Hello guys, today I'll show you how to make a simple voltmeter/ammeter, so you can easily measure the voltage, current or power consumption of any charger or device, that uses the common 5.5mm connectors.

Feel free to visit https://jlcpcb.com to order professional PCBs at low prices for your projects. $2 - 2Layers 5pcs; 4&6Layers starting at $5.

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Schematic: https://i.imgur.com/gsLFItS.jpg
Schematic with 4 digits volt/ammeter: https://i.imgur.com/W1CaWJ0.jpg

Components list:
The 3 digits volt/ammeter is not available anymore,
new 4 digits volt/ammeter: https://s.click.aliexpress.com/e/_DFO...
5V boost converter: https://s.click.aliexpress.com/e/_AFRdIM
5.5*2.1mm plug (male, 5A, 20AWG): https://s.click.aliexpress.com/e/_DDe...
5.5*2.1mm female connector: https://s.click.aliexpress.com/e/_DBx...
TP4056 charging module: https://s.click.aliexpress.com/e/_9hTxou
Plastic box 70x45x30mm (slightly bigger): https://s.click.aliexpress.com/e/_DCh...

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