Expansion port Buttons for C64U and Elite2
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Adds three buttons above the expansion port to connect to the internal motherboard header.
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This is somewhat of a proof of concept, because I don't know if this will work with every C64 enclosure. It relies on a tiny gap between the metal expansion port cover and the enclosure.
I've included a test model that you can print to see if the frame fits before you print the full model. Feedback is welcome! Please let me know your results and thoughts so I can adjust the model if needed.
Info
I have included three different frames:
Center: Positions the buttons in the middle of the expansion port opening
Left: Aligns the buttons to the left
Right: Aligns the buttons to the right
Print Settings:
Nozzle: | 0.4 mm |
Layer height: | 0.2 mm |
Perimeters: | 3 |
Infill: | 15% |
Support: | only on the 'frame' part |
Parts:
Tact switches (3 pcs.) | The design uses 6x6x5 mm Tact-switches. |
Flatcable | 4 wires (I used a piece of flat cable, you may be able to find something with the connector already attached). |
Female header | 4 pin |
Assembly Instructions:
Fold the pins as shown in the image above. (Ignore the broken pins in my picture; you should leave yours attached.)
note: see tip for soldering bridges down below
The left button is marked with an 'L'. The 'GND' and 'L' wires should be positioned next to each other. Connect the wires as shown in the left image. Since the legs on my component broke off, I couldn't solder the GND wire, but you should attach yours to the pin closest to the middle (indicated by the yellow dot). Otherwise, you might have trouble assembling everything later.
On the other end of the cable, you can solder on a 4-pin female connector if your cable doesn't have one.
You can also refer to my Button Cap instructions for more detail. https://www.printables.com/model/1576541-button-cap-for-user-port-enclosure
Tip for soldering bridges
Strip a longer section of the wire
Twist the wire
Tin it
Tin all 4 legs
Solder the end of the wire to one of the legs
Cut the rest of the wire to length
Solder the remaining end of the wire to the second leg, then repeat this process for the other switch
Let's put everything together
Insert the buttons into the case. Make sure the chamfer is facing the bottom.
Insert the wired button block into the case. Ensure the 'L' mark is facing up and the chamfers are facing down.
You might need to push the tact switches back slightly so the whole assembly can slide past the buttons.
Ensure the button block is fully seated at the bottom of the case.
Make sure the GND wire sits flush. If you followed the instructions, it should be situated more towards the middle anyway. You'll see why in the next step.
Put the cover on and press it down firmly. You might need to flip the case over and apply some pressure to the entire enclosure.
Push the case onto the frame. Make sure the back of the frame is facing towards you. You will feel a bit of resistance toward the end. Just push through it; this ensures the case is firmly connected to the frame.
Make sure the pieces at both ends of the arrows sit flush
Slide the assembly onto your enclosure
Place the cable guide onto the expansion port cover and thread the cable through it. The cable should sit relatively flat against the frame and cover so that you can easily put the upper half of the enclosure back on.
Connect the cable to the internal header
Put the cover back on and you're done!