Voltmeter/Ammeter for fischertechnik
thingiverse
Housing for a cheap volt-/amperemeter from aliexpress for fischertechnik. Compare the images, there are a couple of similar variants. Note that the ammeter's precision is only 10mA and it will start measuring amperage only from 20mA upwards.Remove the housing, cut the PCB's two side flanges, and desolder the white connectors. Solder the four fischertechnik Bundhülsen to the PCB according to the "share power source" / "direct power supply" wiring option, which will make it usable only above 4V, though.
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