Yes, I am trying to use one 40-pin ZIF socket in the El Cheapo board to
accommodate all the various DIP chip sizes. The original PCB was designed to
accept a 14-pin (standard or ZIF), an 18-pin (standard or ZIF), and a
chopped up 40-pin (with half of an 28-pin inside) standard IC socket. Figure
13-18 on page 600 of the book shows an El Cheapo with 14- and 18-pin ZIF
sockets and the chopped up 40/28 standard IC socket. The ZIF (zero insertion
force) sockets are very convenient to use, but cost about $10.00 or more a
piece. What I wanted to do is use just one Aries 40-pin Universal ZIF socket
to accommodate all the chip sizes (the 8-, 14-, 18-, 28-, and 40-pin DIPs).
Of course, additional power rails, the MCLR, Strobe, and select lines
must be hand wired to the appropriate pins on the 40-pin socket to provide
these connections for the smaller chips.

Since I am a newbie on this topic, I wanted to ask the group whether this
concept was workable. So far, I have not seen any replies. I bought the
Aries Universal ZIF socket online from Digi-Key, but I am sure any large
electronics supply house would carry it. I think it was about $12.00. Just
do a search and you should easily find it.

Leon  N3BOB


Mike Kendall wrote:

> Howdy Leon,
>     I'm wondering as I started to build an El Cheapo programmer myself.
It
> appeared in the book that I needed to "chop up" a few different types of
ZIF
> sockets.  Is this type that you are discussing a ready unit to be soldered
> into the board that is provided with the book?  If so, can you please
> provide a link for the web page or ordering info on it?
> Regards/thanks,
> Mike/ke6cvh

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