I am attempting a circuit design that involves connecting to a DLSR camera PC port. Newer digital cameras deliver very small amounts of current (mA) to their PC port during shutter release. This very small current sets off the flash to any connected camera flash. My circuit will connect a very old flash to this new digital camera. Old flashes (Flash bulb flashes) are triggered by higher amperage amounts. These higher amounts would fry the controller board on the digital camera. Hence a circuit in between.
I need to understand exactly how many mA are sent to this port, when the camera’s shutter is triggered, but because the duration of the current is in the milli-second timeframe, I do not know how to use my multi-meter to capture a current this short in duration.