Triac light driver

Controlling room lighting using computer. I bought some triacs and opto couplers to do this. I drew the schematic and built a prototype. Everything worked well. We cannot see it on the pictures, but there is a cable going out of the box that plugs in the PC parallel port. The small grey box on the leftmost picture contains a 7805 and a 76ls06 to driver the opto couplers.

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