Re: LF: RE: SMT Devices

["Larry Kayser" <kayser@sympatico.ca>]

> Andy:

> There was a techniques described a couple of years ago for using these chips
> dead bug style.  Mount the chip upside down on a piece of unetched PCB.
> Bend the grounding pins down and solder directly to the groundplane.

This is how I built my first Intel 4004 back in 1972.  My list of opcodes 
was a type written list and it took three months work to get this little 
darling to print out the first "A" on an ancient Chicago Teletype Corp 
Model 33 printer.  Three more months and some additional memory it was 
controlling the OSCAR    VI satellite for me (which I did for over 5 years 
hi).  We had raging debates in a local eatery on the use of the different 
opcodes.  We set the clock with 74121's with a scope and pots, with the two 
phase overlapping timing used to drift and eventually the thing would stop 
working at times.  Dead bug work here goes back a long way hi.
It takes a lot of courage to work for weeks and then turn it on to see if 
you "got it right"!!!!
Larry
VA3LK