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PHOTOCELL |
 | | Photocells need some calibration to be responsive in the exact lighting scenario you have. |
| | The number box on the bottom passes on the value from the photocell to be used in your application. |
| | Photocells can be used in place of keys on a specialized keyboard of your design. |
| www.makingthings.com /teleo/teleo/cookbook/photocell.htm (896 words) |
