All kits posted! (Except for 1 assembled)

If you’ve purchased a kit this past couple of weeks, it’s now been posted.

I’ve only 1 remaining kit to post, but first I have to solder it (Mr L D from Italy, I’ll start it this weekend)

I’m doubling down on keycap development now, hoping to have those ready in time for new stock

Let’s say March 1st to be safe, hopefully a little sooner if parts arrive quicker 🙂

C64 Mini keycaps, Bleugh’s Log, date 12012021….second print!

This one went well 🙂

Note, the intentional ‘stone effect’ finish 😉

Most people would say this was caused by an over excited person, whom, upon waking early and discovering the complete print decided to not follow the correct drying / washing procedures in order to get it finished quickly!

I, err, disagree…

Either way, I now have a firm grasp of changes needed to the CAD model and also the supports needed in the slicer.

Those changes are fairly substantial, so I expect it’ll be a little while for my next update, happy to document them also if anyone’s interested.

Freshly dried and washed
Perfect size
A quick comparison

Keycaps progress! Still a long way to go….

Hot off the printer!
Somehow I lost the E again

Wow! An exciting day today.

After quite some nervous trepidation, I finally shoved some resin into the printer and achieved my first ever resin print.

And, amazingly, some stuff worked! Significantly more than I’d expected to work actually.

I’ve been quite ‘scared’ of actually starting a print, I‘ve read too much about toxicity and fumes, which aren’t things you want with two young kids.

Well, I spent a couple of hours doing some final reading, and setting up on the dining room table. Levelled the bed, levelled it again. Shoved in the resin and…a Spectacular success for me!

I know the print failed mainly due to poor supports, some text is also too fine. Both were concerns with the cad and the slicer and easily fixed 🙂 there’s probably a dozen other issues I’ve not found yet also (it’s been 30 minutes since I wash and cured them fresh off the printer)

Next step, iterating, optimising . It could be done in a few weeks at print 3, it could be print 10 and take a few months , but now I’m over the first hurdle, onwards and upwards!!

Here’s looking at U

C64 Mini Keyboard – Small bit of Keycap Progress

It’s going to be a while yet, but I’ve finally fixed some long standing issues with the keyboard model i’ve been building in Fusion360

Doesn’t look like much!?

The main issue was a badly created model!. I’ve junked quite a lot and started back prior to when some odd dependencies crept in and really put some roadblocks on scaling things correctly and adding finishing touches.

But, it’s been worth it

That previous picture is the underside of the Keyboard – Those holes in the keys are 2.2 x 2.8 holes. it’s a first run at fitting the key switches into the keycaps. a lot more iteration needed to hollow it out a little and create some form of inbuilt snap-fit with stress relief, but…it’s a start!

The silver / grey keys over on the left are the ‘parent’ keys

If I make an update to the curves or size of a parent key – it rolls out to all the same sized keys in its row

if I need to iterate the hole size for the key switches, I simply change a few parameters for the hole size and it rolls out to all the keys in one go.

I’ve taken so long to develop it parametrically as it’ll now be so much quicker to iterate

Lots of parameters to change!

and, here’s a new render!……..going to spend the next few weeks iterating, and hopefully over Christmas , fire up the resin 3D printer for the first time!

C64 Mini Keyboard Kit – Contents

Just realised that it’s not easy to find an image to show what’s in a kit.

Here goes


what you need to add;

  • YOUR OWN KEYCAPS – Freshly butchered
  • plaster of paris / silicon for the mould
  • Solder
  • Glue

What’s In the Kit

  • 1 pre programmed arduino pro micro with headers
  • 70 normal switches
  • 1 locking switch
  • 70 diodes
  • 1 PCB
  • 1 USB hub
  • 1 4 core wire
  • 2 short USB cables one of which you cut the end off if you want, or cut / reuse the USB hub one)
  • 4 Screws (to help align the mould)
  • 1 3D printed plastic mould / jig to create a mould to put your keycaps on straight
  • 2 small pieces of heat shrink tubing

C64 Mini not included, but this is what yours will look like once you’ve assembled the kit

Coming at some point in the future (late 2021 at this rate) – 3D, resin printed Keycaps!

Another C64 Mini keyboard kit success

A very talented Hans Liss from the Facebook group – TheC64 Mini has make a perfect assembled kit.

Drool over the photos below

Note the extras like the hacked up USB hub to make it slimline

The Extra UART connector that he’s added, and the nigh on perfect Keybaord keycap butchery!

Hans also helped by pointing out a few errors i’ve made with the original firmware sent out with the kits. I spent a couple of weeks figuring out how to fix it and have a new HEX file for those that want it.

