2 layers64.8 × 65.5 mm
Precharge.old
sebgothard/FS_Electronics
Projects for Formula Student UK competition 2024-25.
38 parts2GPL-3.0
2 layers95.5 × 61 mm
Precharge
sebgothard/FS_Electronics2Projects for Formula Student UK competition 2024-25.
- Size
- 95.5 × 61 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 44
- Nets
- 26
- Pads
- 129
- Tracks, vias
- 155, 14
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 4 Dec 2024
- Updated
- 31 Aug 2025
Overview
Precharge is an open-source printed circuit board by sebgothard, from the sebgothard/FS_Electronics repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 95.5 × 61 mm with 44 parts on 26 nets, routed with 155 tracks and 14 vias.
It is built around the PESE1-S12-S5-M-TR, ACPL-C87A-500E and 1N4448X-TP, with the 151031SS06000, 151031VS06000 and SI1539CDL-T1-GE3-VB among its other parts. Its parts include 17 resistors, 6 connectors, 4 capacitors, 4 ICs and 4 diodes.
Main components
6
PESE1-S12-S5-M-TR
SMD-5P,13.2x8.5mm-40℃~+105℃ 1 10.8V~13.2V 11.4mm 13.2mm 1W 200mA 2400uF 270kHz 3kV 5V 5mA 7.25mm 75mVp-p 82% Short Circuit Protection SMD-5P,13.2x8.5mm Isolated Power Modules ROHSCUIIsolated Power Modules
ACPL-C87A-500E
SO-8-40℃~+105℃ 0.99~1.01 100kHz 100nA 15kV/us 5000 9.9mV Differential Isolated ΔΣ (Sigma-Delta) modulator、Internal chopping stabilized amplifier、Low-Power Consumption、Single-supply isolation ±2.46V SO-8 Isolation Amplifiers ROHSBroadcom LimitedIsolation Amplifiers
1N4448X-TP
SOD-523-65℃~+150℃@(Tj) 1 Independent 1.25V@150mA 150mW 2.5uA@75V 250mA 4ns 75V SOD-523 Switching Diodes ROHSMicro Commercial ComponentsSwitching Diodes
151031SS06000
插件,D=3mm2.2V 20mA 35mcd 60° 640nm 650nm 插件,D=3mm LED Indication - Discrete ROHSWürth ElektronikLED Indication - Discrete151031VS06000
插件,D=3mm-40℃~+85℃ 2.2V~2.6V 3mm Round Lens 560nm 568nm 60° 78mW 9mcd~30mcd Discrete Diode Emerald Green 插件,D=3mm LED Indication - Discrete ROHSWürth ElektronikLED Indication - Discrete
SI1539CDL-T1-GE3-VB
SC-70-6MOSFETsVBsemi Elec
README
README.mdFormula Student Electronics
Hardware projects for Formula Student UK competition 2024-25.
💻Github https://github.com/sebgothard/FS_Electronics
Precharge
A device to charge the tractive system such that the battery voltage doesn't damage the internals of the inverter.
The precharge module.
Discharge
A device to discharge the tractive system, specifically a capacitor in the inverter.
The discharge module.
Parts
44| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 10K | Resistor_SMD:R_0805_2012Metric | R9, R10, R11, R12, R13, R14, R15 |
| 4 | 100nF | Capacitor_SMD:C_0805_2012Metric | C3, C4, C5, C6 |
| 2 | 110K | customFootprints:RC2512N_VIS | R2, R5 |
| 2 | 124K | customFootprints:RC2512N_VIS | R1, R4 |
| 2 | 1K | customFootprints:RC2512N_VIS | R3, R6 |
| 2 | 1N4448X-TP | Diode_SMD:D_SOD-523 | D1, D4 |
| 2 | 600 | Resistor_SMD:R_0805_2012Metric | R16, R17 |
| 2 | ACPL-C87A-500E | customFootprints:SOIC127P1150X361-8N | U1, U2 |
| 2 | LOGO | customFootprints:electric-shock-symbol | G***, G*** |
| 2 | PESE1-S12-S5-M-TR | customFootprints:SMD5_12.75X10.7X6.7_SINGLE_RCP | PS1, PS2 |
| 1 | 12V | customFootprints:RELAY_G9KB-1A_OMR | K1 |
| 1 | 151031SS06000 | customFootprints:WL-TMRC_3MM | D3 |
| 1 | 151031VS06000 | customFootprints:WL-TMRC_3MM | D2 |
| 1 | 15K | customFootprints:PWR263S-35-1002F_BRN | R7 |
| 1 | 9K7 | Resistor_SMD:R_0805_2012Metric | R8 |
| 1 | CONN_AIR | molexMiniFitJr:MFJ_2X1 | J1 |
| 1 | CONN_CAP | customFootprints:APP_ASMPR45-1X2-RK | J6 |
| 1 | CONN_HV | customFootprints:APP_ASMPR45-1X2-RK | J5 |
| 1 | CONN_LV | molexMiniFitJr:MFJ_2X1 | J4 |
| 1 | MC33072DR2G | customFootprints:SOIC127P600X175-8N | U3 |
| 1 | SI1539CDL-T1-GE3 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | Q1 |
| 1 | TL331 | Package_TO_SOT_SMD:SOT-23-5 | U4 |
| 1 | TSAL_CONN_AIR | molexMiniFitJr:MFJ_2X1 | J2 |
| 1 | TSAL_CONN_LV | molexMiniFitJr:MFJ_2X1 | J3 |
The 41 most common of 44 parts.
Questions
How big is the Precharge PCB?
It measures 95.5 × 61 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Precharge use?
44 parts, built around the PESE1-S12-S5-M-TR, ACPL-C87A-500E, 1N4448X-TP and 151031SS06000. 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 Precharge KiCad files?
From the sebgothard/FS_Electronics repository on GitHub, at the commit this page was made from: the board is Precharge/precharge.kicad_pcb and its schematic Discharge/discharge.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Precharge design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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