Panel Meter
From TheAnalogThing
A third party voltage instrument is part of The Analog Thing. It is located in the lower left on the upper board and a central part of the board. Unfortunately it is not analog but digital, in order to be cheap (price around 5 Euro). The instrument is a PM438 and normally shows the voltage on the output channel U.
The instrument can show bipolar voltages, i.e. it can show values in the whole logic level domain of ±1.