There’s still some ‘not quite exactly commodore’ quirkery happening – which i’m working on, but i’ll bet that 99% of you won’t be able to figure it out. I’ve only found out due to Hans’s extensive knowledge of the C64 inner workings and also me, downloading the original user manual for the Commodore 64.

C64 Mini Keyboard Kit – New Firmware available

New Firmware upgrade available

It’s been an intense and frustrating few months trying to figure out QMK in spare time here and there – today, something ‘clicked’ and…..I’ve made a new keymap.

Please email me – KEYBOARD AT BLEUGH DOT BIZ for a new HEX file. also happy to help you flashing the thing with the Arduino IDE (it’s quite easy!)

Why I developed a new keymap

A couple of users have reported that the key mapping is a little wrong when plugged into the mini.

By ‘key mapping’ it means, when you press a key, or combination of keys, you don’t get the character that’s shown on the keycap.

Most people will know this if they’ve ever used a US keyboard on a UK computer or vice versa, that Shift and 2 gets annoying after a while when you’re trying for the @ sign!

So, I’ve dun fixed those minor niggles that people observed….AND, i’ve gone and added quite a bit more!

Continue reading “C64 Mini Keyboard Kit – New Firmware available”

TheC64 mini Keybaord kit – a successful first build by a user

Batches 4 and 5 have started arriving! Here’s some pictures from a happy user who only received it a couple of days ago 🙂

Great soldering job 🙂

Good soldering job on the rear too.
Great use of the heat shrink to tidy the invisible mod up!

C64 mini keyboard kit – keycap butchery success!

Have been promising a long time to do this, so finally took a few hours to butcher another mini!

Some views are excellent
Another great view
And the worst view

As you can see, for the most part, it’s pretty good, but NOT perfect

what I’ve discovered…..

2 part epoxy works best

Each keycap row is a different depth – the top one needs the least glue, row 3 the most

My errors here. I used a hard plastic glue from Bostick. it doesn’t grip well enough on the top of the keyswitches. I glued everything, waited a few hours, half the keycaps didn’t stick

glued the rest, waited, half again didnt’ stick…rinse and repeat about 6 times, adding more glue till finally they all stuck.

The 2 part epoxy stuck fast and hard! – but I used too much.

The repeated adding of more glue caused the multiple key levels you can see in the picture

I’ll try one more time I think!

C64Mini keyboard kits shipped!

First batch of 15 kits shipped!

Postage on most was actually slightly cheaper than last time! But the two heaviest ones were more, the largest one was quite a bit more than anticipated…so it all averaged out ok…

One repeat customer has a couple of freebies, only one assembled this time!

Also my first ever customer finally will have a spare kit and some stuff to practice with 🙂

Next small batch is coming as soon as the 20cm USB cables arrive.

If you want a kit without the short, tidy looking USB cables then shout and I’ll do a small discount 🙂

Amusing story and reversed switches on the C64 mini keyboard kits

Correct orientation of the switches
Correct orientation from the top. (Except the shift lock…oops! That’s why I put extra switches in :-p)

A funny story about multi sourcing components and the importance of testing before shipping!

I used a supplier on Aliexpress to purchase a few thousand switches in a few orders over a few months but their prices went up quite drastically after the last order (doubled!!) they weren’t the cheapest to start with but were reliable and friendly, worth the extra ££

I found another supplier who did a good deal for a full bag of 4000! Ordered them and waited, very quick delivery and friendly also (will buy again!)

I built my first test new keyboard with the new PCB and switches

It didn’t work. Well, actually, it did! Work perfectly…but in reverse :-p …..

If you mashed every key simultaneously then only released the key you want to press….it worked!! Yeah, the supplier sent me 4000 ‘inverted’ switches! My fault for not checking prior to ordering, they ‘look the same’ so ‘must be the same’ was a wrong assumption on my part! (At least they all weren’t the shift lock type!!)

It’s a VERY easy fix though (found after several panicked hours of testing and building Keyboards)…rotate the switch 180 degrees and it’s perfect!

In each kit I’ve included a small errata note and list of basic instructions to help. It’s an annoyance but for you guys it really just means the silk screen doesn’t quite match the switch orientation so just ask first. Look at the pictures and of any doubt, email/messenger/twitter/Reddit me 🙂

C64 Mini Keyboard kits, ready to go :-)

I’ve a small batch of 14 kits assembled and ready to post 🙂

The ‘slightly open’ ones are waiting their 3D printed inserts which are taking about 6.5 hours for 3 right now 🙂

Send me a message if you are reading and would like one.

