LED Sensor / LED センサ

This movie illustrates that a light emitting diode can also work as a photodiode. By rapidly (in 1ms intervals) changing its polarity you "charge" the diode and after ~20ms you can poll I/O for state. The light is the trigger for charging the LED.

Category:

Science & Technology

Tags:

• LED
• sensor
• robot
• センサ
• ロボット

[DrNeoElectro]

I have a question,

the LED is blinking, is that because you are using the LED as source and sensor? thanks in advance

[mog123noblog]

Sorry for the long wait for a reply, I was on holiday to England. Back on topic: The led's blinking because approx. half of the time it's polarised backwards, and the other half it's polarised properly. When it's polarised backwards the LED doesn't emit any light. I hope that is the answer you wanted. If you need more help, just ask.

[DrNeoElectro]

No problem, and I wish you had a good one :)

I think i got the idea, you are doing whats in this picture, i guess:

blog. makezine. com/ order .jpg

[mog123noblog]

Exactly, that's the pic I was basing my program at.

[mixerskate]

dobra wierze;p

[mog123noblog]

no, mam nadzieje ;p

[DrNeoElectro]

Alright, TYVM!

[mog123noblog]

No, this is all based on montage capacities.

You don't hi-z just for the fun of it, you automatically go hi-z(change to input and read the voltage). I can send you the code and an image that illustrates the idea. Somehow I can't upload a comment with a link in it.