hey i have just rescived my Arduino board and want to use it to take High Speed photography of water drops, i have this circuit of a photogate trigger :
I have tried connecting it to arduino useing the button tutorial and code and the circuit from this post:
I can get it to detect when i pass something between the photogate and light up the LED, but the LED stays ON, shouldnt it only flash when the photogate get triggered? If i unpluck arduino from power i can get it to detect again.
Any circuit or code help would be nice.
below is there a link to some of my photos taken with my old delay unit but i want to improve it even more and i think arduino will be a great help
hope you can understand what i mean, as i dont have much experince in electronic.