I am trying to trigger a photo flash gun that simply requires the short of the pins on the hot shoe.
The circuit I am using is based on the Uno driving a 6N138 optocoupler. An LDR paired with a 10k resistor and a laser pointer gives me a range of values on A0 from 500 to 950 when the beam is broken
This code
int sensorPin = 0;
int sensorValue = 0;
int cameraTrigger = 13;
Everything you even needed to know about flashguns. Including different flash trigger circuit suggestions way down the document. Basically it is a two terminal interface what has to have a 'standoff' voltage rating => then the flashes hotshoe voltage.
Everything you even needed to know about flashguns. Including different flash trigger circuit suggestions way down the document. Basically it is a two terminal interface what has to have a 'standoff' voltage rating => then the flashes hotshoe voltage.
Thanks but I don't need a flashgun circuit, I simply need the optoisolator to act as a very fast relay, when D13 goes high the other side of the gate has to close fast and stay closed only as long as the pin stays high