|Project by oldnovice||posted 304 days ago||1214 views||2 times favorited||18 comments|
In the 1970’s I was deeply involved with the microprocessor evolution and all of the hardware required to build stand alone microprocessor based equipment. We started as a small group and over the next few years grew to the point that in the early 1980’s we some people decided move on. When two of our group decided to leave we wanted to give them a going away gift to remember their time with us.
As a going away remembrance I made a scaled up version of one of the first EPROMs (Electrically Programmable Read Only Memory). These memory packages had a quartz window so they could be erased by ultraviolet light. The die inside the package was readily visible.
The image above was one of the original packages that later evolved into lower cost packages with round windows as shown below.
The package above was my reference package for the scaled up model. To replicate the die I used individual photos of the group (blurredfor posting on LJ) and arranged them in a grid with a message above (wiped out) and a message below. The 24 pins on the package were made from brass, bent on a brake, and screwed to the middle base.
A Plexiglas cover was cut, mounted in the opening, and secured with black RTV to simulate the epoxy on the real package.
The bottom of the package was left clear for signatures from the people left behind.
-- "I never met a board I didn't like!"