMER AND LIABILITY
|
||||||
|
|
||||||
|
6.1 DISCLAIMER OF WARRANTY -- The Covered Source and any Products
|
||||||
|
are provided 'as is' and any express or implied warranties,
|
||||||
|
including, but not limited to, implied warranties of
|
||||||
|
merchantability, of satisfactory quality, non-infringement of
|
||||||
|
third party rights, and fitness for a particular purpose or use
|
||||||
|
are disclaimed in respect of any Source or Product to the
|
||||||
|
maximum extent permitted by law. The Licensor makes no
|
||||||
|
representation that any Source or Product does not or will not
|
||||||
|
infringe any patent, copyright, trade secret or other
|
||||||
|
proprietary right. The entire risk as to the use, quality, and
|
||||||
|
performance of any Source or Product shall be with You and not
|
||||||
|
the Licensor. This disclaimer of warranty is an essential part
|
||||||
|
of this Licence and a condition for the grant of any rights
|
||||||
|
granted under this Licence.
|
||||||
|
|
||||||
|
6.2 EXCLUSION AND LIMITATION OF LIABILITY -- The Licensor shall, to
|
||||||
|
the maximum extent permitted by law, have no liability for
|
||||||
|
direct, indirect, special, incidental, consequential, exemplary,
|
||||||
|
punitive or other damages of any character including, without
|
||||||
|
limitation, procurement of substitute goods or services, loss of
|
||||||
|
use, data or profits, or business interruption, however caused
|
||||||
|
and on any theory of contract, warranty, tort (including
|
||||||
|
negligence), product liability or otherwise, arising in any way
|
||||||
|
in relation to the Covered Source, modified Covered Source
|
||||||
|
and/or the Making or Conveyance of a Product, even if advised of
|
||||||
|
the possibility of such damages, and You shall hold the
|
||||||
|
Licensor(s) free and harmless from any liability, costs,
|
||||||
|
damages, fees and expenses, including claims by third parties,
|
||||||
|
in relation to such use.
|
||||||
|
|
||||||
|
|
||||||
|
7 Patents
|
||||||
|
|
||||||
|
7.1 Subject to the terms and conditions of this Licence, each
|
||||||
|
Licensor hereby grants to You a perpetual, worldwide,
|
||||||
|
non-exclusive, no-charge, royalty-free, irrevocable (except as
|
||||||
|
stated in subsections 7.2 and 8.4) patent licence to Make, have
|
||||||
|
Made, use, offer to sell, sell, import, and otherwise transfer
|
||||||
|
the Covered Source and Products, where such licence applies only
|
||||||
|
to those patent claims licensable by such Licensor that are
|
||||||
|
necessarily infringed by exercising rights under the Covered
|
||||||
|
Source as Conveyed by that Licensor.
|
||||||
|
|
||||||
|
7.2 If You institute patent litigation against any entity (including
|
||||||
|
a cross-claim or counterclaim in a lawsuit) alleging that the
|
||||||
|
Covered Source or a Product constitutes direct or contributory
|
||||||
|
patent infringement, or You seek any declaration that a patent
|
||||||
|
licensed to You under this Licence is invalid or unenforceable
|
||||||
|
then any rights granted to You under this Licence shall
|
||||||
|
terminate as of the date such process is initiated.
|
||||||
|
|
||||||
|
|
||||||
|
8 General
|
||||||
|
|
||||||
|
8.1 If any provisions of this Licence are or subsequently become
|
||||||
|
invalid or unenforceable for any reason, the remaining
|
||||||
|
provisions shall remain effective.
|
||||||
|
|
||||||
|
8.2 You shall not use any of the name (including acronyms and
|
||||||
|
abbreviations), image, or logo by which the Licensor or CERN is
|
||||||
|
known, except where needed to comply with section 3, or where
|
||||||
|
the use is otherwise allowed by law. Any such permitted use
|
||||||
|
shall be factual and shall not be made so as to suggest any kind
|
||||||
|
of endorsement or implication of involvement by the Licensor or
|
||||||
|
its personnel.
