Flash Interface
Some flashes (mine included) like the Vivtar 283 have trigger voltages that will destroy modern cameras and other digital devices.
This is a very un-elegant solution. I am not very good with circuits, so I used a circuit I understand, the old Quaketronics output circuit with an input interface transistor.
It is meant to work with an open collector driver, like the CameraAxe and the TimeMachine, both of which work with this circuit. It works just great with trigger voltages up to 300 volts.
By the way, all the bypass caps, diodes and varistor on the +9 volt line are for filtering, to keep that darn 300 volt discharge from causing digital killing spikes.
Cheers.
Flash Interface
Some flashes (mine included) like the Vivtar 283 have trigger voltages that will destroy modern cameras and other digital devices.
This is a very un-elegant solution. I am not very good with circuits, so I used a circuit I understand, the old Quaketronics output circuit with an input interface transistor.
It is meant to work with an open collector driver, like the CameraAxe and the TimeMachine, both of which work with this circuit. It works just great with trigger voltages up to 300 volts.
By the way, all the bypass caps, diodes and varistor on the +9 volt line are for filtering, to keep that darn 300 volt discharge from causing digital killing spikes.
Cheers.