/diy/ - Do It Yourself

>>1236564
>an adjustable power supply. something under 20$

not going to get much for that.

adjustable power supplies are a luxury that you seldom really need. for an arduino you can get one or more DC power adapters and do lots of things. Seldom do you really need to turn a knob and change your power supply from 10 volts to 11 volts, or similar.

also, they make DC power adapters with a switch that changes from about 3 volts up to 15 or so, and these are inexpensive as well. regulated power supplies cost more, but again, you can do lots of things with unregulated adapters.