|
||||||
|
|
||||||
|
8.3 CERN may publish updated versions and variants of this Licence
|
||||||
|
which it considers to be in the spirit of this version, but may
|
||||||
|
differ in detail to address new problems or concerns. New
|
||||||
|
versions will be published with a unique version number and a
|
||||||
|
variant identifier specifying the variant. If the Licensor has
|
||||||
|
specified that a given variant applies to the Covered Source
|
||||||
|
without specifying a version, You may treat that Covered Source
|
||||||
|
as being released under any version of the CERN-OHL with that
|
||||||
|
variant. If no variant is specified, the Covered Source shall be
|
||||||
|
treated as being released under CERN-OHL-S. The Licensor may
|
||||||
|
also specify that the Covered Source is subject to a specific
|
||||||
|
version of the CERN-OHL or any later version in which case You
|
||||||
|
may apply this or any later version of CERN-OHL with the same
|
||||||
|
variant identifier published by CERN.
|
||||||
|
|
||||||
|
8.4 This Licence shall terminate with immediate effect if You fail
|
||||||
|
to comply with any of its terms and conditions.
|
||||||
|
|
||||||
|
8.5 However, if You cease all breaches of this Licence, then Your
|
||||||
|
Licence from any Licensor is reinstated unless such Licensor has
|
||||||
|
terminated this Licence by giving You, while You remain in
|
||||||
|
breach, a notice specifying the breach and requiring You to cure
|
||||||
|
it within 30 days, and You have failed to come into compliance
|
||||||
|
in all material respects by the end of the 30 day period. Should
|
||||||
|
You repeat the breach after receipt of a cure notice and
|
||||||
|
subsequent reinstatement, this Licence will terminate
|
||||||
|
immediately and permanently. Section 6 shall continue to apply
|
||||||
|
after any termination.
|
||||||
|
|
||||||
|
8.6 This Licence shall not be enforceable except by a Licensor
|
||||||
|
acting as such, and third party beneficiary rights are
|
||||||
|
specifically excluded.
|
||||||
281
cern_ohl_s_v2_user_guide.txt
Normal file
281
cern_ohl_s_v2_user_guide.txt
Normal file
|
|
@ -0,0 +1,281 @@
|
||||||
|
CERN Open Hardware Licence Version 2 - Strongly Reciprocal
|
||||||
|
|
||||||
|
User Guide
|
||||||
|
|
||||||
|
September 2, 2020
|
||||||
|
Guide version: 1.0
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
1 Introduction
|
||||||
|
|
||||||
|
This document contains guidelines on how to apply the CERN-OHL-S v2 to a given
|
||||||
|
hardware design, and on the use of hardware designs licensed under CERN-OHL-S
|
||||||
|
v2. This means we will be talking to you sometimes as a licensor, and other
|
||||||
|
times as a licensee.
|
||||||
|
As a licensor, there are many ways in which you can make it clear to your
|
||||||
|
licensees that you are sharing your designs under the licence. These guidelines
|
||||||
|
are only to be taken as advice, illustrating some ways in which we think this
|
||||||
|
can be done efficiently.
|
||||||
|
To help you distinguish between requirements imposed by the licence (mostly as a
|
||||||
|
licensee) and our suggestions to you (mostly as a licensor), we will use the
|
||||||
|
word 'rule' for the former and the word 'suggestion' for the latter. Any
|
||||||
|
perceived contradiction between these guidelines and the licence text should of
|
||||||
|
course be resolved in favour of the licence text.
|
||||||
|
|
||||||
|
|
||||||
|
2 How to apply CERN-OHL-S v2 to a hardware design
|
||||||
|
|
||||||
|
2.1 Pre-requisite
|
||||||
|
|
||||||
|
Authorship/ownership of the design must be clear and undisputed. Only the legal
|
||||||
|
owner of the rights in the hardware design may decide under what conditions to
|
||||||
|
make it available. Generally, if ownership is vested in more than one
|
||||||
|
person/entity, there must be an agreement among the owners (or a chain of
|
||||||
|
compatible licences from each of them) to release the hardware design as open
|
||||||
|
hardware, and under the CERN-OHL-S v2 in particular.
