Success PC Port output on HVL-F7S (Sony NEX) without PREFLASH!!!

Started May 21, 2012 | Discussions thread
j13l Junior Member • Posts: 32
Re: Success PC Port output on HVL-F7S (Sony NEX) without PREFLASH!!!

Long ago (early 1980), I made a circuit to trigger a flash with the sound for water drop photography. I used a microphone, an amplifier and a MOC3033, and it worked well.

Here, the current source is provided by the NEX camera and the current of the LED will be limited by a resistor. (5mA)
The TRIAC(250v) MOC can directly trigger the flash. (check polarity)

To be verified.

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