MCUmall EPROM BIOS Chip Burner Forum
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 Open Source Project Willem Programmer Hardware
 Enhanced Willem Chips

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satellites101 Posted - 09/05/2005 : 18:35:48
Can anyone tell me what the chips are on the enhanced willem eprom programmer? I have this programmer, and would like to know what chips are on the board in case I need a replacement. Any information will be greatly appreciated. Thanks in advance.

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usb Posted - 09/20/2005 : 10:37:53
I'm not sure. My impression thay are CD4017.
satellites101 Posted - 09/16/2005 : 05:48:06
Thanks for the information. Could you tell me what the 14 pin chip located to the right of the USB power port is? It is mounted horizontally and is also right beside the capacitors behind the power port and directly below the first couple of leds. Also, the other 14 pin chip located right beside the zif 32 on the right side, next to the 20 pin chip? Any information will be greatly appreciated. Thanks in advance.

usb Posted - 09/05/2005 : 21:45:07
The main par of the Enhanced willem is same as the Willem PCB3B programmer. You can refer to the PCB3B schematic, and find out those chips easily.
There is a PAL logic chip located at the right side of ZIF(20 pin DIP), it may be PAL16V8. Also,the LED selection chips should be CD4017.

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