Home › Forums › Microcontrollers › object counter › Reply To: object counter November 11, 2014 at 11:22 am #9807 Ligo GeorgeKeymaster Hello, Sorry for the delay in reply. You may also sense the LED status by using Photo diode. It is the best method. Or You can take the voltage across LED. Use a Transistor as a Switch to boost the voltage to 5v.