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BSPD

FormulaBartonRacing·Electronics·BSPD/BSPD.kicad_pcb

BSPD PCB layout, top view — open source AVR/Arduino board by FormulaBartonRacing

About the BSPD PCB

BSPD is an open source AVR/Arduino PCB design by FormulaBartonRacing, published on GitHub. It is a 2-layer board measuring 65.1 × 52.9 mm, with 56 components from 23 distinct parts.

Its main chip is the SN74AHC1G02DBVR, from the AVR/Arduino family. Other key parts include the AMS1117-5.0. By type, the board carries 27 resistors, 12 capacitors, 6 diodes, 3 transistors, 2 connectors and 1 IC.

From the project

Repo for 2026 circuit boards

Current Sensor - LEM HTFS 400-P For 117.6V max voltage, 5kW corresponds to 42.5A

Ipn = 400A Uref = 2.5V (For 5V supply) Uout = Uref ± (1.25 . Ip/Ipn) => Uout = 2.63V for 42.5A input

References: https://www.lem.com/sites/default/files/productsdatasheets/htfs200_800-p.pdf

https://www.formulastudent.de/fileadmin/userupload/all/2020/importantdocs/ESF/ExampleBSPDV2.pdf

Main components on the BSPD

AMS1117-5.0

BSPD bill of materials (BOM)

56 components, 23 distinct parts.

QtyPartRefs
1
AMS1117-5.0
U2
1
AO3401A
Q1
2
BSS138
Q2, Q3
1
Conn_01x04
J2
1
Conn_01x02
J3
3
LM393AD
I2, I3, I5
1
SN74AHC1G02DBVR
I4
1
G2RL-1-E
K2
1
1N4148
D1
1
Err_R_LED
D2
1
PWR_G_LED
D3
3
P6KE33CA
D5, D6, D7
3
10µ
C1, C6, C7
8
100n
C2, C3, C4, C5, C8, C9, C11, C12
1
10µ
C10
5
100k
R1, R2, R9, R11, R18
11
10k
R3, R4, R6, R8, R10, R12, R13, R14 +3
2
20k
R5, R7
3
39k
R15, R17, R19
2
560k
R16, R21
Show 3 more
QtyPartRefs
2
100R
R24, R25
1
470
R26
1
560
R27

BSPD design files

The KiCad project lives in the FormulaBartonRacing/Electronics repository on GitHub; these links point at the commit this page was built from.

BSPD: common questions

What microcontroller does the BSPD use?

The BSPD is built around the SN74AHC1G02DBVR, from the AVR/Arduino family.

How big is the BSPD PCB?

The BSPD measures 65.1 × 52.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the BSPD?

56 components, from 23 distinct parts. The full bill of materials is listed on this page.

Where can I download the BSPD design files?

From the FormulaBartonRacing/Electronics repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the BSPD design in my own project?

The repository has no license, so all rights stay with FormulaBartonRacing. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the BSPD without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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