HardLabs

Mini-Power-Gauge

oct-karim·Mini-Power-Gauge·PCB/Power_Gauge_PCB.kicad_pcb

Mini-Power-Gauge PCB layout, top view — open source AVR/Arduino board by oct-karim

About the Mini-Power-Gauge PCB

Mini-Power-Gauge is an open source AVR/Arduino PCB design by oct-karim, published on GitHub. It is a 2-layer board measuring 92.1 × 99.4 mm, with 54 components from 41 distinct parts.

Its main chip is the ATMEGA328P-A, from the AVR/Arduino family. Other key parts include the PCF8574AT and INA226. By type, the board carries 18 test points, 11 resistors, 9 capacitors, 5 connectors, 4 diodes and 3 ICs.

It belongs with the displays & leds designs in this gallery.

From the project

A mini power gauge that mesures current and voltage.

A simple PCB, functional and efficient. For monitoring current, voltage and power.

This simple power gauge, controlled by the ATmega328P microcontroller has a voltage range of 0-36V and a current range of 0-3A. The footprints have been chosen to be easy to solder. And the components are widely available.

Mini-Power-Gauge, from the project README
From the project README

Main components on the Mini-Power-Gauge

ATMEGA328P-APCF8574ATINA226

Mini-Power-Gauge bill of materials (BOM)

54 components, 41 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA328P-A
ATmega328P-A
U1
1
PCF8574AT
U2
1
INA226
U3
1
2N3904
Q1
1
16MHZ
16MHz
X1
1
USB_C_RECEPTACLE_POWERONLY_6P
USB_C_Receptacle_PowerOnly_6P
J1
1
CONN_01X06_SOCKET
Conn_01x06_Socket
J2
2
3.5MM
3.5mm
J3, J4
1
CONN_01X16_SOCKET
Conn_01x16_Socket
J5
1
HY1602E
DS1
1
LED_R
TP1
1
LED_G
TP2
1
Led_B
TP3
1
SCL_INA226
TP4
1
SDA_INA226
TP5
1
5V
TP6
1
INPUT
TP7
1
OUTPUT
TP8
1
P1
TP9
1
P3
TP10
Show 21 more
QtyPartRefs
1
P5
TP11
1
P7
TP12
1
P0
TP13
1
P2
TP14
1
P4
TP15
1
P6
TP16
2
Mesure
TP17, TP18
1
RED
D1
1
GREEN
D2
1
BLUE
D3
1
SMAJ5.0A
D4
1
300Ω@100MHz
FB1
6
100N
100n
C1, C2, C3, C7, C8, C9
2
22P
22p
C4, C6
1
10µ
C5
2
5.1K
R1, R2
1
10K
10k
R3
3
470
R4, R5, R6
2
4.7K
4.7k
R7, R8
2
1k
R9, R10
1
0,02
R11

Mini-Power-Gauge design files

The KiCad project lives in the oct-karim/Mini-Power-Gauge repository on GitHub; these links point at the commit this page was built from.

Mini-Power-Gauge: common questions

What microcontroller does the Mini-Power-Gauge use?

The Mini-Power-Gauge is built around the ATMEGA328P-A, from the AVR/Arduino family.

How big is the Mini-Power-Gauge PCB?

The Mini-Power-Gauge measures 92.1 × 99.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mini-Power-Gauge?

54 components, from 41 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-Gauge design files?

From the oct-karim/Mini-Power-Gauge 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-Gauge design in my own project?

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

Can I test firmware for the Mini-Power-Gauge without the hardware?

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

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