Pulse width modulation (NE555) speed controller max. 20W DC motors. Operates on 12V DC. Circuit board 45 x 33 mm.
- The control power can be increased by replacing transistor TR1 with e.g. switch fetish IRF540, IRFZ44 etc.
- workshop tip: if the squealing is annoying, change the 10nF ceramic capacitor at the edge to 1nF
