Sverre Holm made his own powerpole voltage and current meters:
Powerpole voltage and current monitoring is quite nice to have. One can buy commercial meters, but due to the availability of nice and cheap modules, it is very easy to make them oneself.
To the right you’ll see my combined voltage and current meter as well as my volt-meter on top of the power supply.
More info at LA3ZA Radio & Electronics.
