Taking the resistor to pin3 was a bad idea. It worked for the half dead 9v I was using. But after I switched to a new one it heated up the timer chip really quickly. I did try adding a resistor to the gate but it didn't seem to solve the problem.
Okay, it was the resistor from pin3 to the SCR that was causing the problems. I ended up taking it out. I wanted to add an LED so I could see when the beam was armed. I just attached it to pin6 though I don't know where the best place would be. Seems to work though. Here's the final layout. I'll...
Plusaf, thanks a lot for the reply. This thread would be positively dead without your replies. I'm going to test this out as soon as my new rechargeable batteries are ready. I've been killin' so many alkalines. I'll update later.
ok slight problem which I'm sure there's a simple solution. The circuit works sometimes. What I means is that when it works it will consistently work firing everytime but sometimes if turn off the circuit and come back to it it won't fire at all. Is this related to grounding?? I'll give an...
Thanks a lot for taking a look at the circuit. Your post was very helpful. I thought it a good idea to test different areas of the circuit to see they worked but did not know how to nor what to look for. Your post outlined it exactly thanks.
that's right I have an external flash that has an...
To have an adjustable delay would be nice but I don't think that's part of the design. If it fired instantly would be acceptable. Pin 8 on the diagram is connected to the positive from what I can tell. The phototransistor (infrared detector) is diagrammed to be connected to pin6 i think. Thanks...
oh i think they're locked down or sumpthin. I've never posted here before (I mainliy read the posts)
I think this may work for pictures.
http://www.dpchallenge.com/portfolio.php?USER_ID=19408&collection_id=5784
This is trigger for a camera flash unit. It's suppose to fire my flash unit when the infrared sensor gets interrupted. I don't know if I'm building it right. In any case nothing fired.
Hi I'm trying to build a simple circuit but my physics is shaky. Could someone be kind enough to take a look at what I've done and notice any rookie mistakes? Thanks! The top side is positive.