The shutter button on the camera (and on the remote) is using two switches which is swiched in succession. Without both, bulb mode won't function.
You need two opto-isolators.
// Per.
The shutter button on the camera (and on the remote) is using two switches which is swiched in succession. Without both, bulb mode won't function.
You need two opto-isolators.
// Per.