C64 Mini Keyboard – ‘Invisible’ fitting mod

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Spent a few hours this week adding an internal USB Hub, getting ready to start on a basic instruction sheet for the kits

As can be seen – you can’t see it’s modded externally (well, other than the keyboard). Both external USB ports still work and internally there’s a free USB port for a USB Stick 🙂

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C64 Mini Keyboard, 1/2 alive and Some CAD

Bit of a change of pace from the electronics, onto the CAD…Here’s a first draft of the first key on the C64 Keyboard – the Left Arrow!

Done at full scale, then at 50% scale

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C64 Mini Keyboard – Some progress!

Not much really – Shift Lock keys just arrived off the slow boat. The pinouts are confirmed, I’m going to hit ‘go’ to manufacture after another quick check on the PCB

Also, from a bit of researching, i’m not so sure the Diodes are needed.

I may have to make two batches of board, one with, one without

 

C64Mini Keyboard – PCB Layout Success

C64Mini - Final PCB Revision Maybe

After a loooong weekend and sneaking in a few hours – Success with the keyboard layout dimensions!

There’s few tweaks here and there remaining to align things perfectly and also to add some nice Silk Screen artwork

And, how I got there!

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C64 Mini Keyboard mod – More Electronics Part II – OOPS

After spending a while lining up the buttons and generally making the PCB layout a bit tidy, I figured I’d print a 1:1 and see just how well it aligns….

 

Oops…

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Parallel Port Conundrums

Have spent a few days now reading up on solving the parallel port issue.

it really seems that Eight out of Ten CNC owners prefer Mach 3

Mach 3 is a somewhat antiquated piece of software it seems, I’ll figure out if it’s really worth purchasing a copy or if I stick to the lower number of lines limit for Gcode, or, well, i’m not really sure (other software maybe?)

None of my computers have a parallel port. few, if any are running a 32 bit OS. and Prices of devices to convert the 25 pin Parallel port on the controller…(shown in the pic below)

DB25 Parallel port
DB25 Parallel port

are fairly high (though perfectly reasonable) compared to the price of the CNC mechanics.

There’s an absolute myriad of controllers, convertors, power-ers, drivers, thingies and other stuff that’s been developed, kickstarted, knocked up, and sold on a whim, too much choice really.

I went the stingy route and picked up an ONTRON USB CNC Parallel convertor for just $34 AUD. My thought process was

  • I have a machine that looks like it’ll work out of the box
  • That machine has a parallel port
  • it’ll be safer to use the machine as it was intended before attacking it further with a soldering iron and screwdriver
  • Given my penchant for un-necessary teardowns (developed at a young age after discovering screws in my parents VHS recorder, and discovering screwdrivers in my dad’s toolbox) it’s probably best to buy a tested working device
  • find the cheapest USB <> Parallel device I can
  • if Cheapest USB device doesn’t work, then find other options (Arduino CNC Shield, GRBL, etc)

The Device I purhcased……

USB Parallel convertor
USB Parallel convertor

Mach 3 compatible apparently
Mach 3 compatible apparently

It was shipped within 5 minutes of buying it (somehow I doubt the French are that efficient), Fingers crossed it arrives in the next two weeks like the auction said it would