MCUmall EPROM BIOS Chip Burner Forum
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 Using The Enhanced/Dual power Willem Programmer
 Problem with enhanced willem and 27cxxx

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T O P I C    R E V I E W
goukizero Posted - 12/10/2009 : 17:06:00
Hello

I just bought an enhanced willem with the 16bit 40-42 dip adapter, it has not extra power supply plug, it just has USB and Parallel port input.

I can read all (27c1024, 27c160, 27c800, 27c000) eproms ok, but i can't write any of them. I ever have the same error : 0x000000 chip = 0xff or 0x00 and buffer 0x00 or 0xff It depends about the bin file i want to use.

Well, I used all the combinations i could do with the wires, the programmer, the adapter. I ever get an error.

I can read all of them, so I suppose the Willem works...

I'm really desperated.

If you can help me, please !!!
2   L A T E S T    R E P L I E S    (Newest First)
simeon Posted - 01/23/2010 : 07:05:50
you can still use it by adding a small jumper between the vcc pin 32 and 28 on there tracks
when you want to program you can add 6.250 here from a small supply of 9vdc and using a three pin voltage regulator 5.1v and add some diodes to its ground pin to raise its voltage output to 6.2 {ie two diodes for 1.2v}{this is aok for reading also}

ZLM Posted - 12/15/2009 : 09:42:55
Use a 9v or 12v external power adapter to see if it works.

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