User Manual

43
SPEEDMASTER™ OPERATION MANUAL
Multiple fixed speeds
Replace the speed adjust potentiometer with series resistors
with a total series resistance of 10K ohms (Figure 21). Add a
single pole, multi-position switch with the correct number of
positions for the desired number of fixed speeds.
S3
S2
S1
R1
R2
R4
T
O
TAL
S
ERIE
S
R
E
S
I
S
TAN
CE
1
0
K
O
HM
S
R3
Figure 21. Multiple Fixed Speeds
Application Notes