Does anyone have a good guide to reading circuit boards? I know the basics (C is cap, D is Diode, etc), but a link to a comprehensive guide might be good for the forum as a whole.
Note that all these prefixes are totally arbitrary and are chosen (generally) by the circuit designer. However, they are reasonably common and standarized. Some are also required to be right (R, C, L) if the circuit is run through the SPICE simulator.
Here's at least some common ones:
C - Capacitor (CT or even TC is very occasionally used to specify a tantalum capacitor)
CN or CON - Connector
D - Diode
FB - Ferrite Bead (a type of inductor, so L is also sometimes used)
F or LF - Sometimes used for an integrated, multi-component filter (e.g. a capacitor with ferrites on its legs)
J - Jumper (wire or 0ohm "resistor") or sometimes a connector
L - Inductor or coil
M - MOSFET (sometimes Q is also used for MOSFETs)
P - Connector
Q - Transistor (bipolar junction or field effect)
R - Resistor
S or SW - Switch
T - Transformer, coupled coil structure or very occasionally transistor
U - Integrated circuit
VR - Variable resistor or potentiometer (R is also frequently used)
V - Vacuum tube
W - Wire jumper or sometimes an inductor
X or Y - Crystal