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Initial commit: Rev. A complete

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Thomas Kolb 2023-08-29 22:56:29 +02:00
commit 81dd0451e4
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9
.gitignore vendored Normal file
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fp-info-cache
fp-lib-table
gerber/
bom/
*-backups/
*.kicad_sch-bak
*.xml
~*.lck

10553
TinyFanControl.kicad_pcb Normal file
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77
TinyFanControl.kicad_prl Normal file
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{
"board": {
"active_layer": 37,
"active_layer_preset": "",
"auto_track_width": true,
"hidden_netclasses": [],
"hidden_nets": [],
"high_contrast_mode": 0,
"net_color_mode": 1,
"opacity": {
"images": 0.6,
"pads": 1.0,
"tracks": 1.0,
"vias": 1.0,
"zones": 0.6
},
"selection_filter": {
"dimensions": false,
"footprints": false,
"graphics": false,
"keepouts": false,
"lockedItems": false,
"otherItems": false,
"pads": true,
"text": true,
"tracks": true,
"vias": false,
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"visible_layers": "0001030_ffffffff",
"zone_display_mode": 0
},
"meta": {
"filename": "TinyFanControl.kicad_prl",
"version": 3
},
"project": {
"files": []
}
}

514
TinyFanControl.kicad_pro Normal file
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{
"board": {
"3dviewports": [],
"design_settings": {
"defaults": {
"board_outline_line_width": 0.09999999999999999,
"copper_line_width": 0.19999999999999998,
"copper_text_italic": false,
"copper_text_size_h": 1.5,
"copper_text_size_v": 1.5,
"copper_text_thickness": 0.3,
"copper_text_upright": false,
"courtyard_line_width": 0.049999999999999996,
"dimension_precision": 4,
"dimension_units": 3,
"dimensions": {
"arrow_length": 1270000,
"extension_offset": 500000,
"keep_text_aligned": true,
"suppress_zeroes": false,
"text_position": 0,
"units_format": 1
},
"fab_line_width": 0.09999999999999999,
"fab_text_italic": false,
"fab_text_size_h": 1.0,
"fab_text_size_v": 1.0,
"fab_text_thickness": 0.15,
"fab_text_upright": false,
"other_line_width": 0.15,
"other_text_italic": false,
"other_text_size_h": 1.0,
"other_text_size_v": 1.0,
"other_text_thickness": 0.15,
"other_text_upright": false,
"pads": {
"drill": 0.0,
"height": 1.45,
"width": 1.0
},
"silk_line_width": 0.15,
"silk_text_italic": false,
"silk_text_size_h": 0.7999999999999999,
"silk_text_size_v": 0.7999999999999999,
"silk_text_thickness": 0.15,
"silk_text_upright": false,
"zones": {
"min_clearance": 0.25
}
},
"diff_pair_dimensions": [
{
"gap": 0.0,
"via_gap": 0.0,
"width": 0.0
}
],
"drc_exclusions": [],
"meta": {
"version": 2
},
"rule_severities": {
"annular_width": "error",
"clearance": "error",
"connection_width": "warning",
"copper_edge_clearance": "error",
"copper_sliver": "warning",
"courtyards_overlap": "error",
"diff_pair_gap_out_of_range": "error",
"diff_pair_uncoupled_length_too_long": "error",
"drill_out_of_range": "error",
"duplicate_footprints": "warning",
"extra_footprint": "warning",
"footprint": "error",
"footprint_type_mismatch": "ignore",
"hole_clearance": "error",
"hole_near_hole": "error",
"invalid_outline": "error",
"isolated_copper": "warning",
"item_on_disabled_layer": "error",
"items_not_allowed": "error",
"length_out_of_range": "error",
"lib_footprint_issues": "warning",
"lib_footprint_mismatch": "warning",
"malformed_courtyard": "error",
"microvia_drill_out_of_range": "error",
"missing_courtyard": "ignore",
"missing_footprint": "warning",
"net_conflict": "warning",
"npth_inside_courtyard": "ignore",
"padstack": "warning",
"pth_inside_courtyard": "ignore",
"shorting_items": "error",
"silk_edge_clearance": "warning",
"silk_over_copper": "warning",
"silk_overlap": "warning",
"skew_out_of_range": "error",
"solder_mask_bridge": "error",
"starved_thermal": "error",
"text_height": "warning",
"text_thickness": "warning",
"through_hole_pad_without_hole": "error",
"too_many_vias": "error",
"track_dangling": "warning",
"track_width": "error",
"tracks_crossing": "error",
"unconnected_items": "error",
"unresolved_variable": "error",
"via_dangling": "warning",
"zones_intersect": "error"
},
"rules": {
"max_error": 0.005,
"min_clearance": 0.15,
"min_connection": 0.15,
"min_copper_edge_clearance": 0.0,
"min_hole_clearance": 0.25,
"min_hole_to_hole": 0.3,
"min_microvia_diameter": 0.19999999999999998,
"min_microvia_drill": 0.09999999999999999,
"min_resolved_spokes": 2,
"min_silk_clearance": 0.0,
"min_text_height": 0.7999999999999999,
"min_text_thickness": 0.08,
"min_through_hole_diameter": 0.3,
"min_track_width": 0.19999999999999998,
