c. Microphones and Headphones. Some types of electronic devices
permit audio inputs or outputs.
Audio inputs are typically
accomplished through the use of a microphone.
The symbol for a
microphone is shown in figure 1-35A.
Audio outputs may be produced
by the use of audio indicators such as discussed in paragraph 5e(1)
or through the use of headphones.
Headphones may be single or
double.
The symbols for single and double headphones are shown in
figure 1-35B and 1-35C respectively.
d. Motors.
Many electrical or electronic circuits are affected
by drive motors.
Motors are the electrical opposite of generators
discussed in paragraph 4b.
Motors convert electrical energy to
Like generators, motors may be either AC or DC.
Figure 1-36 shows the symbols for motors.
Figure 1-35.
Microphones, Headsets.
Figure 1-36.
Motors.
PART B - COMPONENT CHARACTERISTICS AND FUNCTIONAL USE
Electrical and electronic circuits are made up of a variety of
circuit
components
selected
for
their
individual
electrical
properties.
These components are arranged and connected within the
circuit to produce the designed output. The schematic diagram is the
road map of the circuit design. The symbols discussed in part A of
this lesson to identify each component used to make up the circuit.
Each component is placed into the circuit
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OD1725
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