Basic HTML Version
FLASHLAMP CIRCUIT
~
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,ClOWER DRIVER BOARD
Drive
vee
FLAS H :__AM P
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Power
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Red-W-li-,c
The microprocessor toggles the output of the 74LS374. When point ~A" is low, point "8" the collector of
the 2N5401 transistor, is high. Once point "8" is high, point "C" the collector of the TI P102 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.
SPECIAL (GENERAL PURPOSE) SOLENOID CIRCUIT
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--=- --;-
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POW=-R uRVE,,\
BOARD
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Drive
vee
x
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I
I
FLASYI_AMP
or
COIL
Blee-XXX
J10J
I" 12
,
...
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J1D6
or
J1D7
+
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pow':r '-
; :: :P ""
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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" 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 flashlamp circuit.
3-9