I need +/- power supply circuit with coarse, fine & curr

[aghielan]

power supply lab circuit ds

Anyone do have positive and negative power supply circuit for 0-30v with corse, fine and also current adjustment? Please help me on this. Thanks in advance.

 

[Fawad Elahi]

0-30v power supply using lm117

for a power supply you only need
1. a rectifier
2. then a current limiting resistor
3. a capacitor
4. an inductor
5. a load resistor

 

[rx5]

Power Supply Circuit

try **googling** it , my friend... there are LOTS out there...

 

[rowokii]

Power Supply Circuit

What you are describing is a lab power supply. Here's one that does 0-30v with current limit:
http://www.electronics-lab.com/projects/power/003/index.html

However, you can make a much simpler one if you are willing to live with 1.25-13v or so. Try searching for LM317 (positive) and LM337 (negative) linear regulator and look at the datasheet for example circuits, such as here: **broken link removed**

It shows you things like how to make the circuit work from 0-30V, add current limits and so on... but linear regulators are going to waste a lot of power with such a wide voltage range. A good power supply design that work over that wide a range is complicated.... I strongly recommend you to see if you can live with something a bit more modest to start off.

 

[aghielan]

Re: Power Supply Circuit

hi all, thanks for the info.