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| MORE ON LIGHT EMITTING DIODES (LEDs) |
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| Various shapes and sizes of LEDs are available. Five standard types are shown below. |
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| PCB MOUNTED LEDs |
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| The circuit shown below has three components and a battery (power source). A toggle switch (or slide switch), a resistor to protect the LED and a standard LED. The resistor is vital because a 9 volt battery is being used. Without a resistor the LED would ‘blow’. |
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| Circuit diagram Dia A, is exactly how the circuit looks, when drawn with circuit wizard software, on a computer. Dia B shows the software in simulation mode. |
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| CIRCUIT DIAGRAM MODE (CIRCUIT WIZARD SOFTWARE) |
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