Light sensor

Light sensor

Description of the MT-TL from iButtonLink.

(Other light sensors:
UVI -- Ultraviolet Index fom HobbyBoards
Embedded Data Systems plans a light sensor in a future product the EDS0067 and EDS0068)

  • Datasheet for the MT family of sensors.
  • Man page for the underlying DS2438
  • Datasheet for the PDV-P8101 photocell
  • Schematic for sensor
Published photocell characteristics:
Resistance vs Lux
R = 18K - 7.5K * Log10( Lux )

photocell circuit
photocell circuitVad/Vcc = 47K / ( 47K + R )
VAD vs Lux

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