I have enough parts to make 50 kits all up, except for the USB cables – I’ve lost a large bag of them somewhere so have ordered more 🙂

C64 Mini Keyboard kit – a successful user :-)

By reddit user mfriethm. Looks amazing

I sold the first batch of kits mostly on Reddit

Over the past few weeks they’ve been making their way around the globe and I’ve had a lot of happy reports back

Today, Ive been able to relax finally, the Mould works 🙂

Reddit users fantastic gallery

He’s done an amazing job using a silicone mould!

The workflow – make a mould of your uncut keybaord

Cut the keys out, tidy them up

Place keys in mould

Put glue in keys

Place keyboard on top and use screws to align

Voila!

C64 mini Quick doodle for the USB hub mod

Had someone ask, so here’s a quick and rough explanation

You need to make SIX solder connections

First, lift the centre two pins of USB1 on the mini

Second, cut off the plug and solder four pins from the USB hub cable to the bottom of the USB1 connector pads on the PCB

Third, cut off the mini USB of the longer USB cable and create a bare end. Solder two data wires to the lifted pins on the mini’s USB connecote

This then attaches the USB hub in full to the minis processor

And just uses the physical connector on the mini as an extension of one of the sockets on the hub!

C64 Mini Keyboard – More CAD

The first mediocre print!

It’s taking way too long, but I think I now have the lettering ‘just right’ – at least on the screen.

This was printed a bit too hastily at 0.08mm layer height on an Ender 3 printer. I’d used a brand new roll of untested filament and didn’t bother changing any settings. – it’s dimensionally ‘spot on’..

I’ve purchased a 0.2mm nozzle for my next trial , it’ll take ages but i’m hoping that those fine details on the characters come out a little better.

Why it’s taking so long……..

I’m learning as I go. I’m ‘tracing’ letters i’m finding on the net, creating them as a new sketch along the whole rows. There’s 4 differently angled rows so each needs to be extruded in a different direction to ‘cut’ the key.

This first run matches the C64 keyboard font as close as I can get. I’ll then ‘archive’ this layout for future use and create a second ‘3D print’ version.

This version will forgo the accuracy of the font and make features much wider, more rounded to allow the characters to come out better once 3D printed. The complex ones like ‘run stop’ won’t ever come out great on a standard filament printer, but the letters already come out pretty good…that’s a win for me!

a full keyboard!

The full keyboard is above – and you can see part of one of the adaptors i’m designing to click them onto the keyswitches. each keycap is hollow. that small grey part will sit inside the keycap

Where the time’s being spent…..

And finally – part of what’s taking so long.

Each key/character is taking on average about 1/2 an hour to an hour to design. Lets say 45 minutes.

65 keys to label

That’s a LOT of minutes…and i’m only getting an hour or two every few nights – a good solid weekend ‘free’ would be great and have this sorted.

On top of that labelling (which is now finished) I have to try to make each letter more legible and easier to 3D print. Generally that means ‘bevels’ everywhere – you can see above that i’ve done ‘Run Stop’ and ‘Shift Lock’ but SHIFT is still to do….it’s not as easy either as ‘copy, paste’ the Shift from Shift lock – that’s a different sized font on a different sketch plane.

Just one example of the issues I’m seeing…The Letter B

The Letter B – trying to create a fillet – rounding off the edges

The Letter B above has an issue with the geometry – just by the 0.1 – there’s a part internally up towards the arrow that shouldn’t be there – that’ll could play havoc with a slicer when set to really small layer heights

B – Alternate view

But, the Fillet also creates a zero thickness surface which looks unsightly and will probably cause issues if I don’t correct it now

So, Back to the sketch

Letter B – The Sketch

As you can see, i’ve kept the characters with few (if any) constraints. this way has been easier to freehand and eyeball as I can drag stuff around till it looks right by ‘locking and unlocking’ lines. most constraints used to create right angles, etc have been removed after to help with the process of making it 3D

Anyways, the ‘issue’ with the fillet seems to be around the place where the two control point splines meet – i’ve highlighted one in blue above.

I re-coincide each spline (have found deleting and un-deleting works, as well as hitting coincident )

That change should hopefully roll back up the timeline to allow me to make the fillet work.

To Create the key lettering I the character by 1mm elsewhere in my workspace, then move it to over the key.

Then extrude the face of the character into the key and ‘cut’ ….

this may seem odd, but it’s a really quick and easy way of consistently creating cutouts on a row of keys and making quick changes later.

That didn’t work, so, jump into surface mode – delete the entire inner arc of the B. Re-create the arc as a ‘patch’. Stitch together the lower part of the B. Then stich the whole keycap, then re-apply fillet and…..Voila…..3/4 an hour later, one filleted B…And a learned workflow if the same thing happens on another key!

