4 layers157 × 100 mm
Spr23e bmu
derlucae98/spr23e-bmu
Battery Management Unit for the Scuderia Mensa SPR23e/SPR24e electric race car
433 parts1MIT
2 layers
Making an ALU from scratch on a PCB -- No adder IC!
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 169
- Nets
- 147
- Pads
- 717
- Tracks, vias
- 137, 25
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 8 May 2026
- Updated
- 11 May 2026
Overview
ALU is an open-source printed circuit board by LLucasCoding, from the LLucasCoding/PCBALU repository on GitHub, published under the MIT licence. It is a 2-layer board with 169 parts on 147 nets, routed with 137 tracks and 25 vias.
It is built around the 74LVC2G08, 74LVC2G86DP and 74LVC1G332GV, with the 74LVC2G32DP, 74LVC2G02DC and 74LVC1G08Z among its other parts. Its parts include 60 capacitors, 60 ICs, 33 resistors, 11 diodes and 4 switches.
Main components
6
74LVC2G08
VSSOP-8-0.5mmVSSOP-8-0.5mm Microcontrollers (MCU/MPU/SOC) ROHSNXP SemiconductorsMicrocontrollers (MCU/MPU/SOC)
74LVC2G86DP
TSSOP-8-40℃~+125℃ 1.65V~5.5V 2 2 3.6ns@5V,50pF 32mA 32mA 4uA 74LVC Series XOR Gate TSSOP-8 Logic Gates ROHSNexperiaLogic Gates
74LVC1G332GV
SC-74-40℃~+125℃ 1 1.65V~5.5V 1.7V~2V 3.5ns@5V,50pF 32mA 32mA 4uA 700mV~800mV 74LVC Series OR Gate SC-74 Logic Gates ROHSNexperiaGates74LVC2G32DP
TSSOP-8-40℃~+125℃ 1.65V~5.5V 1.7V~2V 2 2 3.2ns@5V,50pF 3.8V~4.1V 32mA 32mA 430mV~550mV 4uA 74LVC Series OR Gate TSSOP-8 Logic Gates ROHSNexperiaLogic Gates74LVC2G02DC
VSSOP-8-40℃~+125℃ 1.65V~5.5V 1.7V~2V 2 2 32mA 32mA 4.3ns@5V,50pF 4uA 700mV~800mV 74LVC Series NOR Gate VSSOP-8 Logic Gates ROHSNexperiaLogic Gates
74LVC1G08Z
SOT-553-5-40℃~+125℃ 1 1.65V~5.5V 1.7V、2V 2 2.4V、3.8V 32mA 32mA 4ns@5V,50pF 550mV、800mV 700mV、800mV 74LVC Series AND Gate SOT-553-5 Logic Gates ROHSDiodes IncorporatedLogic Gates
Parts
169| Qty | Value | Footprint | References |
|---|---|---|---|
| 59 | 100n | Capacitor_SMD:C_0805_2012Metric | C2, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23, C24 +43 |
| 25 | 74LVC2G08 | Package_SO:VSSOP-8_2.3x2mm_P0.5mm | U2, U3, U4, U5, U10, U11, U13, U14, U21, U22, U23, U24, U27, U51, U52, U53 +9 |
| 22 | 10K | Resistor_SMD:R_0805_2012Metric | R1, R2, R3, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22 +6 |
| 20 | 74LVC2G86 | Package_SO:VSSOP-8_2.3x2mm_P0.5mm | U1, U12, U17, U18, U19, U20, U39, U40, U41, U42, U43, U44, U45, U46, U47, U48 +4 |
| 8 | 220 | Resistor_SMD:R_0805_2012Metric | R24, R25, R26, R27, R28, R29, R30, R31 |
| 8 | 74LVC1G332 | Package_TO_SOT_SMD:SOT-23-6 | U31, U32, U33, U34, U35, U36, U37, U38 |
| 8 | LED_GREEN | LED_SMD:LED_0805_2012Metric | D1, D2, D3, D4, D5, D6, D7, D8 |
| 4 | 74LVC2G32 | Package_SO:VSSOP-8_2.3x2mm_P0.5mm | U7, U8, U15, U16 |
| 2 | 470 | Resistor_SMD:R_0805_2012Metric | R32, R33 |
| 2 | 74LVC2G02 | Package_SO:VSSOP-8_2.3x2mm_P0.5mm | U25, U26 |
| 2 | LED_RED | LED_SMD:LED_0805_2012Metric | D9, D10 |
| 2 | SW_DIP_x08 | Button_Switch_THT:SW_DIP_SPSTx08_Slide_9.78x22.5mm_W7.62mm_P2.54mm | SW3, SW4 |
| 1 | 10u | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C1 |
| 1 | 3V0 | Battery:Battery_Panasonic_CR2032-VS1N_Vertical_CircularHoles | BT1 |
| 1 | 680 | Resistor_SMD:R_0805_2012Metric | R23 |
| 1 | 74LVC1G08 | Package_TO_SOT_SMD:SOT-23-5 | U28 |
| 1 | LED_YELLOW | LED_SMD:LED_0603_1608Metric | D11 |
| 1 | SW_DIP_x06 | Button_Switch_THT:SW_DIP_SPSTx06_Slide_9.78x17.42mm_W7.62mm_P2.54mm | SW1 |
| 1 | SW_SPST | Button_Switch_THT:SW_DIP_SPSTx01_Slide_9.78x4.72mm_W7.62mm_P2.54mm | SW2 |
Questions
What parts does the ALU use?
169 parts, built around the 74LVC2G08, 74LVC2G86DP, 74LVC1G332GV and 74LVC2G32DP. 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 ALU KiCad files?
From the LLucasCoding/PCBALU repository on GitHub, at the commit this page was made from: the board is ALU.kicad_pcb and its schematic ALU.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the ALU design in my own project?
Its repository publishes it under the MIT 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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