Page 133 - Safe Cracker

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Drive

Jl09

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Power

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The microprocessor toggles the output of the 74LS374. When paint "A" is low, point "8" the collector of

the 2N5401 transistor, is high. A high at point "8" causes a low at paint "C". When point "C" is low, the

coiVflashlamp is grounded through the transistor and turns on. When point "A" toggles high the

coil/flashlamp turns off.

*

Tieback diode is not used for flashlamp circuit.

SPECIAL (GENERAL PURPOSE) SOLENOID CIRCUIT

POWER DRIVER BOARD

FLASHER

or

COIL

J128

lOami

100V

+

Red -Wh ite

D19

D21

FLASHLAMP CIRCUIT

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4.7K

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47D

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Power

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Block-XXX

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:FLASHER

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Red-Wh ite

POWER DRIVER B'OARD

J12B

01B

+

The microprocessor toggles the output of the 74LS374. When point "A" is low, paint "8" the collector of

the 2N5401 transistor, is high. Once point "B" is high, point "C" the collector of the TIP102 transistor is

low. When point "C" is low, the flashlamp is grounded through the transistor and turns on. When point

"A" toggles high, the current shuts off.

3-9

Planetary Pinball Supply, Inc