Page 122 - No Good Gophers

HIGH POWER SOLENOID CIRCUIT
J 116I :
r-~~~---'!P-36-C~~~'-V-iO-let---Xx-X--~
f'--+--
I
I
I
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I _l_ I
I Power ~ - I
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+ Red-Brown
POWER D:;:iVER BOARD COIL
;108
I-----<;~
D22 I 0210
lOOml;
100V i
?f\
Ji33 I
The microprocessor toggles the output of the 74LS374. When point "An is low, point "B", the collector of
the 2N5401 transistor, is high. A high at point "B" causes point "C", the collector of the TIP102 transistor
and point "D", the emitter of the TIP36C transistor, to drop low. When point "D" is low, the coil is
grounded through the transistor and turns on. The coil shuts off when point "An toggles high.
COIL
Brown-XXX
t:~K
1
5 l_~D I
~ -'- I
I [-'ower -=- -=- I
L _
+ r + 50V J133
F102 Red-Slock
6 f ----,
100m!i
100V
/i\
The microprocessor toggles the output of the 74LS374. When point "A" is low, point "B", the collector of
the 2N5401 transistor, is high. A high at point "8" turns on the TIP102 transistor and causes point "C" to
drop low. When point "C" is low the coil is grounded through the transistor and turns on. The coil shuts
off when point "A" toggles high.
3-8