The Radioshack, Adjustable, Breadboard Power Supply.

Step 5 The Schematic

This is your basic LM317 Schematic, with the DIP switch and the resistors added(Look at Notes!!):

Comments

[ernie666]

why do u need capacitors?

[jomac_uk]

I like the switch idea, once set up, its a simple matter of selecting the voltage, without having the hassle of connecting up your volt meter, all in all its a good instructable!

[hokie88]

Works great thanks man, I used a dc input source so i got rid of all the diodes and didnt bother with the switch, I wish they made a much larger 8 rocker switch

[Minifig666]

 Would a 12v 2000mA power supply be capable of powering this unit?

[kikiclint]

It gives a maximum voltage about 2 volts below what you put in, so yes it would. You would then have a 10 volt power supply.

[Barney Watches You]

this is an awesome idea! I'm going to make one.

[Unit042]

Clever stuff! Using a series of switches to vary the voltage divider. Usind a dipswitch is fine, but what's wrong with a 10k pot? <br/>My power supply is a mystery transformer outputted to a heavy duty overkill full wave bridge rectifier which goes to a <a rel="nofollow" href="http://www.solarbotics.com/products/lm2937/">LM2937</a>.<br/><br/>I get 12-15v from transformer, and regulated 5v from, well, the regulator. Oh, and don't forget GND!<br/><br/>PS: It may be common knowledge among 'iblers (people who make 'ibles), but is there any way I can see a higher resolution and larger size version of the images i.e. schematics?<br/>

[lifelong-newbie]

You can see some different size scalinngs of the pictures by clicking the i in the top left corner of the pic and selecting the image size you want.

[Unit042]

Cool. Thanks!