DOE-HDBK-1016/2-93
Electronic Diagrams and Schematics
ELECTRONIC DIAGRAMS, PRINTS, AND SCHEMATICS
Rev. 0
Page 1
PR-04
ELECTRONIC DIAGRAMS,
PRINTS, AND SCHEMATICS
To read and understand an electronic diagram or electronic schematic,
the basic symbols and conventions must be understood.
EO 1.1
IDENTIFY the symbols used on engineering
electronic block diagrams, prints, and schematics, for
the following components.
a.
Fixed resistor
n.
Circuit ground
b.
Variable
o.
Fuse
resistor
p.
Plug
c.
Tapped resistor
q.
Headset
d.
Fixed capacitor
r.
Light bulb
e.
Variable
s.
Silicon controlled rectifier
capacitor
(SCR)
f.
Fixed inductor
t.
Half wave bridge rectifier
g.
Variable
u.
Full wave rectifier
inductor
v.
Oscillator
h.
Diode
w.
Potentiometer
i.
Light emitting
x.
Rheostat
diode (LED)
y.
Antenna
j.
Ammeter
z.
Amplifier
k.
Voltmeter
aa.
PNP and NPN transistors
l.
Wattmeter
bb.
Junction
m.
Chassis ground
EO 1.2
STATE the purpose of a block diagram and an
electronic schematic diagram.
Introduction
Electronic prints fall into two basic categories, electronic schematics and block diagrams.
Electronic schematics represent the most detailed category of electronic drawings. They depict
every component in a circuit, the component's technical information (such as its ratings), and
how each component is wired into the circuit. Block diagrams are the simplest type of drawing.
As the name implies, block diagrams represent any part, component, or system as a simple
geometric shape, with each block capable of representing a single component (such as a relay)
or an entire system. The intended use of the drawing dictates the level of detail provided by
