The Potmeter is on the top left. turning it to the right will up the voltage, memory serving me well. To the left down. If I forgot, then it is the other way round wink It was about a quarter turn for me to the right to move it from 5 to 5.2.

A voltmeter is something you can purchase in any diy shop smile . It comes with a dial which you need to set to i.e. 10V (DC) and 2 measuring pins of which you put the black one on the black wire and the red one on the red wire. smile

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