9V battery holder with switch & 2.1mm plug -

Blog posts tagged with Useful stuff:

Hooray, the breadboard power supply from Adafruit…
Catbus has a nice review of our new breadboard power supply kit… Hooray, the breadboard power supply from Adafruit is put together and working. I look forward to not clawing my face off in frustration every time I have to ******* breadboard anything requiring power.

Adjustable breadboard power supply kit
Breadboard supply A very low dropout adjustable power supply! This project details the design of a very low dropout adjustable power supply. A good power supply is essential to electronic projects. While there are many existing designs for adjustable power supplies, this one makes improvements that make it more useful for hobby designs MIC2941 regulator has read more...