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.
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.
I built the version on This page that uses the 74HC126 as output drivers. It works very well on the AVRs that I've used. If you use SM parts and a resistor pack, you can fit the circuit into the parallel port DSUB connector. I am using mine with about 1m of ribbon cable with no problems.
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) but it seems to be pretty easy 
