Logic gates representation using the Truth table
Resistors are one of the most used components in a circuit. Most are
color coded, but some have their value in Ohms and their tolerance
printed on them. They are typically marked with an “R” on a circuit
board.
Potentiometers are variable resistors. They normally have their value
marked on them, normally marked with the maimum value in Ohms.
They are typically marked with an “!R” on a circuit board.
"apacitors are also very commonly used. # lot have their values
printed on them, some are marked with $%di&it codes, and a few are
 
"rystals and Oscillators are also fairly easy to identify by si&ht. Most
are clearly marked with their operatin& fre'uency printed on them.
They are typically marked with an “(” or a “)” on a circuit board.
*nductors, also called coils, can be a bit harder to fi&ure out their
values. *f they are color coded, the resources listed for resistors can
help, otherwise a &ood meter that can measure inductance will be
needed. They are typically marked with an “+” on a circuit board.
Relays are typically enclosed in plastic, and many have their specs
printed on them. They are typically marked with an “” on a circuit
board.
Transformers are normally pretty easy to identify by si&ht, and many
have their specs printed on them. They are typically marked with an
“T” on a circuit board.
-atteries are also pretty easy to identify, and are well marked with
their specs.
uses can be easy to identify, and typically have their volta&e and
ampera&e ratin& marked on them.
/emiconductors, such as 0iodes 1typically marked with an “0” on a
circuit board2.
Transistors 1typically marked with an “3” on a circuit board2,
 
*nte&rated "ircuits 1typically marked with an “4” or “*"” on a circuit
board2, can take a little more work to fi&ure out what they are. Many
different types can use the same packa&in&, so they all can5t be
identified by 6ust their looks.
 
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