Photoresist SPIO (ME-00037-1A)

ABOUT
The Magzor Photoresist SPIO is a breakout board with a sensor that will give you a varying analog signal as the level of ambient light changes. The board is great if you want to see if the light is off in a room, or if you want to automatically turn on some outdoor lights after dark. The board has a standard 3-pin header with pins for power and signal out; just hook up to an analog input and you're ready to go!

Power
The photocell can accept input up to 150 V, however, we recommend limiting input to the breakout board to 12 V (after all, anything above this would really be wasting power). We typically operate the board at 3.3 to 5 V for our testing.

Connectors
The board has a standard 3-pin SPIO sensor header with VCC, GND, and SIG pins.

Pins

 * VCC: Power to the board
 * GND
 * SIG: Signal output from the sensor. The photocell is arranged in a typical voltage divider circuit.  The signal approaches VCC as the photocell resistance drops and approaches GND as the resistance increases.  The resistance of the photocell decreases with increasing luminescence and vice-versa.

PDV-P9007 Photocell
The PDV-P9007 photoresistor operates within a spectral range between 400nm and 700nm and has a peak response at the 570nm wavelength. The resistance of the sensor varies from 10kOhm at maximum illumination and 100kOhm at minimum illumination with 1MOhm dark resistance.