Photo Cell - ARK-IoT/ark-hackathon GitHub Wiki
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Photo Cell (CdS photoresistor)
specs
- 5-10KΩ / 200KΩ dark/no light
- Length: 4.46mm/0.18in
- Width: 5mm/0.20in
- Height: 2.09mm/0.08in
- Weight: 0.25g/0.01oz
- https://www.adafruit.com/product/161
To use, connect one side of the photo cell (either one, its symmetric) to power (for example 5V) and the other side to your microcontroller's analog input pin. Then connect a 10K pull-down resistor from that analog pin to ground. The voltage on the pin will be 2.5V or higher when its light out and near ground when its dark. src: adafruit.com
| guide | url |
|---|---|
| Adafruit: Photocell Overview | https://learn.adafruit.com/photocells/overview |
| Sparkfun: Photocell Hookup Guide | https://learn.sparkfun.com/tutorials/photocell-hookup-guide |
| Instructables: Photocell Tutorial | http://www.instructables.com/id/Photocell-tutorial/ |
| digitaldiy.io: Photocell Tutorial | http://digitaldiy.io/articles/electronics/general/269-photocell-tutorial#.WgGIybCnHOQ |