|
||||||
|
|
||||||
|
2.2 Your sources
|
||||||
|
|
||||||
|
Nowadays, most designers who intend to share their work do so by hosting their
|
||||||
|
design files (sources) in a publicly-accessible repository using version control
|
||||||
|
systems such as git. The sites hosting these repositories usually provide users
|
||||||
|
with the convenience of downloading a whole repository as a compressed (e.g.
|
||||||
|
zip) file. Using these platforms is a very effective way of working: it makes it
|
||||||
|
easier for you to receive feedback, shows your users the complete history of the
|
||||||
|
project and allows them to easily start using it and contributing improvements.
|
||||||
|
|
||||||
|
2.2.1 Suggestion: try to host your design in a publicly-accessible repository
|
||||||
|
using version control. If that is not possible, compress your whole
|
||||||
|
directory structure into one file and publish that file, so users get your
|
||||||
|
whole project in one go.
|
||||||
|
|
||||||
|
If your goal is to share, it makes sense to provide enough information to users
|
||||||
|
about the contents of the design package they download, and to make it easy for
|
||||||
|
them to browse that information. For example, if you have designed your hardware
|
||||||
|
using proprietary tools, people who download the design files may not have
|
||||||
|
access to the tools you used. Sometimes you can also provide exported versions
|
||||||
|
of those files which, although not as useful for modification as the originals,
|
||||||
|
will make life easier for people who want to understand your designs. For
|
||||||
|
example, PCB schematics and layout can be exported as pdf files, and 3D
|
||||||
|
mechanical designs can be exported to the STEP format.
|
||||||
|
|
||||||
|
2.2.2 Suggestion: include in your design sources versions of the files exported
|
||||||
|
to formats everybody can read. It would be helpful to specify the tools
|
||||||
|
you used, and, if they are publicly available under free and open source
|
||||||
|
licences, provide information about where the recipient can find them.
|
||||||
|
|
||||||
|
It can also be good to let people know that you are following this guide, so
|
||||||
|
they see why you are doing things in this or that way.
|
||||||
|
|
||||||
|
2.2.3 Suggestion: include a copy of this user guide, in pdf or plain text
|
||||||
|
format, in your sources.
|
||||||
|
|
||||||
|
Of course, although not strictly necessary, you should also include a copy of
|
||||||
|
the licence text (CERN-OHL-S v2 in this case) in pdf or plain text form. Your
|
||||||
|
design files will anyway be identified as licensed under that licence, with a
|
||||||
|
URL pointing to the licence text, but it does not hurt to include the licence
|
||||||
|
text in the source package for the convenience of the user and to make it very
|
||||||
|
visible that the whole design is open source.
|
||||||
|
|
||||||
|
2.2.4 Suggestion: include a copy of the CERN-OHL-S v2 licence text, in pdf or
|
||||||
|
plain text format, in your sources, and failing that, provide a link to
|
||||||
|
the licence at https://ohwr.org/cern_ohl_s_v2.txt.
|
||||||
|
|
||||||
|
One of the requirements for licensees who make modifications to the design and
|
||||||
|
publish those modifications is to make them explicit in a dedicated text file.
|
||||||
|
As a licensor, you can make this obligation more easy for licensees to see and
|
||||||
|
bear in mind by including a placeholder file called CHANGES.txt in your sources.
