#82

Hi All!

Just wanted to drop a note and let all those interested that I’m still plodding along with this - but as I’ve stated previously, I have a lot of competing priorities (work, travel, etc.) and an insufficient parts inventory (which creates some longer-than-desired shipping delays). That said, I’ve had some progress and feel that sharing status here is overdue.

Current Status:

Prototyped the faceplates for the I and the O. The O is fully wired up to headers and ready for testing. I’ve also done the basics getting a pair of Teensy processors chatting and sharing data (both via transmit and polling).

Here are a couple of shots of my progress from my Instagram acct:

I’m pretty clear on what I’m doing for the circuits for the triggers and the CV IO; and, yes, I’ve thrown away the idea of trying to filter up the PWM outputs - even with all of the Teensy’s extended capabilities all we get out is a noisy twelve-bit signal with, as @gloom_and_glare put it, lots of needless circuitry. The DACs have arrived and are next in the queue.

Right now, I’m trying to get the Teensy responding to some White Whale i2c commands. It’s early days and just hooking it up, setting the right addresses and crossing my fingers didn’t produce any tangible results. Need to dig a little deeper…

All in all, having a good time with this. But, trust me, this is going to take quite a while given all of the work and travel that I have ahead of me - not counting all of the learning and re-learning on the job that I’m doing. Additionally, the tight footprint makes developing and designing all the more challenging. Apologies if anyone’s hopes were up that this will be a near-term reality.

Note: thx to @c1t1zen for the awesome Proto Vero boards; they make hacking Eurorack oh so much more fun!! :slight_smile:

Cheers!

b

10 Likes
#83

Thanks for the update. Excited you’re still working on it. Thanks for carving out time in your busy life!

1 Like
#84

Stoked this is still happening, thanks for the update!

#85

Fantastic to see the progress on these!
Definitely excited for the expanders, whenever they fully materialize.
Keep up the good work!

#86

These expanders play a big part in my future plans for teletype, so thanks so much for the continued effort. I’ll be as near to the front of the queue as possible if (hopefully when!) these make it into production :slightly_smiling:

#87

Awesome news. Really looking forward to these!

#88

Hey i just discovered this tread and feel a little bit late to the party to ask but: Are you planning to make the knobs acting like the original PARAM one if nothing is plugged in the IN ??? That would be terrific :relaxed:

#89

Hey @martinmestres - the way I’m planning is to have it be independent electrically, so that we can have it as a completely separate value and use it how we wish (on its own or to attenuate another value). That way, it will always work.

#90

This is clever :slightly_smiling: As I m always complaining of physical interaction with my teletype (but deeply love it anyway) you can count me in.

#91

Quick update from the lab on the Teletype Expander Project.

In summary, progress … but still a ways to go yet. :slight_smile:

1 - It’s rock-and-roll with the blinking and pulsing (this demo is not controlled by the Teletype):

2 - Finally wired up the proto board for the Input Module:

3 - Wiring the two panels with a pair of Teensys:

4 - Implemented the Output Command Set for the 4 CV outputs and have one Teensy sending messages pretending to be a Teletype and the output module responding properly. This includes SLEW and OFFSET (not pictured in this video). Red blinking lights in the background indicate data transmissions over i2c between the two Teensys:

Next steps:

  1. Implement the trigger code for the output module (should be simple as the framework is now totally in place).

  2. Integrate the DAC into the output module (for CV).

  3. Proto-test the outbound circuitry for one channel of each (circuit protection, etc.).

  4. Integrate with the Teletype (have a few questions for @tehn on this one).

  5. Layout the board and print some fab prototypes.

  6. Test and repeat #5 if needed.

CHEERS!!

b

11 Likes
#92

So excited! Looks sweet! My teletype needs friends!

1 Like
#93

Hear, hear. More dance partners. Can’t wait!

1 Like
#94

If you want an extra set of eyes on the schem/pcb shoot me a DM and I’d be happy to take a look.

2 Likes
#95

This is beyond exciting!

2 Likes
#96

I don’t know how to help, but i give you massive telepathical support !

2 Likes
#97

It looks like www.fontsbyalex.com has been hijacked. It’s redirecting my browser to spam sites.

#98

well

that’s unfortunate

#99

free here:

https://www.myfonts.com/fonts/fonts-by-alex/core-humanist-sans/

#100

Mini-Update: code for the TELEX-0 is in place; replicated the latest 1.1 functionality for the 4 CV and 4 Gate outputs. (This includes POLARITY and KILL.) Whipped together a quick node.js application to fake the Teletype commands and test the behavior against a real Teletype. Check it out (some of the debug values won’t make sense - ignore them):

Next step: integrate the DAC 8564. Planning to hit this over the weekend.

Cheers!

b

9 Likes
#101

Hell yeah ! that’s happening !