Time’s progressing and it’s still taking a long time to obtain a satisfactory print of my CAD keycaps. Some quotes have come in and…they’re quite a bit.
so, time to change focus for the short term to let me actually play games on the mini with all the keyboardy goodness that a working keyboard will allow
So, on to some butchering
The Plan….create a plaster of paris negative of the original keyboard – to hold the keys straight when attaching them.
Step 1 – Print out the case design from my last post
Fits like a glove……..or does it?
Step 2 – realise that I’m making a NEGATIVE and the keyboard needs to sit INSIDE the box, ‘upside down’ Redesign and re-print…
Step 3 – Coat liberally in spray oil… Wife wasn’t too happy that I’d used her pricey artisnal olive oil from our trip to Italy, nothing but the best for my Mini though………
Step 4 – Knock up a batch of Plaster of paris…About 50 grams of powder and 60ml water worked for mine….not too viscous. pancake batter
fill the keyboard case just over 1/2 way to measure what you need
Step 5 – Fill up the mould
Screw on the keyboard – making sure the keys are aligned and straight with the F Keys and wait overnight…
Use the holes either side to top up the plaster so it overflows a little
Give the whole combo a dozen or so short sharp drops / knocks on the table to free up any air bubbles
Looking a LOT better!
After a few days, I’ve now got something workable – The switches being Thru-hole allow ease of routing on both the top and the bottom layers. I’ve named each switch and diode with the keyboard’s actual Symbol to make placing them on the PCB much easier. you’re seeing the results of a few days work (maybe about 4 hours all up) of starting from scratch on the design.
Next step will be aligning the PCB layout and spacing with the plastic buttons
I’ve done what I can based upon rough assumptions above – the top row of switches for example – its row of buttons ‘just’ fits within my calipers – so it’s about 151mm wide
Whipping out the calipers again…….
Continue reading “C64 Mini Keyboard mod – More Electronics”
A quick bit of googling suggests that ‘Tactile Switches’ are what’s needed…..I’ve used these before on other projects,
Continue reading “C64 Mini Kebyboard Mod – Switches”
The Bottom Side of the C64 Mini Keyboard
There’s Plenty of Volume – But what switches can be used to put inside the keyboard?
I’m not too worried about the electronics side right now, there’s plenty of Arduino keyboard emulator tutorials out there.
Continue reading “C64Mini – Keyboard Mod”
Some time back I purchased a Lovely little Commodore Retro item –
A C64 Mini
Borrowed off the Retro Games website – The C64 Mini
It’s a TINY C64…….With a non-functional, cosmetic appearances only keyboard 😦
Lets fix that…………….
Continue reading “C64Mini – Quiet but still Tinkering…Keyboard Mod”