#1590

If you are in Europe, thonk is a good source for jacks and pots. Headers I usually get at mousers, or tayda ://www.taydaelectronics.com/connectors-sockets/pin-headers.html

1 Like
#1591

Ok thank you Iā€™m in New Hampshire
is there a better build of materials somewhere I can reference
Or do I have to copy and paste
from github bom ?

#1592

The BOM on github has everything.

1 Like
#1593

Quick one: just wanted to double-check the Teensy is mounted the same way up on the back of the TXi as it is on the TXo (ie with USB socket at top).

Also, is it correct that you canā€™t change the waveform when using the TXo CV outputs in LFO mode (ie using TX.OSC.LFO etc.)?

#1594

Teensy are mounted the same direction, usb jack up.

image
image740Ɨ555 72.4 KB

The CV output can do any waveform at any supported rate. The LFO option is just a different way of specifying the scale of oscillation - that is why it lives under the OSC function adjacent to FQ, CYC, and N (to name a few).

Remember, WAVE goes in increments of 100 to allow blending between the waveforms.

This sequence will create a Sawtooth LFO that runs from -10V to +10V at a rate of 150mHz:

TO.CV.SET 1 V 10
TO.OSC.LFO 1 150
TO.OSC.WAVE 1 200
4 Likes
#1595

Oh, great, thanks for the info, @bpcmusic. Both expanders seem to be working, now :slight_smile:

1 Like
#1596

Hi, anyone can help with the Teensy Loader? If I load the TELEXoPlus.v.021B in, it says ā€œtoo largeā€. The TELEXo-none-Plus file works. Its says there 92% used. So whats this limitation?
It is show even without connection the teensy 3.6 to my windows PC.
Any idea? Thank you!
grafik

#1597

Have tried flashing it? I think Iā€™ve seen that error before with some ornament and crime firmware but flashed fine all the same.

#1598

CanĀ“t push the program button. It seems that I need not the older (?) Teensy Loader but the Teensyduino. Just trying to install everything needed. But thanks for your fast reply @jmsiener!

#1599

So I donā€™t know whatā€™s up but I downloaded the zipped .hex file as well as the uncompressed and itā€™s showing up at 78% on both. Iā€™m rather certain that Iā€™m using the most recent teensy loader application. I havenā€™t installed Teensyduino in 2-3 years because getting a known working hex and using the loader is so much simpler and easier.

Edit: I got the same error when I plugged a Teensy 3.2 in and checked it. Are you using a Teensy 3.2 or 3.6? The plus version is going to be too big for a regular 3.2.

#1600

Funny - I was just PMing with @yoyosandshoes about the same thing. After some research, it looks like the Teensy loader remembers the last Teensy it talked to and does the size calc based on it. On a new install, it must default to some older, smaller Teensy. Hence the ā€œtoo largeā€ message.

The message boards over at the Teensy site suggest flashing anyway and the message should go away. You can initiate the flash by pressing the button on the Teensy.

2 Likes
#1601

BIG EDIT: Simply used wrong cable!! :upside_down_face: Everything works now. Thank you guys!!
Very good hint Brendon, thanks!
It is like you described: A few months ago I got a original Telexo and flashed the newest firmware. And now I built a Telexo+ by my ownā€¦
Yes, I can initiate that the Teensy is ready for flashing. But it doesnĀ“t seem that it really flashes, as the Teensy loader doesnĀ“t give any feedback and the only button which I can press there is ā€œAutomatic Modeā€.
@yoyosandshoes: How did it worked out for you? Really that simple? I will search how to delete the memory of the teensy loader and will come back to share further infos. It seems not as easy as it is a .exe which can`t be simply de- and reinstalled.
EDIT: Just attempted it on my mac - the teensy loader was never before installed there (https://www.pjrc.com/teensy/loader.html). But curiously there was the same problem.

Imgur
Imgur

3 Likes
#1602

Lol, I know your pain. It seems like every other micro usb cable I grab delivers power but not data.

3 Likes
#1603

I havenā€™t had the chance to work through it yet and it will a week or so before I do but I am watching this thread and will report back when I can

2 Likes
#1604

Wow - those black panels look great. Wonderful build!! Glad to see that youā€™ve had success! :slight_smile:

Off-Topic Cable Rant

Funky cables get me from time to time. Just spent a few hours tearing my hair out with my Norns until I realized that the cable was a dud. I find it mind-numbing that their isnā€™t better labeling in the industry for the different types of cables. And weā€™ve just been blundering into the same nightmare with USB-C. Sigh.

1 Like
#1605

Just reporting back that it appears I used the wrong cable for flashing the teensy too. I got the hex too large error again but then it allowed me to do manual loading which seems to have worked. Thanks all for the help and @bpcmusic for the support in dms.

1 Like
#1606

I am bringing the dm discussion with @bpcmusic here for otherā€™s benefitā€¦

i got the teensy flashed i think but am not getting response over ii2c from teletype. When powered up the telexo has the three top lights on with 1 being brightest . No trigger or cv commands are working. The repairer checked the hardware a few weeks ago and said it appaered to be working.
I have tried the stock firmware and the beta.
Any further trouble shooting ideas? Maybe i am close?

edit: the light on the teensy is flashing when connected to the module and powered on

@bpcmusic repliedā€¦
for the TXo, the LED is not enabled in the default configuration. That is, it should not be blinking. That with your oddly lit LEDs suggest that the Teensy is running the ā€œBLINKā€ default program and has not been flashed successfully.

I will be reflashing and will update when i get the chance. Thanks

Edit to say that I was not flashing the teensy properly. Thanks all and thanks for your patience @bpcmusic

1 Like
#1607

I recently buit a telex, TXi, TXo, TXb, and TXn - and the good news is, they are mostly functional! TXoā€™s TR LEDs are quite dim, even though it has 5V out on every one. Any idea where to look for that glitch? And TXi ch2 isnā€™t working - Iā€™ll have to take it apart and see if I can find anything. Any recommendations would be appreciated!

1 Like
#1608

The TXo is a +/- 10V unit. Set a CV output at full value to see the LED lit at full. Source code has a lookup table for brightness if you wanna mod the levels. If full max still isnā€™t bright enough, you can always change the LED resistor values. (I think I shared the stats for the LEDs that I used somewhere.) :slight_smile:

As for your TXi - Iā€™d just trace the signal to make sure that you have continuity and no shorts. Prime suspect areas are a) on the Teensy, b) on the board interconnects, and c) on the Op Amp. Iā€™d also do a quick check that the jack is good (plug a cable and ensure continuity). Though, of the hundreds that Iā€™ve built - I never had a bad jack. :slight_smile:

#1609

Ahā€¦ of course it is 10V! So that one is working 100%! Iā€™ll figure out the other problem - shouldnā€™t be too hard. Thanks for the quick response, and the awesome modules. Quick question for you - why the 0402 components? There is so much room left on those boards you probably could go 0603. Maybe next time. :grin: