C chrisjw24 New Member Today at 11:45 AM #1 I want to use one centre tap 12 - 0 -12 transformer to power amp (lm1875 stereo) and a small pre amp board but I also need a 5v dc supply. what is best configuration for this. Thanks
I want to use one centre tap 12 - 0 -12 transformer to power amp (lm1875 stereo) and a small pre amp board but I also need a 5v dc supply. what is best configuration for this. Thanks
D Diver300 Well-Known Member Most Helpful Member Today at 12:35 PM #2 Just run a 5 V regulator from the 12 V supply. Alternatives include:- Have a completely separate power supply Use a switch-mode regulator (more efficient but potentially more electrical noise) Wind another winding for the 5 V supply onto the existing transformer. (See https://www.electro-tech-online.com/threads/kef-psw2500-active-base-unit-repair.159244/#post-1380354 as an example of adding a winding)
Just run a 5 V regulator from the 12 V supply. Alternatives include:- Have a completely separate power supply Use a switch-mode regulator (more efficient but potentially more electrical noise) Wind another winding for the 5 V supply onto the existing transformer. (See https://www.electro-tech-online.com/threads/kef-psw2500-active-base-unit-repair.159244/#post-1380354 as an example of adding a winding)