2 ms·
A (cheapish) multimeter is going to be too slow to catch the signal from a flash shoe, however any cheap microcontroller or electric circuit should catch the si
by Doxin 8y ago
A (cheapish) multimeter is going to be too slow to catch the signal from a flash shoe, however any cheap microcontroller or electric circuit should catch the signal with ease.
- dylan604 8y agoSo, any suggestion on what the voltage from that port would be. That was my hang up. Since the multimeter wouldn't register, I was just guessing. I started at 5v similar to the shutter release, but never could get a reading from it to register on my Arduino.
- pawelk 8y agoThere's no voltage. Maybe your meter could register drop in resistance (from ~∞ to ~0). Think of it as simple push button. Or, to put it differently, you need to supply your own voltage and it will flow for a moment when the camera triggers the flash (closes the circuit), and you can register the spike. Edit: the circuit is insulated from the camera electronics since some flash lights can send 250V or even more trough the PC socket - it acts as the pathway for the charge from capacitors to the bulb (in some, esp. older strobes).