I am having some trouble with a circuit for a laser phototrigger (schematic courtesy of **broken link removed**). **broken link removed**, and **broken link removed** is my current circuit. Photograph of my actual breadboard, with an overlay of the circuit to hopefully make it easier to read.
Basically the idea is to have a laser pointed at a photodiode, when the beam is broken, it triggers a brief timer which then fires the camera. When the laser is hitting the diode, there is 5V going in to pin 6, when the beam is broken, it drops to roughly 1.6ish (to fall into trigger range). I am having trouble getting the second timer to fire and briefly light the trigger LED (which would mean the voltage from the red wire would drop to zero, firing the camera).
My terminology and knowledge is pretty limited, so for that I apologize. If anyone can help troubleshoot this I'd greatly appreciate it (feel free to respond simply and as though I were a complete idiot on the subject, because.. well I am!).
Thanks in advance,
David
Basically the idea is to have a laser pointed at a photodiode, when the beam is broken, it triggers a brief timer which then fires the camera. When the laser is hitting the diode, there is 5V going in to pin 6, when the beam is broken, it drops to roughly 1.6ish (to fall into trigger range). I am having trouble getting the second timer to fire and briefly light the trigger LED (which would mean the voltage from the red wire would drop to zero, firing the camera).
My terminology and knowledge is pretty limited, so for that I apologize. If anyone can help troubleshoot this I'd greatly appreciate it (feel free to respond simply and as though I were a complete idiot on the subject, because.. well I am!).
Thanks in advance,
David
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