|
||||||
|
|
||||||
|
2.2.5 Suggestion: include an empty CHANGES.txt file in your sources. You may
|
||||||
|
write a few lines in the beginning of the file stating that anyone
|
||||||
|
modifying the design should provide brief information about the
|
||||||
|
modifications, including the date they were made, and stating that
|
||||||
|
information about the design should be added but never removed from that
|
||||||
|
file. It could also state that, according to section 3.3.b of the licence,
|
||||||
|
licensees should provide a brief entry with a date and the nature of the
|
||||||
|
modification for each design change. For example '26 April 2020: AC/DC
|
||||||
|
power converter circuit removed as AC input no longer necessary'.
|
||||||
|
|
||||||
|
Now, as you have seen, as the initial licensor, relatively few rules apply to
|
||||||
|
you. We are going to assume that it is your intent to license your design under
|
||||||
|
CERN-OHL-S v2 though, and in that sense the minimal requirements are going to be
|
||||||
|
described as 'rules' below. Some files can easily include a header or a text box
|
||||||
|
with copyright and licensing information which will be easily visible to whoever
|
||||||
|
opens them. For file types which do not easily grant that possibility, consider
|
||||||
|
using a separate text file taking as its name the name of the original file with
|
||||||
|
'.license' appended to it. So if you have e.g. a file called
|
||||||
|
`my_3d_design.FCStd', you can add another file in the same directory called
|
||||||
|
`my_3d_design.FCStd.license' which is a text file containing copyright and
|
||||||
|
licensing information. If the number of files in your project is large and the
|
||||||
|
'.license' method is deemed too cumbersome, you can centralise all your
|
||||||
|
licensing information in a single text file following the Debian DEP5
|
||||||
|
specification. Both the '.license' and the DEP5 methods are suggested in the
|
||||||
|
REUSE guidelines. See https://reuse.software/for details.
|
||||||
|
|
||||||
|
2.2.6 Rule: include for each source file, either embedded in the file itself or
|
||||||
|
in a separate text file which refers to it:
|
||||||
|
(a) a copyright notice reflecting actual ownership;
|
||||||
|
(b) a notice that the hardware design source is licensed under the CERN-
|
||||||
|
OHL-S v2, possibly with a link to https://ohwr.org/cern_ohl_s_v2.txt:
|
||||||
|
i."Licensed under CERN-OHL-S v2 or any later version" or
|
||||||
|
ii."Licensed under CERN-OHL-S v2";
|
||||||
|
(c) a disclaimer of warranties;
|
||||||
|
(d) a Source Location if you wish to specify one;
|
||||||
|
(e) optionally, a Notice specifying that you wish the Source Location to
|
||||||
|
remain visible on the Product (or its packaging, or in its
|
||||||
|
documentation) even after modifications.
|
||||||
|
|
||||||
|
Here is an example for a hypothetical designer called Sam Smith hosting a
|
||||||
|
design called Gizmo at https://example_url:
|
||||||
|
|
||||||
|
------------------------------------------------------------------------------
|
||||||
|
| Copyright Sam Smith 2020. |
|
||||||
|
| |
|
||||||
|
| This source describes Open Hardware and is licensed under the CERN-OHL-S v2. |
|
||||||
|
| |
|
||||||
|
| You may redistribute and modify this source and make products using it under |
|
||||||
|
| the terms of the CERN-OHL-S v2 (https://ohwr.org/cern_ohl_s_v2.txt). |
|
||||||
|
| |
|
||||||
|
| This source is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, |
|
||||||
|
| INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY AND FITNESS FOR A |
|
||||||
|
| PARTICULAR PURPOSE. Please see the CERN-OHL-S v2 for applicable conditions. |
|
||||||
|
| |
|
||||||
|
| Source location: https://example_url |
|
||||||
|
| |
|
||||||
|
| As per CERN-OHL-S v2 section 4, should You produce hardware based on this |
|
||||||
|
| source, You must where practicable maintain the Source Location visible |
|
||||||
|
| on the external case of the Gizmo or other products you make using this |
|
||||||
|
| source. |
|
||||||
|
------------------------------------------------------------------------------
|
||||||
|
|
||||||
|
The first three lines in the example above, containing copyright and licence
|
||||||
|
type, can be substituted by a valid SPDX header, like this:
|
||||||
|
|
||||||
|
SPDX-FileCopyrightText: 2020 Sam Smith <sam@example.com>
|
||||||
|
SPDX-License-Identifier: CERN-OHL-S-2.0
|
||||||
|
|
||||||
|
or, in case the 'or any later version' option is preferred:
|
||||||
|
|
||||||
|
SPDX-FileCopyrightText: 2020 Sam Smith <sam@example.com>
|
||||||
|
SPDX-License-Identifier: CERN-OHL-S-2.0+
|
||||||
|
|
||||||
|
2.2.7 Suggestion: use standard SPDX headers whenever possible so that your
|
||||||
|
choice of licence is easy to understand by humans and computers alike.
