I just had a thought for ya'll (and I'm sorry for butting in like this)... but...
ya'll are talking about using SMT chips to create homebrew CPU's.
Many of the logic chips ye have been using do, indeed, come in SMT, SOIC type packages
correct?
Well... using ExpressPCB (the CAD program) I quickly rigged up a SOIC-8 (8 pin SOIC) to
a 32 pin DIP package (4 SOIC-8 package on one chip).
Below are some links.
Anyway... using that kind of setup ya'll could make a PCB that fits into whatever
package the original came in. Thus using the old computer with a brand new homebrew CPU.
The ExpressPCB miniboard service will run ye 50-some bucks for a quantity of 3 boards (3
boards required)... but ye can fit 21 32 pin dip packages on those boards (7 per board).
Thus making them easily profitable if ye should choose to sell them.
BTW... when I rigged these pieces up I used a pin to pin connection. If I had the specs
for the chips ya'll want to use... the I can easily rig up a similar adapter and
(using a 4 layer PCB) connect all GND and VCC/VDD pins together... thus reducing the pin
count and allowing more components to fit on the same board.
Those who would like to see a certain chip(s) type put on a through-hole adapter... you
are welcome to send me an email with the following info:
Name:
Email:
Chip Package:
Adapter Package:
# of Layers (2 or 4):
and attach PDF datasheets on all components if at all possible.
Note: I will only draw the PCB... you are on your own ordering the boards.
Note2: These boards will require cutting to separate the individual pieces.
Note3: The '.zip' file I link to contains the '.pcb' drawing that is
compatible with ExpressPCB
Links:
www.geocities.com/lyosnorezel/soicx4todip.bmp
www.geocities.com/lyosnorezel/soicx4todip.jpg
www.geocities.com/lyosnorezel/SOICx4toDIP.zip
Good Luck!
Lyos Gemini Norezel
---------------------------------
Yahoo! Messenger with Voice. Make PC-to-Phone Calls to the US (and 30+ countries) for
2?/min or less.