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.
no, again that's programmer that uses your serial port to feed itself off...
It might work with the charge pump (according to the text).
But why not build a programmer with a power supply of it's own? much more reliable.
i have also built a JDM programmer and uses a IC prog software and serial interface.
first, it sometimes work, sometimes not. then i isolated the 5V supply and used a 7805 in the VCC pin of the pic, and programming is now always successful
Check that each output has a good 5v or 12+v and that it switches smoothly from 0v. I have also found that a very small cap on the data, and clock line helps.
They do work, but they are very machine dependent - due to the simplicity (crudeness?) of the design. This is why WinPicProg doesn't support them, I don't consider them reliable enough - I get enough support emails as it is!.
The JDM programmer is really a very clever design, it's certainly unusual, and quite hard to figure out how it works - it's very confusing!.
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