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Variable power supply?
Is there a fairly simple circuit, method to making a desktop power supply running on 240v a.c mains supply with a user controlled variable output say 0-24v D.C with variable ampage upto say 1 amp. I may be over simplicating thing in my head but is it just a case of a transformer taking my mains input down to the upper most requirement ( 24v @ 1amp ) on the output, and the using some type of variable resitors on the output to further restrict the output to my requirement. I would be grateful for any guidance and information on this topic. Thanks to the community in advance.
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Best Answer 11 years ago
You can use one of those or search for some on Instructables:
https://www.instructables.com/id/How-to-Build-a-Bench-Top-Power-Supply/
https://www.instructables.com/id/The-Radioshack%2c-Adjustable%2c-Breadboard-Power-Suppl/
https://www.instructables.com/id/Power_Supply/
https://www.instructables.com/tag/?q=power+supply&limit%3Atype%3Aid=on&type%3Aid=on&type%3Auser=on&type%3Acomment=on&type%3Agroup=on&type%3AforumTopic=on&type%3AforumTopic=on&sort=none