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Step 3The Circuit
The circuit is not very complicated as you see. The LED is connected to an I/O port, the LDR to an ADC port (to enable seeing light differences, not only black and white).
For more details on the circuit see here: Programmable LED.
With my last instructable I got some comments about using the LED as light sensor. Yes, using the LED as a sensor. I gave it a try and it basically worked, I could detect light and shadow.
But I was not able to do use it in a more analog way as I was using the LDR before. At least I was not able.
For more details on the circuit see here: Programmable LED.
With my last instructable I got some comments about using the LED as light sensor. Yes, using the LED as a sensor. I gave it a try and it basically worked, I could detect light and shadow.
But I was not able to do use it in a more analog way as I was using the LDR before. At least I was not able.
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True circuit:
pin1: 10k to vcc
between pin2-3: LDR(best 10k LDR)
between 3-4: 1k resistor
pin4:GND
pin 5 and 6 not connected
pin7: green led by 220 ohm to GND
pin8:vcc
Thank you anyway