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ElectronicsClass

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Revision as of 16:46, 6 January 2009 by Ashfixit (talk | contribs) (→‎Wire)

Electronics Class

This class is targeted at the beginner who wants to learn electronics. It would make a fine prerequisite to the AVRMicrcontrolerClass or the HAMClass

Required Materials

  • Soldering Iron (25-30w)
  • Solder ( 22ga )
  • Bread Board ( or AshClassBoard )
  • wire 24ga
  • Blue smoke lab 0 30ga solid core wire.
  • Resistors 10kohm
  • variable resistor 10kohm linear
  • switch
  • leds (various)
  • pn2222 transistor
  • lm386 audio amplifier ic
  • 1/8 male phono jack

Class Topics

  • Read The Fine Manual: They hide the secrets in the documentation.

Metering

There are many like it but this one is mine.
  • Naming of parts
    • metering modes
      • restistance - Ohms of resistance
      • voltage - Volts
      • Current - Amps/Milliamps - check the leads
      • diode check - see [Diodes]
    • leads - plugged into the right ports?
  • Continuity testing
    • set the meter to the lowest resistance mode (200ohms or auto resistance)
    • reads "off scale" when the leads are unconnected, this is an open circuit
    • reads near 0 if the leads are crossed

Soldering

Heat, beat and treat: Soldering ( for our purposes ) is the process of joining electrical contacts with a low melting point metal to make a mechanically and electrically strong connection.

  • Restrain long hair/clothing/jewelry.
  • Clean both parts of waxes, oils or debris.
  • Mechanically fit connections together
  • Clean and wet the iron
  • Heat both parts until hot
  • Apply just enough solder to wet the contact surfaces
  • Wait for the connection to shine smoothly
  • remove the iron an test the connection
    • the meter should find near 0 ohms of resistance between the two parts even when mechanically stressed.
    • the meter should read "off scale" to everything that should be isolated

Switch

  • use the meter to diagram the electrical layout of the switch.
  • solder the switch to the board.

Wire

The basic wire is a pipe through which electrons can flow from the lowest voltage side to the highest. (conventional current huh? [1]). This works up to the physical limits of the wire

  • Current limit via wire gauge [2]
  • Voltage limit via insulation.
BlueSmokeLab
  • turn off the switch
  • Solder the 30ga wire ends on to the lab 0 area
  • stow fingers away from wire
  • turn on switch

Resistor

Resistance = Ohms
[Ohm's law[3]]

Light Emitting Diode

Motor

Diode

Capacitor

Transistor

PN2222 N channel transistor

IC

LM386 Audio Amplifier [4]