Basic HTML Version
Flashlamp Circuit
, POWER DRIVER BOARD
Drive vee
J107
Power
________
1
Flashlamp
Black-xxx
Red-White
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 'B" is high. point "C" the collector of the TJP1 02 transistor is
low. When Point 'C' is low the flash lamp 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
Drive
A
470n
J102
F112
100 11'
50V
Power
J121 ,
Xl
:
Flashlamp'
,
or
,
Coil
X ,
Blue-xxx
J107 '
Red-White
The microprocessor toggles the output of the 74LS374. When point "A" drops low, point "B" is high. A
high at point 'B" causes a low at point 'C'. When point "C' is low the coillflashlamp is grounded through
the transistor and the coillflashlamp turns On. When point 'A" tuggles high the coil/flashlamp turns Off.
• Tieback Diode is not used for flash lamp circuit.
Judge Dredd 3-9