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Without a test lamp or similar load, the SCR latched state will be released when the flash bulb is burned out. Any load maintaining a load current above MOC3010 holding current of 100 µA keeps the latched state.
Mentioning the exact purpose of the circuit had avoided additional queries.
The 33k resistor value in the post #1 schematic is obviously wrong. It would never trigger the SCR which requires 5 mA gate current.
Mentioning the exact purpose of the circuit had avoided additional queries.
The 33k resistor value in the post #1 schematic is obviously wrong. It would never trigger the SCR which requires 5 mA gate current.