HardLabs

BatteryMonitor

BlockWorker·ModularAudio·BatteryMonitor/BatteryMonitor.kicad_pcb

BatteryMonitor PCB layout, top view — open source STM32 board by BlockWorker

About the BatteryMonitor PCB

BatteryMonitor is an open source STM32 PCB design by BlockWorker, published on GitHub. It is a 4-layer board measuring 40 × 40 mm, with 71 components from 38 distinct parts.

Its main chip is the STM32L071KZUx, from the STM32 family. Other key parts include the BQ76905 and ADuM1252. By type, the board carries 26 capacitors, 21 resistors, 7 connectors, 5 test points, 4 diodes and 3 ICs.

It belongs with the audio and power & battery designs in this gallery.

From the project

Compact, modular, versatile, hi-fi audio system concept.

Main components on the BatteryMonitor

BQ76905STM32L071KZUxADuM1252

BatteryMonitor bill of materials (BOM)

71 components, 38 distinct parts.

QtyPartRefs
1
BQ76905
U1
1
STM32L071KZUx
U2
1
ADuM1252
U3
1
NX138BK
Q1
2
NTMFS0D6N04XM
Q2, Q3
1
SWD
J1
1
BAT+
J2
1
BAL_THERM
J3
1
I2C
J4
1
BAT-
J5
1
PACK_OUT
J6
1
PWR_SWITCH
J7
1
40A
F1
1
WAKE
SW1
1
UART_TX
TP1
1
UART_RX
TP2
1
SDA
TP3
1
SCL
TP4
1
ALERT
TP5
1
SS0840WS
D1
Show 18 more
QtyPartRefs
2
BZT52C15
D2, D3
1
MMSZ4678
D4
11
0.1µF
C1, C2, C3, C4, C7, C9, C11, C16 +3
1
1µF 25V
C5
1
10µF 50V
C6
1
10µF 25V
C8
6
220nF
C10, C13, C14, C15, C17, C18
2
1nF
C12, C19
1
100pF
C21
2
0.1µF 100V
C24, C25
1
3.3nF
C26
6
10kΩ
R1, R2, R3, R4, R7, R8
6
10Ω
R5, R6, R9, R10, R11, R12
1
1MΩ
R13
3
4.7kΩ
R14, R15, R21
2
100Ω
R16, R17
2
10MΩ
R18, R19
1
1mΩ 2W
R20

BatteryMonitor design files

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

BatteryMonitor: common questions

What microcontroller does the BatteryMonitor use?

The BatteryMonitor is built around the STM32L071KZUx, from the STM32 family.

How big is the BatteryMonitor PCB?

The BatteryMonitor measures 40 × 40 mm, has 4 copper layers and is 1.6062 mm thick.

How many components are on the BatteryMonitor?

71 components, from 38 distinct parts. The full bill of materials is listed on this page.

Where can I download the BatteryMonitor design files?

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

Can I use the BatteryMonitor design in my own project?

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

Can I test firmware for the BatteryMonitor without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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