Basic HTML Version
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Flashlamp Circuit
POWER DRIVER BOARD
DRIVE
vee
J125:
!
Floshlomp
~--~---------1X~---------,
680
LS374
Block-XXX
2.7KO
Red-White
J102
F111
J107
+
>-----------~--~------~X~--------~
15,0001"1
1.SKO
POWER
The microprocessor toggles the output of the 74LS374. When point "A" is low, polnt "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 the flashlamp turns On. When point "A" toggles high the circuit shuts Off .
Special (General Purpose) Solenoid Circuit
POWER DRIVER BOARD
J121
!
DRIVE
vee
,..-----------jX
J113
Blue-XXX
680
A
Flashlamp*
or Coil
LS374
2.7KO
F112
J107
F103
Red-White
+
1001"1
SOV
'------------------------------------------------------------------------------------------------------_--_-_-----------'
The microprocessor toggles the output of the 74LS374. When point "A" drops low, point "8" 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 the coil/flashlamp turns On. When
point "A" toggles high the coil/flashlamp turns Off.
'Tieback Diode is not used for flashlamp circuit.
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