Elenco Snap Circuits® Home Learning - Manual (Page 8)

Summary of Parts & Circuit Diagram Symbols
Lamp (L1)
A transducer that converts electrical energy to light. It contains a special wire
that glows bright when a large electric current passes through it. The upper
symbol is used for a lamp providing illumination, for example a car headlamp
or flashlight bulb.
LED (D1)
Light Emitting
Diode
A transducer that converts electrical energy to light.
Resistor
(R1 100 Ω and R5
100k Ω)
A resistor restricts the flow of current through a
circuit.
Photoresistor
(RP)
A resistor whose value changes as light shines on it.
On-Off Switch
(S1)
A mechanical switch that allows current to flow only
when it is in the closed (on) position.
Press Switch
(push-to-connect
S2)
A push switch allows current to flow only when the
button is pressed.
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