How to make a mains voltmeter from an old phone charger case

If you often need to monitor the network voltage, then you will agree that doing this constantly with a multimeter is not very convenient.

For these purposes, you can make a voltmeter, which, like a plug, will be inserted into a socket and visually displays the network voltage. On Ali Express you can buy a ready-made, built-in AC voltmeter. All that remains is to build it into the case from charging.

Will need

• Built-in voltmeter -
  
• Old phone charger.

Making a network voltmeter

We take a cell phone charger.

Let's analyze it. Unsolder the wires from the board. Drill a small hole in the center of the lid.

Next, we increase it to the size of the voltmeter.

Insert the voltmeter into the hole and tighten it with a nut.

We connect the wires from the charging plug and fix them with screws. We assemble the body.

Our network voltmeter is ready.


Ali Express also has ready-made voltage meters in the form of a plug, but unlike the module, they are 4-5 times more expensive.

Watch the video