2 layers30.8 × 19.6 mm
2 layers63 × 37.5 mm
Bal02
mwuerms/balancer_hwhardware for balancer
- Size
- 63 × 37.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 32
- Nets
- 49
- Pads
- 123
- Tracks, vias
- 226, 26
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 30 Apr 2026
- Updated
- 6 May 2026
Overview
Bal02 is an open-source printed circuit board by mwuerms, from the mwuerms/balancer_hw repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 63 × 37.5 mm with 32 parts on 49 nets, routed with 226 tracks and 26 vias.
It is built around the SN65HVD230DR, M24C16-FMN6TP and TLV76050DBZR-MS, with the 1N4148WT and BAT54J among its other parts. Its parts include 10 resistors, 7 capacitors, 6 ICs, 6 crystals and 3 diodes.
Main components
5
SN65HVD230DR
SOP-8CAN TransceiversTokmasM24C16-FMN6TP
SO-8-40℃~+85℃ 1.7V~5.5V 16Kbit 200 Years 4,000,000 Cycles 400kHz 5ms Hardware write protection function、Built-in power-on reset (POR) I2C SO-8 EEPROM ROHSSTMicroelectronicsEEPROM
TLV76050DBZR-MS
SOT-23SOT-23 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMSKSEMIUncategorised
1N4148WT
SOD-523-55℃~+150℃ 1.25V@150mA 100V 150mA 150mW 1uA@75V 2A 4ns Independent SOD-523 Switching Diodes ROHShongjiachengSwitching Diodes
BAT54J
SOD-323F1 Independent 200mA 2uA@25V 30V 600mA 800mV@100mA SOD-323F Schottky Diodes ROHSNexperiaSchottky Diodes
README
README.mdbalancer_hw
hardware (pcb, 3d designs, ...) for balancer robot
cad
openSCAD models
- bal01: oldest version, not in use anymore
- bal02: working copy of bal01, this will change a lot in future
kicad
PCBs in KiCad
- bal01: rotary sensor for motor speed, MA70x, used with G431B-ESC1
- bal02: mainboard sporting STM32L432KB Nucleo-32
Parts
32| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | R | Resistor_SMD:R_0402_1005Metric | R1, R2, R3, R4, R9, R10 |
| 4 | 100nF | Capacitor_SMD:C_0603_1608Metric | C2, C5, C6, C7 |
| 4 | ~ | bal:H2_100mil | X1, X2, X3, X5 |
| 2 | 100uF/25V | bal:WCAP-ATG8 | C3, C4 |
| 2 | 1N4148WT | Diode_SMD:D_SOD-523 | D2, D3 |
| 2 | 4k7 | Resistor_SMD:R_0603_1608Metric | R5, R6 |
| 2 | ~ | bal:H4_50mil | X4, X6 |
| 1 | 0R | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C1 |
| 1 | 120R | Resistor_SMD:R_0603_1608Metric | R8 |
| 1 | BAT54J | Diode_SMD:D_SOD-323F | D1 |
| 1 | M24C16-FMN6TP | bal:SOIC127P600X175-8N | IC4 |
| 1 | MPU9250_SMD_MODULE | bal:MPU9250_SMD_MODULE | IC3 |
| 1 | SN65HVD230DR | bal:SOT127P600X175-8N | IC5 |
| 1 | TLV76050DBZR | bal:SOT95P237X112-3N | IC6 |
| 1 | nRF24L01_SMD_MODULE | bal:nRF24L01_SMD_MODULE | IC2 |
| 1 | nucleo32-L432 | bal:nucleo32 | IC1 |
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Questions
How big is the Bal02 PCB?
It measures 63 × 37.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Bal02 use?
32 parts, built around the SN65HVD230DR, M24C16-FMN6TP, TLV76050DBZR-MS and 1N4148WT. 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 Bal02 KiCad files?
From the mwuerms/balancer_hw repository on GitHub, at the commit this page was made from: the board is kicad/bal02/bal02.kicad_pcb and its schematic kicad/bal01/bal01.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Bal02 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).