Velleman LAB-1 Mod
Here is a simple mod for 3 in 1 Soldering Station, Regulated DC Power Supply and Digital Multimeter – Velleman LAB-1. Multimeter module is operated using 9V battery that we don’t want to use. But how to replace it? Well, we can use Regulated Power Supply module instead of a battery, but that could disrupt operating of this module and can cause voltage drops when we use it for powering some other circuits. But there is another possibility, we can use power from Multimeter LCD backlight socket, unfortunately it’s 9V AC. So we just need to convert AC to DC,