Principle

The resistance value of an NTC resistor is dependent on the temperature. In this experiment, a circuit is examined in which a transistor is triggered with an NTC resistor and switches a filament lamp on and off.
The NTC resistor, the potentiometer andvthe 10 k Ω resistor form a temperature dependent potential divider, from which the control voltage of a transistor is picked up. In order to realise both a light circuit and a dark circuit without a relay, the NTC resistor is inserted at various positions in the potential divider.

Benefits

• No additional cable connections between the building blocks needed - clear arragned and quick setup
• Contact saftey due to puzzle blocks system
• Corrosion-free gold plated contacts
• Doubled earning sucess: Electric circuit diagram on top, real components can be seen unterside

Tasks

How does a transistor temperature switch work?

Examine how a transistor can be triggered with a temperature dependent resistor to switch a lamp.