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#TAIT SERIAL PROGRAMMER SCHEMATIC FULL#Microchip publishes the full schematics of their PICKIT2 and I think they host downloads of the firmware for the PIC18F2550. It was made for the other stupid connector on the back of old computers. There was another very simple programmer starting with a J. #TAIT SERIAL PROGRAMMER SCHEMATIC SOFTWARE#I can't remember the software I used, anymore, though. That's how I programmed my first PICs, incidentally. If you were confident on your wiring, you could literally connect the PIC directly to the correct pings of a parallel port, and for the programming line, take that line, use it to drive a transistor to switch a 9V battery to the MCLR pin. The software pretty much does everything through the parallel port, and the only reason it can't program a PIC directly through parallel port is lack of the high voltage Vpp. ![]() The TAIT is essentially just a voltage buffer to protect the parallel port with the addition of a voltage translation to 9-13V for the high voltage programming line. This is supported by free programming software that is probably still around. Quote from: KL27x on November 06, 2018, 07:59:44 pm If you have a computer with a parallel port, you can make a very simple programmer called a TAIT programmer. And the 12F508 was a flagship baseline PIC from 20 years ago it is definitely supported by these old softwares. If you google TAIT, you will probalby find a software. *software might have been called "EasyPIC." I'm not sure. I was dumb enough to save a bunch of parts as if I'd just make more as needed, lol. Gottas say it took a few long nights to finish the layout, and even longer to populate all those parts. #TAIT SERIAL PROGRAMMER SCHEMATIC HOW TO#I have made full versions of the PICKIT2 (with some minor additions), and I didn't even know how to use PCB software as well as you already do. There are also some people who have made and published schemmies for simplified versions that have only fixed voltage power to target. If you have a computer with a parallel port, you can make a very simple programmer called a TAIT programmer. #TAIT SERIAL PROGRAMMER SCHEMATIC PRO#I’m no pro but I have done a fair bit of PCB design and ♜ work. Programmer like this is cheap and readily available so it’s just a time waste. It better to slowly build your knowledge than immediately jump on the hard stuff not understanding the basics. If your experienced with PIC's it wouldn’t take more than a few days but if your inexperienced with electronics design and embedded programming then it would be suicide, it would take so much time and you wouldn’t learn much since the difficulty level is much too high for a beginner. Designing the board for the programmer, writing the code is a lot of work. ![]() I dont think you knwo how much work it is to design a programmer. I’ve read through this thread and seen the versions of the PIC12 break out your making, for a first board it alright! Since you don’t know much about the embedded world ill help you out, DONT MAKE YOUR OWN PROGRAMMER!!!! Its so much work to do this and its way to complicated for a beginner like you. ![]()
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