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Ignition monitor strobe

2015-01-20 07:34  
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Trigger voltage from a direct connection to the car's ignition circuit of a spark plug. This circuit is a direct trigger timing light circuit from Figure A shows. Another use of a trigger circuit transformer and an inductive sensor is used to trigger the development of high-voltage pulse. Figure B shows. The  trigger  circuit from thallium, SCR1, CI, inductive pick-up coil T2, and the SCR gate circuit in the waveform shaping means.

Ignition monitor strobe 

When the spark plug fires, it induces a pulse in pickup coil T2 that triggers the SCR gate. The SCR fires and discharges C2 through the primary of Tl. The secondary of Tl feeds a high-voltage pulse to the trigger electrode of the flash tube. That pulse causes the gasa€”usually neon or xenona€”to ionize. The ionized gas provides a low-resistance path for CI to discharge, thereby creating a brilliant flash of light. Resistor Rl limits current from the supply as the tube fires. When CI is fully discharged the strobe tube cuts off and returns to its ' 'high-resistance'' state. The current through R2 is not enough to sustain conduction through SCR1, so it cuts off and remains off until it is re-triggered by a gate pulse.


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