I’ve been racking my brain for quite some time, to find a solution on what to do with my MechBoard64 (link) keyboard project… The project started as I needed two new keyboards for my C64 Reloaded boards (link, link). Going into such a large project was quite naive, as I had absolutely no idea how much effort I actually had to put into it to get my two keyboards. However, I truly enjoyed the engineering part of creating the keyboard PCB, the search for a solution for the Shift Lock circuit, the drawing of the keyboard bracket, sending the drawings off to China and finally see it all come together. I’ve never drawn a PCB before, so that took me quite some time to learn. The laser cutting companies all ask for Adobe Illustrator files for their machines. However, I have never used that software either so that also took me a while to be acquainted with. Truth is (and don’t tell anyone, ok?), I’ve never actually owned a mechanical keyboard, so I’ve also spent a bit of time trying to understand the differences between switches, brands and where to get a hold of them.
When the MechBoard64 was finally realized and presented on my blog, it soon came clear that a new mechanical keyboard was the missing piece in the creation of a brand new Commodore 64 (…well that and some new keycaps…). As I have no intention to become a Commodore 64 mechanical keyboard manufacturer, I’ve therefore decided to release all information regarding the creation of the MechBoard64 . This includes files for creating the keyboard PCB (Gerber, Excellon, BOM), the keyboard bracket (Illustrator, PDF, bend allowance drawing), 3D printed keycap adapters (.STL), the keyboard stabilizers (dimensions, material) and all miscellaneous parts (cables, screws, nuts, super lube). This way users can make their own keyboards, modify them to accommodate modern day keycaps, make groupbuys or start making batches for everyone to enjoy 🙂
Below you’ll find everything you’d need to make your own MechBoard64.
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Here is the complete .zip archive containing all the files needed for making a MechBoard64 keyboard. The files can be downloaded using this link:
Printed Circuit Board
The printed circuit board can be ordered from PCBway.com using this direct link (a new tab/window will open).
The keyboard bracket should be made in 1.5mm aluminum to fit the microswitches. The bracket can be plain, anodized or powder coated. Powder coating is stronger than just anodizing the surface. I used a company in China called Shanghai Yinuo Machinery Co., Ltd. Their webside can be found here (link). They powder coated my brackets with great results. Their email is this (email).
If the bracket is powder coated, the coating adds to the overall thickness of the bracket. This will not allow the Costar plate inserts (Space bar and Return keys) to snap correctly into place. Using a Dremmel can be used to remove the excess powder coating to make e perfect fit.
A 20 cm ribbon cable is used to connect the MechBoard64 to the motherboard of the C64. Depending on the C64 motherboard version, use the pin header that is the closest to the socket on the C64. Text near the 20 pin pin header indicates what motherboard each pin header is best suited for.
Commodore 64C slim cases with long boards installed (e.g. Assy 250466 and 250425) place the keyboard pins on the C64 motherboard quite far from the keyboard pins on the PCB. A 10 cm extension ribbon cable will make it work. The cable can be made from two 10 pin cables and a 2.54mm pitch male single row straight pin header. I’ve makred the cable and added an extra pin to make sure it was not inserted incorrectly. The cables can be found on Ebay.
The MechBoard64 use Cherry mx style switches including switches from Gateron. I have found that Gateron yellows (55 g linear) resemble the original C64 keys the best. The microswitches can be found in numerous webshops.
The Shift Lock can use either a standard non-latching microswitch like the rest of the keyboard (using the Shift Lock circuit) or a Cherry mx Locking switch (link) that bypasses the Shift Lock circuit.
3D Printed Keycap Adapters
To use original Commodore 64 keycaps with the stems of modern day microswitches, 3D printed key adapters are needed. The keycap adapters can be printed by e.g. Shapeways in a material called Strong and Flexible which is also known as Nylon Plastic, PA12 or Polyamide. If using Shapeways for the 3D printing process, make sure to have them done as a ‘prototype’. Otherwise the print may fail their quality control…
Please note that the 3D printed key adapters only work with Cherry mx style switches and the standard Commodore 64 keycaps. Other C64 keycaps, like the strange ones shown below, will not work and hence cannot be used with the 3D printed key adapters!
The keyboard stabilizer system uses Costar keycap inserts and Costar plate inserts. The Costar inserts are needed for the Return key and the Space bar. These can be found in various webshops.
The size 2u stabilizer wire usually comes with the inserts. However, the stabilizer wire for the Space bar is size 9u and have to be made by hand. I used a DuBro EZ Bender no480 tool and a 1.00mm piano wire to make them.
SuperLube can be added to the Costar plate inserts to make the travel of the keys even smoother.
The PCB is assembled using plastic screws, plastic nuts and plastic spacers. The spacers should be 6-7mm in outer diameter. It is important that one of the spacers are no more than 6mm in diameter as this is the maximum size that will fit the top row, center hole.
A manual on how to assemble the MechBoard64 can be found here (link).
A complete overview of all published data regarding the MechBoard64 here on breadbox64.com can be found here (link).
I truly hope to see some nice modifications of the MechBoard64. Ideas that I’ve never thought of and will be proud of being a little part of. Good luck with your MechBoard64 projects!
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