"min_via_annular_width": 0.19999999999999998,
"min_via_diameter": 0.6,
"solder_mask_clearance": 0.0,
"solder_mask_min_width": 0.0,
"solder_mask_to_copper_clearance": 0.0,
"use_height_for_length_calcs": true
},
"teardrop_options": [
{
"td_allow_use_two_tracks": true,
"td_curve_segcount": 5,
"td_on_pad_in_zone": false,
"td_onpadsmd": true,
"td_onroundshapesonly": false,
"td_ontrackend": false,
"td_onviapad": true
}
],
"teardrop_parameters": [
{
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"td_height_ratio": 1.0,
"td_length_ratio": 0.5,
"td_maxheight": 2.0,
"td_maxlen": 1.0,
"td_target_name": "td_round_shape",
"td_width_to_size_filter_ratio": 0.9
},
{
"td_curve_segcount": 0,
"td_height_ratio": 1.0,
"td_length_ratio": 0.5,
"td_maxheight": 2.0,
"td_maxlen": 1.0,
"td_target_name": "td_rect_shape",
"td_width_to_size_filter_ratio": 0.9
},
{
"td_curve_segcount": 0,
"td_height_ratio": 1.0,
"td_length_ratio": 0.5,
"td_maxheight": 2.0,
"td_maxlen": 1.0,
"td_target_name": "td_track_end",
"td_width_to_size_filter_ratio": 0.9
}
],
"track_widths": [
0.0,
0.3
],
"via_dimensions": [
{
"diameter": 0.0,
"drill": 0.0
}
],
"zones_allow_external_fillets": false
},
"layer_presets": [],
"viewports": []
},
"boards": [],
"cvpcb": {
"equivalence_files": []
},
"erc": {
"erc_exclusions": [],
"meta": {
"version": 0
},
"pin_map": [
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"rule_severities": {
"bus_definition_conflict": "error",
"bus_entry_needed": "error",
"bus_to_bus_conflict": "error",
"bus_to_net_conflict": "error",
"conflicting_netclasses": "error",
"different_unit_footprint": "error",
"different_unit_net": "error",
"duplicate_reference": "error",
"duplicate_sheet_names": "error",
"endpoint_off_grid": "warning",
"extra_units": "error",
"global_label_dangling": "warning",
"hier_label_mismatch": "error",
"label_dangling": "error",
"lib_symbol_issues": "warning",
"missing_bidi_pin": "warning",
"missing_input_pin": "warning",
"missing_power_pin": "error",
"missing_unit": "warning",
"multiple_net_names": "warning",
"net_not_bus_member": "warning",
"no_connect_connected": "warning",
"no_connect_dangling": "warning",
"pin_not_connected": "error",
"pin_not_driven": "error",
"pin_to_pin": "error",
"power_pin_not_driven": "error",
"similar_labels": "warning",
"simulation_model_issue": "ignore",
"unannotated": "error",
"unit_value_mismatch": "error",
"unresolved_variable": "error",
"wire_dangling": "error"
}
},
"libraries": {
"pinned_footprint_libs": [],
"pinned_symbol_libs": []
},
"meta": {
"filename": "TinyFanControl.kicad_pro",
"version": 1
},
"net_settings": {
"classes": [
{
"bus_width": 12,
"clearance": 0.2,
"diff_pair_gap": 0.25,
"diff_pair_via_gap": 0.25,
"diff_pair_width": 0.2,
"line_style": 0,
"microvia_diameter": 0.3,
"microvia_drill": 0.1,
"name": "Default",
"pcb_color": "rgba(0, 0, 0, 0.000)",
"schematic_color": "rgba(0, 0, 0, 0.000)",
"track_width": 0.2,
"via_diameter": 0.7,
"via_drill": 0.3,
"wire_width": 6
},
{
"bus_width": 12,
"clearance": 0.3,
"diff_pair_gap": 0.25,
"diff_pair_via_gap": 0.25,
"diff_pair_width": 0.2,
"line_style": 0,
"microvia_diameter": 0.3,
"microvia_drill": 0.1,
"name": "Power",
"pcb_color": "rgba(0, 0, 0, 0.000)",
"schematic_color": "rgba(0, 0, 0, 0.000)",
"track_width": 0.5,
"via_diameter": 0.8,
"via_drill": 0.4,
"wire_width": 6
}
],
"meta": {
"version": 3
},
"net_colors": null,
"netclass_assignments": {
"+12V": "Power",
"+3.3V": "Power",
"GND": "Power",
"Net-(J1-Pin_1)": "Power",
"Net-(M1-+)": "Power"
},
"netclass_patterns": []
},
"pcbnew": {
"last_paths": {
"gencad": "",
"idf": "",
"netlist": "",
"specctra_dsn": "",
"step": "",
"vrml": ""
},
"page_layout_descr_file": ""
},
"schematic": {
"annotate_start_num": 0,
"drawing": {
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"dashed_lines_gap_length_ratio": 3.0,
"default_line_thickness": 6.0,
"default_text_size": 50.0,
"field_names": [],
"intersheets_ref_own_page": false,
"intersheets_ref_prefix": "",
"intersheets_ref_short": false,
"intersheets_ref_show": false,
"intersheets_ref_suffix": "",
"junction_size_choice": 3,
"label_size_ratio": 0.375,
"pin_symbol_size": 25.0,
"text_offset_ratio": 0.15
},
"legacy_lib_dir": "",
"legacy_lib_list": [],
"meta": {
"version": 1
},
"net_format_name": "",
"page_layout_descr_file": "",
"plot_directory": "",
"spice_current_sheet_as_root": false,
"spice_external_command": "spice \"%I\"",
"spice_model_current_sheet_as_root": true,
"spice_save_all_currents": false,
"spice_save_all_voltages": false,
"subpart_first_id": 65,
"subpart_id_separator": 0
},
"sheets": [
[
"329ae8e6-8978-4f37-bf9f-fdaf2d2e679d",
""
]
],
"text_variables": {}
}

