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PowerMeter

dianventer·OpenAmpMeter·Hardware/PowerMeter/PowerMeter.kicad_pcb

PowerMeter PCB layout, top view — open source ESP32 board by dianventer
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About the PowerMeter PCB

PowerMeter is an open source ESP32 PCB design by dianventer, published on GitHub. It is a 4-layer board measuring 30 × 45 mm, with 42 components from 17 distinct parts.

Its main chip is the ESP32-C3, from the ESP32 family. Other key parts include the AMS1117-3.3 and TPD4EUSB30. By type, the board carries 19 capacitors, 11 resistors, 3 ICs, 3 switches, 2 connectors and 2 inductors.

From the project

A Low Cost ESP32 C3 based current meter. Hardware is availble in two versions. Firmware currently in progress. Webapp and server code to come soon

Main components on the PowerMeter

ESP32-C3AMS1117-3.3TPD4EUSB30

PowerMeter bill of materials (BOM)

42 components, 17 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-C3
U1
1
AMS1117-3.3
U2
1
TPD4EUSB30
U3
1
CRYSTAL_GND24
Crystal_GND24
Y2
1
C2927038
USB_C_Receptacle
J2
1
AUDIOJACK4
AudioJack4
J3
3
SW_Push
SW1, SW2, SW3
1
C2827302
LED_GBAR
D2
2
2.2NH
2.2nH
L1, L2
2
3.3PF
3.3pF
C1, C2
2
10PF
10pF
C3, C4
10
C2857981
100nF 25V
C5, C6, C7, C8, C10, C11, C13, C16 +2
5
10UF
10uF
C9, C12, C14, C15, C19
1
22R
R1
5
5K1
R2, R3, R4, R5, R6
3
100
R7, R8, R9
2
1K
R10, R11

PowerMeter design files

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

PowerMeter: common questions

What microcontroller does the PowerMeter use?

The PowerMeter is built around the ESP32-C3, from the ESP32 family.

How big is the PowerMeter PCB?

The PowerMeter measures 30 × 45 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the PowerMeter?

42 components, from 17 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 PowerMeter design files?

From the dianventer/OpenAmpMeter 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 PowerMeter design in my own project?

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

Can I test firmware for the PowerMeter without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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