how do i modify this circuit so i can control it with a PWM signal from the arduino instead of the 555 Timer IC ? [555-Timer-IC.jpg] [High-Frequency-Tens-Machine-Wave-Asymmetrical-.jpg]

TENS modification

Grumpy_Mike March 28, 2012, 4:44pm 2

Take the first circuit on this page:-
http://www.thebox.myzen.co.uk/Workshop/Motors_1.html
Remove the diode and the motor and substitute your two pads and resistor / LED.

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