2 layers122 × 92 mm
HondaPico
jgazeley/accord
Raspberry Pi Pico W firmware and keyless-entry hardware for a 2001 Honda Accord.
84 partsApache-2.0
2 layers120 × 83 mm
Accord logger
jgazeley/accordRaspberry Pi Pico W firmware and keyless-entry hardware for a 2001 Honda Accord.
- Size
- 120 × 83 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 147
- Nets
- 135
- Pads
- 511
- Tracks, vias
- 1,351, 370
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 28 Oct 2026
- Updated
- 31 Oct 2026
Overview
Accord logger is an open-source printed circuit board by jgazeley, from the jgazeley/accord repository on GitHub, published under the Apache-2.0 licence. It is a 2-layer board of 120 × 83 mm with 147 parts on 135 nets, routed with 1,351 tracks and 370 vias.
It is built around the 74AHC1G17GVH, MAX3485ED and LM2678T-5.0, with the CD4011BM96, CD4071BM96 and CD4093BM96 among its other parts. Its parts include 52 resistors, 25 capacitors, 16 ICs, 16 diodes and 9 transistors. It belongs with the RP2040 boards of this library.
Main components
12
74AHC1G17GVH
SOT-753-40℃~+125℃ 1 1 2V~5.5V 4.6ns@5.5V,50pF 40uA 74AHC 8mA 8mA Schmitt trigger Unidirectional SOT-753 Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffers, Drivers, Receivers, Transceivers
MAX3485ED
SOP-8-40℃~+85℃ 1 1 10Mbps 1mA 3.135V~3.465V 32 Half-Duplex Transceiver ±8kV SOP-8 RS-485 / RS-422 ICs ROHSHTC Korea TAEJIN TechRS-485 / RS-422 ICs
LM2678T-5.0
TO-220-7-40℃~+125℃@(TJ) 1 260kHz 4.2mA 5A 5V 8V~40V Buck Buck Built-in Fixed No TO-220-7 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
CD4011BM96
SOIC-14-55℃~+125℃ 1.5V~4V 1uA 2 3.4mA 3.4mA 3.5V~11V 3V~18V 4 4.95V、9.95V、14.95V 4000B Series 50mV 90ns@15V,50pF NAND Gate SOIC-14 Logic Gates ROHSTexas InstrumentsLogic GatesCD4071BM96
SOIC-14-55℃~+125℃ 1.5V~4V 1uA 2 3.4mA 3.4mA 3.5V~11V 3V~18V 4 4.95V、9.95V、14.95V 4000B Series 50mV 60ns@10V,50pF OR Gate SOIC-14 Logic Gates ROHSTexas InstrumentsLogic GatesCD4093BM96
SOIC-14-55℃~+125℃ 130ns@15V,50pF 2 3.4mA 3.4mA 3.6V~10.8V 3V~18V 4 4.95V、9.95V、14.95V 4000B Series 4uA 50mV 900mV~4V NAND Gate Schmitt trigger SOIC-14 Logic Gates ROHSTexas InstrumentsLogic Gates
CD74HC4020M96
SOIC-16-55℃~+125℃ 1 28ns 2V~6V 35MHz Asynchronous Divide-by-2 Falling Edge Up Counter SOIC-16 Counters, Dividers ROHSTexas InstrumentsCounters, DividersCD74HC4060M96
SOIC-16-55℃~+125℃ 1 14 2V~6V 35MHz 60ns 74HC Asynchronous Divide-by-2 Falling Edge Reset function Up Counter SOIC-16 Counters, Dividers ROHSTexas InstrumentsCounters, Dividers
DS3231SN#T&R
SOIC-16-300mil-40℃~+85℃ 0.84uA 2.3V~5.5V 200uA Built-in I2C Temperature compensation、Programmable clock output、Alarm function Yes SOIC-16-300mil Real Time Clocks ROHSMaxim Integrated (Analog Devices)Real Time Clocks
OV-7604-C7-32.768KHZ-20PPM-TA-QC
SMD3215-4P-40℃~+85℃ 1.2V~5.5V 32.768kHz 500nA ±20ppm ±20ppm SMD3215-4P Crystal Oscillators ROHSMicro CrystalCrystal Oscillators
SN74LVC1G97DBVRE4
SOT-23-6-40℃~+125℃ 1 1.65V~5.5V 10uA 2.4V、3.8V 24mA 24mA 400mV、550mV 6.3ns@3.3V 74LVC Configurable Multi-Function Gate SOT-23-6 Logic Gates ROHSTexas InstrumentsLogic Gates
TPS70950QDBVRQ1
SOT-23-5-40℃~+125℃@(Tj) 1 1.2V@(150mA) 150mA 190uVrms 1uA 30V 5V 62dB@(100Hz) Fixed Over Current Protection、Over Temperature Protection、Enable Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdAccord
Raspberry Pi Pico W firmware and keyless-entry hardware for a 2001 Honda Accord.
