Any electronics experts here?

Cheers. I knew you needed the isolation to prevent the camera being consigned to the spare parts bin :eek:

Just wondered about the significance of the cell.

Hope you get it working now.

Llew
 
I think the cell is there to provide a supply for the photodiode in the opto coupler, would work on most older camera's with a breif closing contact, or a volt free switch
 
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