Mini Voltmeter
thingiverse
Simple Digital Voltmeter (0-30V) Check out this affordable voltmeter on Amazon: https://www.amazon.com/MCIGICM-Voltage-2-5V-30V-Digital-Voltmeter/dp/B07Q2RQYPJ/ref=sr_1_36?crid=340PVD3H1AIR6&qid=1568107519&s=gateway&sprefix=voltm%2Caps%2C236&sr=8-36 To link the probe with the positive pin, connect the red wire and yellow wire on the switch in proper order.
Download Model from thingiverse
With this file you will be able to print Mini Voltmeter with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Mini Voltmeter.