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Usb power meter

aeremin·firefly_zephyr·hardware/usb_power_meter/usb_power_meter.kicad_pcb

Usb power meter PCB layout, top view — open source STM32 board by aeremin
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About the Usb power meter PCB

Usb power meter is an open source STM32 PCB design by aeremin, published on GitHub. It is a 4-layer board measuring 37 × 44 mm, with 42 components from 30 distinct parts.

Its main chip is the STM32F411CEUX, from the STM32 family. Other key parts include the USBLC6-2P6. By type, the board carries 19 capacitors, 8 resistors, 3 connectors, 2 ICs, 2 transistors and 2 crystals.

It belongs with the iot & wireless designs in this gallery.

From the project

(--pristine can be omitted if previous build used same subfolder, it basically means "clean, non-incremental build")

(--pristine can be omitted if previous build used same subfolder, it basically means "clean, non-incremental build")

This repo contains sources to build following firmware images:

Both of the services can be used by dedicated Android app. App sources are here. Battery measurement. Will continously monitor battery voltage and Report it via bluetooth - see above. * Will disable radio and LED (will keep Bluetooth enabled) if battery level is low.

Main components on the Usb power meter

STM32F411CEUXUSBLC6-2P6

Usb power meter bill of materials (BOM)

42 components, 30 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
STM32F411CEUX
nRF52833-QDxx
U1
1
USBLC6-2P6
INA226
U2
1
2N7002
Q1
1
AO3401A
IRML6401
Q2
1
C841881
32Mhz crystal
X1
1
C5265839
32.768kHz crystal
X2
1
KH-1.27PH180-2X5P-L7.2-SMT
kinghelm(金航标)
J1
1
917-P81A202ES60201
精拓金
J2
1
A/F LCPTrue color1.2pillar_C42605
精拓金
J4
1
Antenna
AE1
1
TS-1187A-B-A-B
XKB Connectivity(中国星坤)
SW1
1
C2297
0805G (Green)
KENTO
LED1
1
C191023
1N5819WS
Hottech(合科泰)
D1
1
4.7 nH
L1
1
2.2 nH
L2
4
12 pF
C1, C2, C15, C16
1
1.0 pF
C3
1
1.2 pF
C4
5
100 nF
C5, C7, C11, C14, C18
3
4.7 uF
C6, C17, C19
Show 10 more
QtyPartRefs
1
10 uF
C8
1
10 nF
C9
1
100 pF
C10
2
1.0 uF
C12, C13
1
5.1K
2R2
R1
1
5.1K
10k
R2
2
10K
10k
R3, R7
1
330R
100R Resistor
R4
2
330R
10k
R5, R6
1
330R
LRP12FTDSR020
R8

Usb power meter design files

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

Usb power meter: common questions

What microcontroller does the Usb power meter use?

The Usb power meter is built around the STM32F411CEUX, from the STM32 family.

How big is the Usb power meter PCB?

The Usb power meter measures 37 × 44 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Usb power meter?

42 components, from 30 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 Usb power meter design files?

From the aeremin/firefly_zephyr 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 Usb power meter design in my own project?

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

Can I test firmware for the Usb power meter 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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