Activity 28, Light activator – Elenco Snap Circuits® Home Learning User Manual

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Materials List

2 2-Snap Wires
1 3-Snap Wire
1 4-Snap Wire
1 5-Snap Wire
1 6-Snap Wire
1 Battery Holder (B1)
1 LED (D1)
1 NPN Transistor (Q2)
1 100K Ohm Resistor (R5)
1 Slide Switch (S1)

Build the circuit as shown.

Turn on the switch (S1). Does the LED (D1) glow? _________

Use the symbols to draw the circuit here.

Adjust the light on the photoresistor (RP) by covering with your hand. What happens?

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Activity 28

Light Activator