- Joined Mar 19, 2019
Considering building this. Not really sure it is necessary but it is something to do. Found this circuit intended for 220/12V 50Hz and planning on using a Triad F-25X 120/12/6V 60Hz transformer in a small project box. Added fuse and input on/off switch. The circuit was for 12V secondary and I added selector switch to utilize the Triad's secondary center tap for 6V. I also see some circuits using for R2 a 10K pot to attenuate current? Is it needed? Comments and advice welcomed.