Technical information

Micro-KIM Users Manual
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Install all the sockets, checking that the orientation with the notch in the narrow edge matches the PCB. With tin
leads, make sure all pins come through the holes before soldering the socket into place.
Install SST switch, it is black and has 3 pins. It mounts next to the GO button on the keypad. It can mount either
direction.
Next, install 7805 voltage regulator. It is a surface mount part but just put piece on board and line up 2 pins so
they sit even on the contacts on the PCB then add a little solder between the pad and the post of the 7805. Do
this for both posts and then also around the large flat spot on the 7805 top back area.
Next, install the 1MHz oscillator. Locate the 1 corner on the oscillator that is pointed and place the oscillator on
the PCB so that it matches the pointed outline on the board. The pointed corner is next to the 6502 socket. Trim
the extra lead from the pins after soldering them down.
Install the six 7-segment displays. Depending on the brand of display included in the kit, there may be 1 extra
hole for each segment. This is normal. Because of the pin orientation, you can not install this component
backwards. It is best to put all displays into the PCB, line them up flat, then solder them all in at the same time
to ensure that they fit correctly. Trim the extra leads from the back of the displays.
Next, install the 40 pin expansion header. The shorter side goes into the PCB, and there is no incorrect
orientation. The contacts are a little close here so take your time installing.
After you finish the expansion header, solder in the 2 jumper posts and install a jumper on JP1. You may need
some tape to hold the jumper posts in place while you solder them.
Next install the DC power connector and fold the tabs over.
The next components to install are the 9 transistors.
• Q1-Q7 are 4403’s
• Q8 & Q9 are 4401’s.
The transistors are polarized so make sure you install them the same as the footprint on the PCB. There is a
straight spot on the PCB and the transistor that you should match up prior to soldering. Trim the extra lead from
the transistors when finished soldering.
Next, install the fourteen .1uF capacitors. They are labeled with a “104” on them. They are not polarized so you
can put them in either direction. Be sure to trim the extra lead length when finished.
Next, install the three .22uF capacitors. They have the number 224 on them. They are also not polarized so they
can be mounted either direction. Again, trim the extra lead length off when finished.
The next capacitor is a 1uF capacitor and just has a 1 on it. The longer lead goes closer to the edge of the board.
Now you can install the power LED. There are 2 leads and one lead is slightly longer than the other. This lead is
the positive and goes where the + symbol is.
The last capacitor is a 100uF capacitor. It is polarized and there is an arrow on the capacitor pointing to the
negative pin. The positive pin has a label on the PCB.