Activity 26, Led night light – Elenco Snap Circuits® Home Learning User Manual
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Materials List
1 2-Snap Wire
2 3-Snap Wires
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 Photoresistor (RP)
1 Slide Switch (S1)
Build the circuit as shown. Cover the RP Photo Resistor with a piece of paper. Turn the switch on. What happened?
______________________________________________________________________________________________________
Remove the paper over RP and place the unit in the light. What happens?
______________________________________________________________________________________________________
Place the circuit in a dark room. What happens? _____________________________________________
Turn on the room light. What Happens? ___________________________________________________
Is this circuit similar to an automatic night light? ____________
Activity 26
LED Night Light
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