Circuit Project Electronic

LM317 Easy Adjustable Supply Regulator From battery 9V

Here’s how to build a simple LM317 or LM117 or LM217 based power supply. Ladyada.net writes:

“Being able to poke voltages into your projects will help you debug. You can buy an adjustable power supply for $50 or so, or build your own from a kit. You can also build it for $10 using a 9V battery as input and test clips for outputs. This won’t be able to provide a lot of power (cause its just a 9V) but it can go pretty far for testing and debugging.”

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A basic LM317-based power supply -
Read More Source: http://www.ladyada.net/library/equipt/diypsupp.html
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