1.3-15V Analog Power Supply

Braulio777

This power supply has an output of variable voltage from 1.3 to 15 Volt because it's based on an LM317 regulator in order to obtaining those voltages while a 0-15V Analog Monitor shows those ranges of reading with help of a potentiometer. Go to: http://www.youtube.com/watch?v=nWfUacvEBIw

COMMENTS

StevenJGreenfield
StevenJGreenfield (Apr 14, 2015)
Why is this listing only a 600mA 9V power adapter? It isn't going to be able to put out more than about 7V with a 9V power supply.

This is the power supply listed in the BOM in the builder's guide:
https://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&productId=100175
HIGHVOLTAGE
HIGHVOLTAGE (Jul 26, 2014)
what is its maximum amperage?
StevenJGreenfield (Apr 14, 2015)
The chip is rated at 1.5A at least, however this project only includes a 9V 600mA power supply. So it'll only be able to put out a maximum of about 7V at no more than 600mA.

https://www.fairchildsemi.com/datasheets/LM/LM317.pdf

The power supply listed in the parts list:
https://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&productId=100175

The LM317 has short circuit protection and overtemp protection. I'd use an 18V 2A to 3A power supply with this, as you don't want to use the power supply at its maximum rating. The heat sink included may not be large enough to dissipate the heat generated at maximum current and minimum voltage output. The heat in the LM317 is the product of current and the voltage dropped across it, and the voltage across it is greater when the output is less.