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Application Notes
Adjustable speeds using potentiometers in series
Replace the speed adjust potentiometer with a single pole, multi-position switch, and
two or more potentiometers in series, with a total series resistance of 10K ohms.
Figure 14 shows a connection for fixed high and low speed adjust potentiometers.
CW
5K
Ω
5K
Ω
CW
LOW
SPEED
HIGH
SPEED
S1
S2
S3
Figure 14. Adjustable Fixed Speeds Using Potentiometers in Series
S3
HIGH
SPEED
CW
CW
5K OHM
5K OHM
LOW
SPEED
S2
S1