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Microgrid-Home-Energy-Monitor

dish-glitch·Microgrid-Home-Energy-Monitor·hardware/Microgrid-Home-Energy-Monitor.kicad_pcb

Microgrid-Home-Energy-Monitor PCB layout, top view — open source ESP32 board by dish-glitch

About the Microgrid-Home-Energy-Monitor PCB

Microgrid-Home-Energy-Monitor is an open source ESP32 PCB design by dish-glitch, published on GitHub under the MIT license. It is a 2-layer board measuring 130.2 × 72.9 mm, with 36 components from 19 distinct parts.

Its main chip is the ESP32-WROOM-32E-N4, from the ESP32 family. Other key parts include the MCP6002-I/P and AMS1117-3.3. By type, the board carries 14 resistors, 9 capacitors, 6 connectors, 3 ICs, 2 switches and 2 diodes.

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

From the project

I want to understand how power is measured, how the grid sees demand so I will try to build a custom PCB that clips non-invasive current transformer sensors around wires and measure real-time power usage I would like it to measure Watts. Apparent power (VA) and Power factor.

Custom 2-layer PCB designed in KiCad 9. Measures real-time household power consumption using non-invasive current transformer sensors.

CC1 and CC2 resistors (5.1kΩ to GND) identify the board as a USB device to the host charger, enabling 5V/500mA delivery per USB-C spec.

1. Burden resistor (33Ω): The SCT-013 outputs a small currecnt but the ESP32 measures the voltage. The 33 ohm burden resisotr converts that currecnt into a voltage using Ohm's law. At the senors's max rated current, this produeces 1.65 V RMS 2.33 V peak.

Microgrid-Home-Energy-Monitor, from the project README
From the project README

Main components on the Microgrid-Home-Energy-Monitor

ESP32-WROOM-32E-N4MCP6002-I/PAMS1117-3.3

Microgrid-Home-Energy-Monitor bill of materials (BOM)

36 components, 19 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-WROOM-32E-N4
ESP32-WROOM-32
U1
1
MCP6002-I/P
MCP6002-xP
U2
1
AMS1117-3.3
U3
2
SJ-3523-SMT
AudioJack2
J1, J2
1
Conn_01x04
J3
1
USB_C_Receptacle_USB2.0_16P
J4
1
Conn_01x06
J5
1
Conn_01x03
J6
2
6MM
SW_Push
SW1, SW2
2
LED
D1, D2
3
10u
C1, C2, C8
2
10uF
C3, C6
3
100NF
100nF
C4, C5, C9
1
100NF
0.1u
C7
2
33
R1, R4
6
10k
R2, R3, R5, R6, R7, R10
2
4.7k
R8, R9
2
5.1k
R11, R12
2
150
R13, R14

Microgrid-Home-Energy-Monitor design files

The KiCad project lives in the dish-glitch/Microgrid-Home-Energy-Monitor repository on GitHub; these links point at the commit this page was built from.

Microgrid-Home-Energy-Monitor: common questions

What microcontroller does the Microgrid-Home-Energy-Monitor use?

The Microgrid-Home-Energy-Monitor is built around the ESP32-WROOM-32E-N4, from the ESP32 family.

How big is the Microgrid-Home-Energy-Monitor PCB?

The Microgrid-Home-Energy-Monitor measures 130.2 × 72.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Microgrid-Home-Energy-Monitor?

36 components, from 19 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 Microgrid-Home-Energy-Monitor design files?

From the dish-glitch/Microgrid-Home-Energy-Monitor 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 Microgrid-Home-Energy-Monitor design in my own project?

Yes, under the terms of its MIT license, which dish-glitch chose for the repository.

Can I test firmware for the Microgrid-Home-Energy-Monitor 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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