Voltage converter in 3D printed casing I’m using Yamaha THR5 electric guitar amplifier. It’s possible to power it with batteries. It isn’t economically good solution though. Something rechargeable would be way better. Since I had a Li-Po battery lying around I made a small dongle which regulates the voltage. Voltage converter in 3D printed casing The dongle in a 3D printed casing. Two switches allow breaking input and output circuit independently.
