3 V Light-Sensitive Circuit Teaching Demonstrator

Show how a light-sensitive component affects a simple circuit with a compact teaching demonstrator. The exposed components and connection terminals let learners follow the arrangement while comparing the response under different light conditions.

Make a light-control lesson easier to follow

• ✅ The visible photoresistor lets learners identify the light-sensitive component directly.
• ✅ Change the light reaching the sensor and observe the circuit response during a demonstration.
• ✅ Use the marked terminals to connect a suitable low-voltage teaching supply.

Educational light-control circuit on a green base. The panel is marked 3 V and carries Chinese component labels. Visible parts include a photoresistor, LED, resistor and transistor. Approximate base dimensions: 7.6 × 3.6 cm. External power supply and connecting leads are not included.

The photographs show the teaching circuit, component labels and example connections; this is a demonstration component rather than a complete automatic lighting installation.

Add a visible light-response experiment to your next circuit lesson.