ElectronicsClass
From HacDC Wiki
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?
- metering modes
- 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]