MIAB
Newbie level 5
Is it possible to add two potentiometers to this circuit to be able to adjust frequency and duty cycle of this PWM circuit. At connector 13 (bottom) there is connected a 3 way (on-off-on) switch. When switched to 1+2 it is 2 cycles/s. When 2+3 it is no pulsing with 0 cycles/s. When switch in middle position (only 2) it is 200 cycles/s. This is in an Ac/Dc tig welder. I would like to be able to vary the pulses from 2-200 and better yet 0.1-200/second.
Thank you
Thank you
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