Two separate Pico W modules handle vehicle access and trip recording:
- Keyless entry — BLE commands, proximity-based lock/unlock, automatic relocking, and control of the trunk, lights and horn. Includes the KiCad schematic and PCB.
- Trip logger — records speed/tachometer pulses, ignition, brake-warning and analog readings to an SD card, then uploads recordings over Wi-Fi during ignition-off windows.
Both run on the Pico W without an always-on in-car Linux computer. A Raspberry Pi 4 serves as a portable development bench.
This is an ongoing vehicle-specific project. Build instructions, tests and current limitations are documented with each module. The logger server receives raw uploads and produces trip JSON. Personal databases and dashboards are outside this repository.
Development
This is the active home for Accord firmware, hardware and coordination.
See current status and
owner decisions. Earlier experiments remain in
accord-logger as historical reference; useful missing material is migrated
selectively. Installed services and private data are separate from this source tree.
License
Created by Jayson Gazeley (jgazeley). Software and documentation use Apache 2.0; original hardware designs use CERN-OHL-P 2.0. Reuse, including commercial use, is welcome with the notices required by those licenses preserved. See licensing and credit for attribution and third-party terms.
Parts
147| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | TestPoint | TestPoint:TestPoint_Pad_D2.0mm | TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9, TP12, TP17, TP20 |
| 10 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C7, C17, C18, C19, C20, C21, C22, C23, C24, C25 |
| 8 | 1N5819 | Diode_THT:D_DO-41_SOD81_P5.08mm_Vertical_AnodeUp | D101, D102, D103, D104, D105, D106, D107, D109 |
| 8 | 1k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R9, R12, R19, R24, R26, R29, R37, R38 |
| 6 | 100k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R17, R20, R25, R27, R34, R35 |
| 5 | 22k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R1, R3, R5, R10, R16 |
| 4 | 100k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R41, R43, R45, R46 |
| 4 | BSS138P | Package_TO_SOT_SMD:SOT-23 | Q2, Q3, Q4, Q8 |
| 4 | M3 mounting hole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | 10k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R21, R31, R36 |
| 3 | 4.7k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R8, R11, R18 |
| 3 | 4.7uF/50V | Capacitor_SMD:C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C4, C5, C6 |
| 3 | 47k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R14, R28, R44 |
| 3 | TestPoint | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP21, TP22, TP23 |
| 2 | 0R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R39, R40 |
| 2 | 1.5KE20A-E3/54 | Diode_THT:D_DO-201AD_P5.08mm_Vertical_KathodeUp | D108, D113 |
| 2 | 100nF/100V | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C9, C11 |
| 2 | 1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2 |
| 2 | 2N3904 | Package_TO_SOT_THT:TO-92_Inline | Q6, Q7 |
| 2 | 390R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R47, R48 |
| 2 | 4.7k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R50, R51 |
| 2 | 6.8k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R4, R6 |
| 2 | MMBT3904 | Package_TO_SOT_SMD:SOT-23 | Q1, Q9 |
| 2 | SB360-E3/54 | Diode_THT:D_DO-201AD_P5.08mm_Vertical_AnodeUp | D112, D115 |
| 1 | 1000uF/16V | Capacitor_THT:CP_Radial_D10.0mm_P5.00mm | C14 |
| 1 | 100nF/50V | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C13 |
| 1 | 100uF/50V | Capacitor_THT:CP_Radial_D8.0mm_P3.50mm | C10 |
| 1 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R30 |
| 1 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R52 |
| 1 | 10nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C16 |
| 1 | 10nF/50V | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C12 |
| 1 | 120R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R49 |