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TinyFanControl.kicad_sch Normal file
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35
scripts/calc_dc_voltages.py Executable file
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#!/usr/bin/env python3
import numpy as np
vref = 0.8
def par(*rlist):
s = 0
for r in rlist:
s += 1 / r
return 1 / s
Rt = 18e3
Ra = 2.2e3
Rb = 4.7e3
Rc = 10e3
Rd = 22e3
Rs = [Ra, Rb, Rc, Rd]
Rbs = []
for i in range(1, 2**len(Rs)):
rlist = []
for k in range(len(Rs)):
if i & (1 << k):
rlist.append(Rs[k])
Rbs.append(par(*rlist))
Rbs = np.array(Rbs)
vouts = vref * (Rbs + Rt) / Rbs
for vout in sorted(list(vouts)):
print(f"{vout:6.2f} V")

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scripts/calc_dcdc_inductor.py Executable file
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#!/usr/bin/env python3
import numpy as np
iout_max = 0.5 # A
vout_min = 1.5 # V
vout_max = 12.0 # V
vin_min = 5.0 # V
vin_max = 12.0 # V
K = 0.4 # factor
fsw = 1200e3 # Hz
vin_max = vin_min = 12
vout_max = vout_min = 4
L_max = (vin_max - vout_min) / (fsw * K * iout_max) * vout_max / vin_max
dI_L = vout_max / vin_max * (vin_max - vout_min) / (L_max * fsw)
I_L_peak = iout_max + dI_L / 2
I_L_rms = np.sqrt(iout_max**2 + dI_L**2 / 12)
print(f"ΔI_l = {dI_L*1e3:7.3f} mA")
print(f"L(max) = {L_max*1e6:7.3f} μH")
print(f"I_L_peak = {I_L_peak*1e3:7.3f} mA")
print(f"I_L_rms = {I_L_rms*1e3:7.3f} mA")