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 Post subject: Beginner's Electronics
PostPosted: Sat Dec 29, 2012 1:56 pm 
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Joined: Fri Nov 30, 2012 1:54 pm
Posts: 275
Application
An open source app to help you design circuit boards.
http://fritzing.org/
Available for os X, Windows, and Linux.
http://www.youtube.com/watch?v=Hxhd4HKr ... r_embedded



Ohm's Law

Quote:
I = V/R


If you know this formula, you can pretty much can do anything with electronics. It's the basis for all electronics and electrical calculations. If you remember this, you can figure out what size resistor to pair with an LED, how to control the speed of a motor, how to build a power supply, and more. There are three main variables in electricity, (I) current (amps), (V) voltage (volts) and (R) resistance (ohms).

There's also a 4th element, (P) power (watts).
Quote:
P = V*I
P = R*I2
P = V2/R


Quote:
V = R*I
V = P/I
V = P*R


Quote:
R = V/I
R = V2/P
R = P/I2


Quote:
I = P/V
I = V/R
I = P/R


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PostPosted: Sat Dec 29, 2012 8:51 pm 
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Site Admin

Joined: Fri Nov 30, 2012 1:54 pm
Posts: 275
Symbol quick reference

Attachment:
battery.jpg
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Battery



Attachment:
capacitor.jpg
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Capacitor
A capacitor (originally known as condenser) is a passive two-terminal electrical component used to store energy in an electric field.



Attachment:
diode.jpg
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Diode
a diode is a two-terminal electronic component with an asymmetric transfer characteristic, with low (ideally zero) resistance to current flow in one direction, and high (ideally infinite) resistance in the other; like a a check valve.



Attachment:
fuse.jpg
fuse.jpg [ 2.64 KiB | Viewed 3956 times ]

Fuse



Attachment:
ground.jpg
ground.jpg [ 1.63 KiB | Viewed 3956 times ]

Ground



Attachment:
led.jpg
led.jpg [ 3.23 KiB | Viewed 3956 times ]

LED



Attachment:
motor.jpg
motor.jpg [ 4.19 KiB | Viewed 3956 times ]

Motor



Attachment:
potentiometer.jpg
potentiometer.jpg [ 2.96 KiB | Viewed 3956 times ]

Potentiometer



Attachment:
power.jpg
power.jpg [ 1.88 KiB | Viewed 3956 times ]

Power



Attachment:
power_plug.jpg
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Power plug



Attachment:
resistor.jpg
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Resistor
A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element.



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switch.jpg
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Switch



Attachment:
npn_transistor.jpg
npn_transistor.jpg [ 2.99 KiB | Viewed 3965 times ]

NPN transistor



Attachment:
pnp_transistor.jpg
pnp_transistor.jpg [ 2.78 KiB | Viewed 3965 times ]

PNP transistor


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