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

Started May 21, 2012 | Discussions thread
OP fabianbono Regular Member • Posts: 190
Re: Success PC Port output on HVL-F7S (Sony NEX) without PREFLASH!!!

perez69 wrote:

fabianbono wrote:

perez69 wrote:

Do I need the SCR? My (mainly) use is to drive a wireless trigger.
If I attach a flash unit directly to the pc port do I need this SCR?

This SCR mod is just to trigger old flash units that handle high voltage on hot shoe and PC Sync port.

If you will trigger only a wireless trigger all is ok, just a transistor or a single optocoupler.

If I insert the transistor, can I use the same schema of the first circuit? Or should I change the resistors?

If you only plan to use wireless trigger, first circuit is ok.

If plan to use flash trough PC Sync port, is also ok, but more recommended to add an optoisolator.

In one or two weeks or so, I will receive my components, so will continue working on this version with optoisolator.

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