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January 14th, 2014

14/1/2014

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Notes on Electronics
electronics.pdf
File Size: 890 kb
File Type: pdf
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JUNIOR CERT SCIENCE - ELECTRONICS
  • Electronics is the control of small electric currents.

Diodes
  • A diode is a component that allows electricity to flow in one direction only.

LEDs
  • LED stands for light emitting diode.
  • An LED is a diode that gives out light when electricity flows through it.
  • LEDs use less current than a bulb.
  • LEDs are used in calculators and fridges.

LDR
  • LDR stands for light dependant resistor.
  • An LDR is a resistor whose resistance depends on the amount of light.
  • The resistance of an LDR decreases as the light increases.
  • LDRs are used in street lighting and cameras.
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