Page 99 - Attack From Mars

SPECIAL (GENERAL PURPOSE) SOLENOID CIRCUIT
~-- --- --- - - - --- - - - --- - - - -~D r i v e vee .1109 I
LS37 4 Fl 1N4004 ~ X 1 , -~ B -J U - c .- - X-XX --- -- - - ;
'[}ll0~ nA 4~7Ki ,J TIP102 I : i J -----'VV'- MPSD52 68 - -- 1
470 I
. B 1N4004 2~
POWER DRIVER BOARD -
FLASHERor
C81~
100mf 'l
100_V_, _
~
IF
Red-White J J
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I Power I L ~
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 "B" causes a low at point "C". When point "C" is low, the
coil/flashlamp is grounded through the transistor and turns on. When point "A" toggles high the
coil/flashlamp turns off.
* Tieback diode is not used for flash lamp circuit.
+
FLASHLAMP CIRCUIT
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I
I ~ 1 ~D I L Power ~ J I _______ ________________ _ J
The microprocessor toggles the output of the 74LS374. When point "A" is low, point "B" the collector of
the 2N5401 transistor, is high. Once point "8" is high, point "C" the collector of the TIP102 transistor is
low. When point "C" is low, the fiashlamp is grounded through the transistor and turns on. When point "A"
toggles high, the current shuts off.
D1S
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