Hi, I got these situation, I conect my arduino to an optoacoplator, by using PWM, I'll show you the code I'm using, but the strange thing is when I measure the voltage between pwm pin and gnd it is 1,64V when the pwm is at 100%, shouldnt it be at 5V? #define MOTOR 11 #define RECARGA 3 int POT; i…

LOW Voltage on PWM

system September 4, 2012, 7:44pm 6

You NEED a current-limiting resistor.

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