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Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
it's possible that the diagram is over simplified. The inputs to A and B are a 595 IC, which is controlled by the parallel port of my PC. The input to C is a 595, who's outputs go through a ULN2803 to reverse the output (595 sends a high, ULN2803 sends a low, and vice versa).
I'm not sure...
I've been working on a Computer controlled firing system for fireworks, and I thought my design was going to work... all my breadboard tests worked great, so I built a PCB, and now a problem has surfaced... went back to the breadboard, and sure enough the problem has been in the design all...
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