Note, as-is, the keyboard fonts are a bit innacurate. I’ve sized everything based upon the smallest characters that need to fit – i.e. run stop, etc. The individual letters could be bigger – but any bigger and they’d look too big compared to those……….

Next steps,

DFM – Design for manufacture.

Just because you design a 3x2mm hole, doesn’t mean it’ll print at 3×2. Generally Filament printers do outer perimeters a little larger, inner perimeters a little smaller. The first few tests i’ve done now prove this. so, After a few months of ‘out of the box working’ on my Ender, I’ve finally gotta bite the bullet and calibrate it. The plan is to create an offset in the CAD file so that I still design the holes accurately based on measurement, BUT, can add a accurate ‘calibration figure’ Fudge figure to make them a little larger or smaller as necessary.

Right now my Printer is doing slightly oval prints – which should be easy enough to sort out if my D9 Adventures were anything to go by

C64 Mini Keyboard Progress..

Rev 2 PCB’s have arrived – 15 of them!

Now waiting on enough Arduino Pro micros and switches to start making kits up!

Each DIY kit will probably contain the following – i’ll firm up with pictures once i’m done test populating a rev2 board

  • 70 Standard switches
  • 70 Diodes – Through hole (possible SMT option also depending on price)
  • 1 USB Hub
  • 1 PCB – Rev 2 or later
  • 1 USB cable
  • two small pieces of heatshrink tubing
  • a couple of pieces of wire
  • 1 Arduino Pro micro – Pre-programmed with QMK firmware and custom Keymaps
  • Some instructions
  • a set of FDM – Filament printed keyswitches – These probably won’t be ‘perfect’ so i’ll be chucking them in as effective freebies as I won’t be releasing the keycaps as a digital file.

About that last part – I’ve spent countless hours on creating these keycaps, and still have more to go. I’ll eventually release them as a Digital file, but for now, you’ll be able to at least use the freebies to see if new keycaps are for you.

If you wanted a professionally printed set, i’ll be arranging something with a printing bureau somehow… It’s also likely i’ll be able to source reasonably costed SLA resin prints of these…watch this space

And for the money shots…….I’ve finished the top row of key text!

Now I’ve gotten the first row done, the next three should be significantly quicker.

The text is recessed into the key by about 0.4-0.6mm – between 2 and 6 layers of 3D print, not really enough to be clearly felt – but enough to be ‘seen’

After that, there’s the optimisation for printing – Filleting the edges – trialling depths and generally finding out what actually works, looks and feels good

C64 Mini – Keyboard – More CAD…

Had quite a few odd issues with my old f1 key and trying to make a full keyboard from it using the same technique

…The main problem is that I can’t really remember what I did and in what order, and there’s some odd non-parallel lines that really should be – so I’ve started again from scratch

Turns out also that there’s a few types of keyboard out there, the C64-Mini isn’t quite 50% of the keyboard i’ve been referencing

Differences are only minor – BUT it does mean that an exact 50% scale won’t fit

So, Firstly I start with the side profile sketch again.

My revised Side View – I’m ignoring the space bar right now as it’s ‘different’

C64 Mini Keyboard – ‘Invisible’ fitting mod – Part Deux- More images

Not much of an update, I put a shorter USB cable inside so thought I’d take some pictures of the top of the USB cable wiring…..

img_0679

I’ve not installed heatshrink yet on the sticky-outy USB Pins – this WILL be needed to provide strain relief – being truthful, I hadn’t expected it to work first time so didn’t bother 🙂

img_0680

Showing the complete wiring –

Joystick USB port -> USB Hub ‘output’

Keyboard -> USB Hub ‘output’

C64Mini Circuit board -> USB Hub ‘input’

There’s two free internal USB sockets now!

C64 Mini Keyboard – ‘Invisible’ fitting mod

img_0646

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 🙂

Continue reading “C64 Mini Keyboard – ‘Invisible’ fitting mod”

C64 Mini Keyboard Part 7 – More CAD -Anatomy of a keycap

C64 Keyboard Caps 5

After couple of weeks of work, I’ve finally cracked surface modelling with Fusion360 (a bit)

Here’s a bit of a step by step in creating your very own f1 Key! This is a very brief summary of what I should have done if starting from scratch, I’ve left out the trials, errors and headbanging……….

Continue reading “C64 Mini Keyboard Part 7 – More CAD -Anatomy of a keycap”

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

img_3163
Continue reading “C64 Mini Keyboard, 1/2 alive and Some CAD”

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!

Continue reading “C64Mini Keyboard – PCB Layout Success”

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…

img_0722

Continue reading “C64 Mini Keyboard mod – More Electronics Part II – OOPS”