/diy/ - Do It Yourself

>>1528942
>>1528946
thanks.

>>1518467
>oscilate
Ok, managed to fix that piece of shit of psu, apparently it`s good at full load and has a ~1V dropout at 25V and 2A. Tested it with a 1100w universal motor, as expected it got really toasty at 2A with the ANCIENT pnp power transistor I got from a tube tv (I`m using it because I`m retarded and blew 2 of the good TIPs I had bought). This is my first project so far I`ve learned:
>plan ahead, deciding to make the power stage on a separate PCB was a good decision, because I knew I`d screw up in the controls
>osciloscope probes are shorted, sparky
>making over complicated transistor and opamp equivalent circuits was a waste of time, to fix the oscilations I had to try diferent capacitors to see which one worked better
>always test ICs before starting other shit to avoid wasting 5 hours troubleshooting
>don`t go crazy with PCB complexity because I have to hand-draw them or make in a perfboard
>always check if the .1F capacitor bank is discharged before handling

>scavange transformer
>nice, this will do for my psu
>two 16v coils and one 4 v
>want to make a 0-30v supply
>all coils in series
>36v
>lm324 and lm358 which were the opamps I`d be using are 32v max
welp

>>1496661
>>1497053
U2B is a comparator that checks the current through the one ohm resistor and the set point.
But that isn`t a switched mode power supply, I don`t even know how to make a linear one yet.
t. guy that made the thing.

Guys, how would I improve the design and make the thing saturate at the current setpoint instead of shitting itselft?

>>1408701
You may ask, why two transistors? And I don`t know. It just seems safer.

>>1333794
duuuuudeee i just thougt about something