Midi Merger

Hi All I have successfully built the Midimerger using the 16F87x and it is fantastic :D:-) Thanks Thorsten much appreciated. I would now like to build the 16F88 version but to cater for 3 in and 1 out. Can I do this by simply buiding two single versions and cascading them without having to interface them to each other via an opto-coupler? Would a single connection with a pull-up resistor do the job? As youv'e probably guessed, I'm not a designer :wacko: Any help please? Thanks

Hi All Just to finish this thread. I built the 16F88 version and cascaded two together thus giving me my required 3 in 1 out. I connected the output of the first 16f88 directly to one of the inputs on the second. Both share the same power source and it appears to work fine. :D As there are only a few components, it fits into a small plastic sandwich box and costs very little compared to a commercial version. So I can happily recommend this. Cheers Chris PS Sorry - seem to have dupl