| 1 | 1N4004-E3/54 | Diode_THT:D_DO-41_SOD81_P5.08mm_Vertical_KathodeUp | D116 |
| 1 | 1N4148W | Diode_SMD:D_SOD-123 | D110 |
| 1 | 1k | Resistor_THT:R_Axial_DIN0414_L11.9mm_D4.5mm_P5.08mm_Vertical | R32 |
| 1 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R42 |
| 1 | 1uF | Capacitor_THT:C_Rect_L7.2mm_W5.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C3 |
| 1 | 2.2k | Resistor_THT:R_Axial_DIN0414_L11.9mm_D4.5mm_P5.08mm_Vertical | R13 |
| 1 | 2.2k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R33 |
| 1 | 220k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R15 |
| 1 | 22uH | Inductor_THT:L_Radial_D8.7mm_P5.00mm_Fastron_07HCP | L1 |
| 1 | 270R | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R23 |
| 1 | 33k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R2 |
| 1 | 33uF/16V | Capacitor_THT:CP_Radial_Tantal_D6.0mm_P2.50mm | C15 |
| 1 | 47uF/16V | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C8 |
| 1 | 7.5k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R7 |
| 1 | 74AHC1G17GV | Package_TO_SOT_SMD:SOT-353_SC-70-5_Handsoldering | U8 |
| 1 | 820R | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R22 |
| 1 | ASSR-601JV | accord-logger:ASSR-601Jx_SO-16-12Lead_11.634x10.363mm_P1.27mm | U3 |
| 1 | BIAS HI default OPEN | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP3 |
| 1 | BIAS LO default OPEN | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP4 |
| 1 | BR2032 | Battery:BatteryHolder_Keystone_3034_1x20mm | BT1 |
| 1 | BZX55C10 | Diode_THT:D_DO-35_SOD27_P2.54mm_Vertical_KathodeUp | D114 |
| 1 | BZX55C22 | Diode_THT:D_DO-35_SOD27_P2.54mm_Vertical_KathodeUp | D111 |
| 1 | Board connector 14-way | accord-logger:JAE_IL-AG5-14P-D3L2-A | J1 |
| 1 | CD4011BM96 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U12 |
| 1 | CD4071BM96 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U13 |
| 1 | CD4093BM96 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U14 |
| 1 | CD74HC4020M96 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U11 |
| 1 | CD74HC4060M96 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U10 |
| 1 | DS3231SN | Package_SO:SOIC-16W_7.5x10.3mm_P1.27mm | U16 |
| 1 | HOLD link | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP1 |
| 1 | IPD50P04P4L-11 | Package_TO_SOT_SMD:TO-252-3_TabPin2 | Q5 |
| 1 | LM2678T-5.0 | Package_TO_SOT_THT:TO-220-7_P2.54x3.7mm_StaggerOdd_Lead3.8mm_Vertical | U6 |
| 1 | MAX3485 | Package_DIP:DIP-8_W7.62mm | U15 |
| 1 | OV-7604-C7-32.768KHZ-20PPM-TA-QC | accord-logger:Oscillator_SMD_MicroCrystal_OV-7604-C7_SON-4_3.2x1.5mm | U7 |
| 1 | PC817 | Package_DIP:DIP-4_W7.62mm | U2 |
| 1 | RaspberryPi_Pico_W | Module:RaspberryPi_Pico_W_SMD_HandSolder | U1 |
| 1 | Reset RUN-GND | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J4 |
| 1 | SD breakout 6-way | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J5 |
| 1 | SN74LVC1G97DBVR | Package_TO_SOT_SMD:SOT-23-6_Handsoldering | U9 |
| 1 | Spare GP11-13 / switched power | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J3 |
| 1 | TERM default OPEN | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP2 |
| 1 | TPS3839K50DBZR | Package_TO_SOT_SMD:SOT-23 | U5 |
| 1 | TPS70950QDBVRQ1 | Package_TO_SOT_SMD:SOT-23-5_HandSoldering | U4 |
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Questions
How big is the Accord logger PCB?
It measures 120 × 83 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Accord logger use?
147 parts, built around the 74AHC1G17GVH, MAX3485ED, LM2678T-5.0 and CD4011BM96. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Accord logger KiCad files?
From the jgazeley/accord repository on GitHub, at the commit this page was made from: the board is logger/hardware/kicad/accord-logger.kicad_pcb and its schematic keyless/hardware/hondaPico.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Accord logger design in my own project?
Its repository publishes it under the Apache-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).