|
||||||
|
|
||||||
|
Why would you license your design under 'CERN-OHL-S v2 or any later version'?
|
||||||
|
Imagine we discovered a shortcoming of the licence which made us write a new
|
||||||
|
version, let's say version 3.0, to fix it. Let us further imagine that we
|
||||||
|
decided to make v3 incompatible with v2 (this actually happened with the GPL).
|
||||||
|
If you licensed your design under 'v2 only' that means it could not be combined
|
||||||
|
with new designs licensed under v3. If, on the other hand, you license your
|
||||||
|
design under 'v2 or any later version', you give future licensees the option of
|
||||||
|
interpreting the design as licensed under the hypothetical v3, and there would
|
||||||
|
be no compatibility issues. This is quite an important decision to take when you
|
||||||
|
use a reciprocal licence, so we thought we'd mention it in this guide. You have
|
||||||
|
to make your own judgment as to whether you believe that CERN can be trusted to
|
||||||
|
ensure that future versions of the CERN-OHL will be similar in spirit and effect
|
||||||
|
to this version.
|
||||||
|
|
||||||
|
2.2.8 Suggestion: give some thought to the 'or any later version' option before
|
||||||
|
publishing your design under CERN-OHL-S v2.
|
||||||
|
|
||||||
|
We are going to assume that you, as a licensor, want people who receive a
|
||||||
|
product based on your design to know that it is Open Hardware and where they can
|
||||||
|
find the design files for that product, hence:
|
||||||
|
|
||||||
|
2.2.9 Rule: include in a part of the Source corresponding to a visible part of
|
||||||
|
the Product (e.g. silkscreen or top copper for a printed circuit board):
|
||||||
|
(a) the licence notice: "Licensed under CERN-OHL-S v2";
|
||||||
|
(b) the Source Location.
|
||||||
|
|
||||||
|
2.2.10 Suggestion: You can optionally include a copyright notice to be printed
|
||||||
|
on the Product (remember you must keep intact any Notices in the source,
|
||||||
|
though). If you do, and your design includes part of other designs, you
|
||||||
|
should at least acknowledge the work is not all your own by using e.g.
|
||||||
|
Copyright Sam Smith and others. In any case, do not include the CERN
|
||||||
|
logo.
|
||||||
|
|
||||||
|
2.3 A Note on Components
|
||||||
|
|
||||||
|
If your design is modular, consider licensing each of the components you have
|
||||||
|
designed separately, and then having an overarching design, also licensed under
|
||||||
|
an appropriate variant of CERN-OHL which contains each of the sub-components as
|
||||||
|
an Available Component. This will make life easier for licensees who only want
|
||||||
|
to make use of one component of your design.
|
||||||
|
|
||||||
|
|
||||||
|
3 How to deal with hardware designs licensed under CERN-OHL-S v2
|
||||||
|
|
||||||
|
Generally speaking, you must comply with the requirements applying to a
|
||||||
|
particular design detailed in the accompanying licence. If you receive hardware
|
||||||
|
designs licensed under the CERN-OHL-S v2, the requirements are to:
|
||||||
|
|
||||||
|
3.1 Rule: keep intact all the copyright, acknowledgement and trademark notices
|
||||||
|
and Source Location notices that are on the hardware design sources.
