post-1786374044

My weekend #diy #maker project: a compact, battery-powered #guitar practice amp which is meant to be paired with an effects pedal. It provides a clean 9V power plug for the pedal, and runs off any 10V -> 20V power supply (such as a laptop power supply, or in my case, a 3-cell 21700 battery pack). Internally, the amp uses a TPA3118-based 60W mono class D amp module, a boost converter to supply 24V,…