32kb Memory Extension Board for the Micro-KIM

I recently re-designed my Solid State Tape Device for the micro-KIM and renamed it "digital Tape Recorder". So, now I have a blasting fast digital Tape Recorder to save and load programs to and from my micro-KIM it was time to design a Memory Expansion Board to add some RAM to my KIM.

This project is all about this Memory Expansion!

The board fits on the micro-KIM expansion header and you snap the digital Tape Recorder to the Memory Expansion Board to make it one. The memory Expansion also fits the PAL-1 (a micro-KIM clone).

Read all about it on my website.

Step 1: The PCB

The PCB has two sides, make sure you have the right side up (the side with the parts outlined)

Step 2: Placing the IC Sockets

There are three IC Sockets.

one with 14 pins
one with 16 pins
one with 28 pins

Make sure you have the notches at the right end (near the white dots).

Put some sticky tape over the Sockets and turn the board upside-down.

Now solder each pin and remove the sticky tape.

Step 3: Place the Through Hole Components

Now place the two 1k ohm resisters and the three 100nF capacitors.

These components has no polarity so you cannot place them "the wrong way".

Again put some sticky tape over the components and turn the board upside down.

Solder the five components.

Step 4: Soldering the 40 Pin Connector

Depending on your setup the memory board may need some distance from the main micro-KIM board. I, for instance, have a plexiglass plate over my micro-KIM so any extension board need some extra space to fit on top of the plexiglass. Therefore I use a pinheader with long poles. Align the pinheader to your needs and solder one pin somewhere in the middle.

Now check the distance and if that fits your needs solder the other 39 pins.