Page 168 - Cirqus Voltaire

HIGH POWER SOLENOID CIRCUIT
I ~~ - - - -- - ------- - - - - - ~~-- -I
I Drive lN4004 I
vee I
Violet-XXX
I
I
I
I
I COIL
I
I
I
J133 I
Red-Brown
POWER DRIVER BOARD
J128
+
1
I
I
I
I
I Power - _ - - I L ~ ~
D19 D21
100rM
10DV
The microprocessor toggles the output of the 74LS374. When point "A" is low, point "8", the collector of
the 2N5401 transistor, is high. A high at point "S" causes point "C", the collector of the TIP102 transistor
and point "0", 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 "A" toggles high.
LOW POWER SOLENOID CIRCUIT
I- ~--- - ----- - - - ----------lDrive vee I
+50V
I
I
J128 COIL
Brown-XXX
POWER DRIVER BOARD
Fl0B
Red -Block
The microprocessor toggles the output of the 74LS374. When point "A" is low, point "8", the collector of
the 2N5401 transistor, is high. A high at point "8" turns on the TIP1 02 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.
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