Precharge
About the Precharge PCB
Precharge is an open source PCB design by Lafayette-Motorsports, published on GitHub. It is a 2-layer board measuring 83.3 × 41.3 mm, with 28 components from 26 distinct parts.
Other key parts include the NE555D, LT1117-5.0 and SI7116DN-T1-E3. By type, the board carries 16 resistors, 3 ICs, 3 transistors, 3 capacitors, 2 connectors and 1 relay.
From the project
LV Board repository for Motorsports created 09.02.2025
LV Board repository for Motorsports created 09.02.2025
for repository admin (or other) questions - Sean McLoughlin mclougsm@lafayette.edu
Main components on the Precharge
Precharge bill of materials (BOM)
28 components, 26 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | NE555D LM2903 | DIP-8_W7.62mm | U1 |
| 1 | LT1117-5.0 NE555P | DIP-8_W7.62mm | U3 |
| 1 | SI7116DN-T1-E3 LR8N3-G | TO-92 | U4 |
| 1 | AON6411 BSS214NW | SOT-323_SC-70_Handsoldering | Q1 |
| 1 | AON6411 SS8550 | TO-92_Inline | Q2 |
| 1 | AON6411 IRLML5203 | SOT-23_Handsoldering | Q4 |
| 1 | CONN_01X02_PIN Screw_Terminal_01x02 | TerminalBlock_MaiXu_MX126-5.0-02P_1x02_P5.00mm | J1 |
| 1 | L717SDA15P1ACH4F Screw_Terminal_01x02 | TerminalBlock_MaiXu_MX126-5.0-02P_1x02_P5.00mm | J2 |
| 1 | G6L-1P_DC5 G3VM-61G2 | G-SOP4_OMR | K1 |
| 1 | 47U 47u | C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C1 |
| 1 | 47U 0.1u | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C3 |
| 1 | 0.1U 1u | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C6 |
| 1 | 10K 100k | R_Axial_DIN0516_L15.5mm_D5.0mm_P5.08mm_Vertical | R1 |
| 1 | 57.6K 100k | R_Axial_DIN0516_L15.5mm_D5.0mm_P5.08mm_Vertical | R2 |
| 1 | 22K 2k | R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R3 |
| 1 | 57.6K 22k | R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R4 |
| 2 | 100k | R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R5, R6 |
| 2 | 10M | R_Axial_DIN0516_L15.5mm_D5.0mm_P5.08mm_Vertical | R7, R8 |
| 1 | 10K 57.6k | R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R9 |
| 1 | 10K 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R10 |
Show 6 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 10K 100k | R_Axial_DIN0516_L15.5mm_D5.0mm_P7.62mm_Vertical | R11 |
| 1 | 150R 100k | R_Axial_DIN0516_L15.5mm_D5.0mm_P7.62mm_Vertical | R12 |
| 1 | 10K 200K | R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R13 |
| 1 | 10K 22k | R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R14 |
| 1 | 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R17 |
| 1 | 10K 5k | R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R18 |
Precharge design files
The KiCad project lives in the Lafayette-Motorsports/LVBoards repository on GitHub; these links point at the commit this page was built from.
Precharge: common questions
How big is the Precharge PCB?
The Precharge measures 83.3 × 41.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Precharge?
28 components, from 26 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Precharge design files?
From the Lafayette-Motorsports/LVBoards repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Precharge design in my own project?
The repository has no license, so all rights stay with Lafayette-Motorsports. Use it as a reference, and ask the author before reusing the design.
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