On Fri, 5 Dec 2008 19:33:40 -0500, "gore"
wrote:

I work at an electronics contract manufacturimg facility. We do work for
several companies and I wonder why they use different labels on the
schematics and pcb's to refer to IC's. Some of them have a U1, an A1, and
X1, or an IC1. Why do they do this? Is there a standard used to label IC's
in a schematic? Just curious why this is.

Thanks



U = IC

Q = transistor

D = diode (CR is archaic)

T = transformer

L = inductor

A = assembly

R = resistor (all kinds)

C = capacitor (ditto)

P, J are connectors

B = battery

F = fuse

K = relay

S = switch

V = tube


IC, CON, HDR, TR, VR, CHO, RN, RV, RLY, SW, LED and such are all
amateur inventions.


John