Datasheet

J5 – Connects LDR to channel 0 (AIN0)
J4 – Connects thermistor to channel 1 (AIN1)
J6 – Connects the potentiometer to channel 3 (AIN3)
Note that channel 2 (AIN2) does not have an alternate purpose, so no jumper is
necessary.
LDR – The Light Detecting Resistor (LDR) can detect basic
changes in the intensity of the light striking it.
A decrease in the amount of light hitting the sensor will cause an increase in the
voltage on channel 0.
The LDR is useful for detecting larger changes in light or differentiating between
night and day. The value read is a relative number rather than an absolute light
intensity value.
Thermistor – The thermistor is a resistor that changes
resistance based on temperature.
A decrease in temperature will cause the voltage to increase on channel 1.
The thermistor is useful for detecting changes in temperature. Since the
specification of the thermistor is not known so it is difficult to use it to measure the
actual temperature. It is better suited for measuring relative changes in
temperature and in some cases the readings can be correlated to a temperature by
empirical testing.