|
||||||
|
|
||||||
|
3.2 Rule: keep intact the references to the CERN-OHL-S v2.
|
||||||
|
|
||||||
|
3.3 Rule: keep intact the disclaimer of warranties.
|
||||||
|
|
||||||
|
|
||||||
|
3.1 Design modifications and publication
|
||||||
|
|
||||||
|
If you modify a hardware design licensed by someone else under CERN-OHL-S v2,
|
||||||
|
and you want to publish your modified design, or you need to publish it e.g. as
|
||||||
|
a result of the obligations attached to the production and distribution of
|
||||||
|
products, you must:
|
||||||
|
|
||||||
|
3.1.1 Rule: keep intact all the notices referred to above, although you may
|
||||||
|
remove notices that are no longer relevant to your design (for example, if
|
||||||
|
the design you are using contains a power supply and a processor board,
|
||||||
|
and you are only using the processor board in your own design, you can
|
||||||
|
remove the notices relating to the power supply, so long as you are sure
|
||||||
|
they only relate to the power supply).
|
||||||
|
|
||||||
|
3.1.2 Rule: include notices stating that you have modified the hardware de-
|
||||||
|
signs, giving a date and information about the modifications you have made
|
||||||
|
(e.g. in a CHANGES.txt file).
|
||||||
|
|
||||||
|
3.1.3 Rule: add the appropriate copyright notice and Source Location to the
|
||||||
|
modifications that were made.
|
||||||
|
|
||||||
|
3.1.4 Rule: license the modifications under the 'CERN-OHL-S v2' (or 'CERN- OHL-S
|
||||||
|
v2 or any later version' if permitted by the original licensor, and all
|
||||||
|
other components of the design allow you to license with the 'or any later
|
||||||
|
version' option).
|
||||||
|
|
||||||
|
3.1.5 Rule: if your design is a modification of someone else's design, or
|
||||||
|
incorporates parts of another's design, and in each case the other's
|
||||||
|
design is released under CERN-OHL, CERN-OHL-W or CERN-OHL-S you must (if
|
||||||
|
your tools allow this) include in your design sources versions of the
|
||||||
|
files exported to formats everybody can read using tools available under a
|
||||||
|
free or open source software licence. By CERN-OHL we mean any of the
|
||||||
|
earlier versions of the licence, prior to v2.
|
||||||
|
|
||||||
|
|
||||||
|
3.2 Hardware production and distribution
|
||||||
|
|
||||||
|
If, as a licensee, you want to produce hardware based on a design licensed under
|
||||||
|
CERN-OHL-S v2 and/or distribute that hardware, you need to:
|
||||||
|
|
||||||
|
3.2.1 Rule: either provide each recipient with a copy of the Complete Source or
|
||||||
|
ensure that each recipient is notified of the Source Location of the
|
||||||
|
Complete Source.
|
||||||
|
|
||||||
|
By Complete Source, we mean all files needed to make the hardware. Please see
|
||||||
|
the licence text for details. You also need to respect, if applicable, the
|
||||||
|
will expressed by the licensor to have a clear visual indication of the Source
|
||||||
|
Location on the hardware:
|
||||||
|
|
||||||
|
3.2.2 Rule: if specified in a Notice by the licensor, the Product must visibly
|
||||||
|
and securely display the Source Location on it or its packaging or
|
||||||
|
documentation in the manner specified in that Notice.
|
||||||
|
|
||||||
|
|
||||||
|
4 Asking for help
|
||||||
|
|
||||||
|
If there is something unclear in this guide, or you have any question on how to
|
||||||
|
apply the licence, the best place to ask is the CERN OHL forum at
|
||||||
|
https://forums.ohwr.org/c/cernohl. You may also find useful information in the
|
||||||
|
FAQs at https://www.ohwr.org/project/cernohl/wikis/faq.
|
||||||
Loading…
Reference in a new issue