Thanks, do I need to keep D2 too?
Also I want to drive a motor with PWM using this power supply and I want to power 1W LED (will use anohter LM338 for it). Is it OK?
Will the LED be stable if it is powered from the same power supply as motor?
LED is rated at 3W 700mA but I'll run at 1W 350mA to make shine not so bright.
The motor is 12V or 24V don't know as I salvaged it from a printer. I measured the current drawn by motor when connected to computer PSU 12V ant it was 0.3 to 1Amp including PWM controller.
Is there a difference will I adjust TR1 or R1?
I have resistors for R1 250R (multiturn) and 2K2 for TR1. This gives me 12.25V
I mean can I adjust R1 instead of TR1?