Hi there all. I have a project which involves sampling the light blocking properties of photoresistors. I have a photo resistor, and an LED. The LED brightness changes, and the desire is that a serial analogue read from the photoresistor returns the brightness of the LED. This way i can acquire da…

Photo resistor reading LED brightness: noise?

OllyR October 24, 2012, 10:13pm 5

so if it is being bathed in a half power glow of an LED powered by arduino PWM, it should pick up the overall light level surely?

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