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 Open Source Project Willem Programmer Hardware
 Hardware PCB Layout for Dual Power Willem/PCB3B

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mcumall Posted - 06/22/2005 : 13:15:42

D1,D2 CD4503 ==> data write buffer from LPT port output
D3 CD4014 ==> data read buffer/converter, to LPT port
A1 CD4503 ==> A0~A7 address decoder
A2 CD4503 ==> A8~A15 address decoder
A3 CD4503 ==> A16~A23 address decoder
V1 34063A ==> 12.7V~25V Vpp DC-DC converter
C1 74HC04 ==> Vcc on off control and data read buffer
6   L A T E S T    R E P L I E S    (Newest First)
johnb Posted - 03/25/2015 : 19:08:28
Sorry second reply.
johnb Posted - 03/25/2015 : 19:07:31
The programmer in the thrid reply which one is that. I have one that looks just like it and need the info on it.
burhan Posted - 11/08/2011 : 10:30:25
willem v30 willem 40 pcb files and other desing programmer
Chezedik Posted - 03/08/2007 : 19:40:44
Are there many other versions, because mine doesn't look much like either of those.
usb Posted - 10/26/2006 : 10:27:46
The enhanced board layout provided by: YMasquel
See original post:
concrete Posted - 02/13/2006 : 14:24:36
Do you also have a hardware PCB Layout for the Enhanced Willem board too? Could you post a photo like the one above for reference. I've found half the photo (posted by usb)

but would like the full board identifying the components. Thanks.

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