Hi all I want to measuer the volts in an led lamp, this lamp is increasing in time the voltage whit PWM (analogwrite()) The mesure taken is not the correct one and always whiout decimal values. its possible? any suggestion, or brillant idea? code sensorValue = analogRead(sensorPin); sensorValu…

How to measure led volts whit analogread()

system April 1, 2012, 4:49pm 10

Don't you need some connection to ground? Doesn't analogRead() measure voltage relative to ground?

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