Subscribe to Arduino Academy and start learning today for FREE!

Constant Current, or Constant Voltage?

I needed a Constant Current power supply for my bench. Now I don’t know if you have priced bench power supplies lately, but they can be several hundred dollars. Not any more! Would you believe a 40v 3a adjustable voltage or current supply for about $20?
https://amzn.to/2MNnOcc
I grabbed a used 24vac HVAC transformer, soldered a bridge rectifier on top, and fed the input on this board. I put a 300ma 1w LED on the output, and I’m controlling the brightness by controlling the current, even down to 2ma (dim), all the way up to 300ma (blindingly bright). I could go higher, up to 3000ma, but that will let the magic smoke out.

Become the Maker you were born to be. Try Arduino Academy for FREE!

 

Subscribe
Notify of
guest
0 Comments
Inline Feedbacks
View all comments

Archives

0
Would love your thoughts, please comment.x
()
x