Quick Regulated Power Supply

I built this Power Supply for quick multiple voltage bench top Supply, for testing of LEDs & circuit's. I used the first lm2596 too produce the 5 volt up to 3 amps and the second lm2596 for a 12 volt reference voltage controlling the transistor for the 5 amp regulated output. I built the Power Supply inside a deep single switch plastic electrical (handy) box. After construction and 3 hour load testing of transformer and circuit's, the heat started building up in the small plastic project box. I stopped the test and added a small 5 volt fan to move some air around the transformer. I resume the load testing for 6 more hours with no problems or heat build up. Parts used: 1-3055 transistor 2-lm2596 dc to DC buck converter. 1-2x4 electrical box extra deep size. 1-2x4 box cover 1-240v to 24v air conditioning Transformer. (This is powered by a 125v outlet) 1-5 position terminal strip. ( a output for testing circuit's) 1-small fan to remove heat from the box.

published 9 years ago