HardLabs

Mini power

hnz1102·mini-power·hardware/mini-power.kicad_pcb

Mini power PCB layout, top view — open source ESP32 board by hnz1102
Simulate this board

About the Mini power PCB

Mini power is an open source ESP32 PCB design by hnz1102, published on GitHub. It is a 2-layer board measuring 46 × 54 mm, with 49 components from 30 distinct parts.

Its main chip is the ESP32-C3-WROOM-02-N4, from the ESP32 family. Other key parts include the PCA9306D, SSD1306_DISPLAY, AP33772SDKZ-13-FA01 and NJW1933F1. By type, the board carries 19 resistors, 12 capacitors, 5 ICs, 3 connectors, 3 switches and 2 transistors.

It belongs with the power & battery, dev boards & breakouts and iot & wireless designs in this gallery.

From the project

Mini-Power is a small, portable DC power supply unit designed to provide a convenient and reliable source of adjustable voltage for your electronic devices and breadboard experiments.

Mini-Power is a small, portable DC power supply unit designed to provide a convenient and reliable source of adjustable voltage for your electronic devices and breadboard experiments. Powered from a USB Power Delivery (PD) charger, it supports both Standard Power Range (SPR) and Extended Power Range (EPR) modes, making it perfect for electronics developers, students, and anyone who needs a compact bench power supply.

Mini power, from the project README
From the project README

Main components on the Mini power

PCA9306DSSD1306_DISPLAYESP32-C3-WROOM-02-N4AP33772SDKZ-13-FA01NJW1933F1

Mini power bill of materials (BOM)

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

QtyPartRefs
1
PCA9306D
U101
1
SSD1306_DISPLAY
U102
1
ESP32-C3-WROOM-02-N4
U103
1
AP33772SDKZ-13-FA01
U104
1
NJW1933F1
U105
2
DMN3008SFG
Q101, Q102
1
USB4105-GF-A
J101
1
2057-PH2-04-UA
UPPER OUT
J102
1
2057-PH2-04-UA
LOWER OUT
J103
1
SOLDERJUMPER_2_OPEN
SolderJumper_2_Open
JP101
3
TS-06104
SW101, SW102, SW103
1
3147-B1931NB--20C007614U1930
LED BLUE
D101
1
SK36A-LTP
D102
1
MH2029-601Y
FB101
1
22UH
22uH
L101
2
1UF
1uF
C101, C110
5
0.1UF/50V
0.1uF/50V
C102, C103, C105, C106, C108
2
10UF/50V
10uF/50V
C104, C111
1
0.01UF/50V
10uF/50V
C107
1
2.2UF/50V
2.2uF/50V
C109
Show 10 more
QtyPartRefs
1
47UF
47uF
C112
8
10K
R101, R105, R107, R111, R117, R118, R119, R120
1
200K
R102
3
5K1
R103, R104, R116
1
1K
R106
2
4.7K
R108, R109
1
5m
R110
1
100R
10R
R112
1
100
R114
1
3K09
R115

Mini power design files

The KiCad project lives in the hnz1102/mini-power repository on GitHub; these links point at the commit this page was built from.

Mini power: common questions

What microcontroller does the Mini power use?

The Mini power is built around the ESP32-C3-WROOM-02-N4, from the ESP32 family.

How big is the Mini power PCB?

The Mini power measures 46 × 54 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mini power?

49 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 Mini power design files?

From the hnz1102/mini-power 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 Mini power design in my own project?

The repository has no license, so all rights stay with hnz1102. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Mini power 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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