This temperature activated project kit is also available as a light activated project kit. The output of the board can be used to control other electronic circuits, turning them on automatically when it goes light, dark, hot or cold.

The board has space for an LED with current limit resistor (both available separately) which will light when the output turns on.

The Darlington pair transistor configuration allows an output current of up to half an amp to be controlled. Operating voltage 3V to 10V (lower voltages allow for better adjustment of the switching point).

Possible applications include:

Babies bath over temperature indicator

Automatic fan

Kit contents:

1 x 47Kohm potentiometer

2 x BC337 NPN transistors

1 x thermistor

1 x 220ohm resistor

1 x heat activated switch PCB

Data Sheet