Download Schematic symbols Diode: allows flow of electricity in only one

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Schematic symbols
Diode: allows flow of electricity in only one direction
Gnd, -
LED: remember they are polarized the long leg is +, the short one –
Power supply: the positive side of your battery for example.
Resistors: they convert energy into heat. Rated in Ohm
Switch: interrupt a circuit
Variable resistor: all analogue sensors, e.g. a temperature sensor
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