Page 138 - Tales of the Arabian Nights

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Violet-XXX
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HIGH POWER SOLENOID CIRCUIT
POWER DRIVER BOARD COIL
019
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+
100m!
100V
021
The microprocessor toggles the output of the 74LS374. When point "A" is low, point "S", the collector of the 2N5401
transistor, is high. A high at point "S" 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 "A" toggles high.
LOW POWER SOLENOID CIRCUIT
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+50V
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Power ~ ~ L J
Brown-XXX
POWER DRIVER BOARD COIL
F108
D21
1DOmi
100V
Red-Black
The microprocessor toggles the output of the 74LS374. When point "A" is low, point "S", the collector of the 2N5401
transistor, is high. A high at point "S" 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.
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