#327

My experience of a pre populated pcb of pusherman.

Fix CV output voltage limit is:

And fix Trigger output voltage limit is:
Replace pre populated resistors R37, R38, R46, R47 about 10 ohm to 20k.

(PCB manufacturing lot may be vary. So the experience may differ.)
(I’m positive because pre populated PCB is very helpful for my hand soldering skill.)
(edit): About this time, additional work needed. Thanks to community for resolving.)

#328

…not so much if you end up having to replace a lot of the components (as you seem to have had to).

1 Like
#329

Next, I’m planning to connect DIY teletype
with PS/2 keyboard (by serial port),
DIY grid AND DIY arc by usb or i2c or serial port
with modifying firmware.
Has anyone already tried similar idea?
(It may be so hard project for me. So alternate way, I will get Ansible etc module if I can find.)

#330

sorry off topic. I’m newbie of monome platform.
After rethinking, using usb keyboard may be the best use case of Teletype as live coding macro sequencer for me.
I will plan to use Grid and Arc with Norns etc.

#331

I used a Dremel tool to cut all the pins off U3, and cleaned up the little bits left behind. Soldered in a new U3, and LO-it all works! Thanks to all for talking me through the possibilities. I had a moment of self doubt last week, and I ebay’ed a used teletype for $275. I also ordered another U3 DAC that got here first. Two teletypes? The possibilities!

20200904_151334
20200904_1513344032×1960 2.61 MB

5 Likes
#332

One last bug solved. This one is weird enough I’m posting it. My input jack’s voltage divider wasn’t working, so it would max at 3.3V due to the protective diodes. Turns out a tiny via to AGND wasn’t connected on my pusherman board. Weird manufacturing defect. Here is my quick fix:

20200907_102523
20200907_1025231960×4032 2.01 MB

3 Likes
#333

These kind of bugs are so mean. I remember having a circuit board on which two tracks were connected which shouldn’t be. Don’t know how often I reflowed things, searched for shorts between components, took of components, replaced… it drove me crazy :exploding_head:

Nice that you found out!!

#334

What’s the module at the left of the case?

1 Like
#335

@reijo - yes, I can’t believe I found it in 30 minutes. This kind could take much longer. It helps that all the circuit needs to do is divide a voltage - it wasn’t doing that, and all the resistors were the right values in the right place, only thing left was that ground wasn’t ground. Lucky this time!

2 Likes
#336

@toneburst - a seismic industries compute module prototype. It is a TT (the other TT - a mxmxmx terminal tedium) running ORAC - super powerful and easier to grok than a teletype. Raffi is currently trying to make it even smaller - and he’s notorious for ultra-slim module depths

1 Like
#337

Cool. I have a TT board, but the lack of a builtin screen put me off ever getting round to assembling it. This version looks like a better bet.

#338

@toneburst, If you ever get the urge, build the TT and add a couple of oleds… easy to do. Orac works with that combo now. @okyeron and I got it working a couple years ago:

2 Likes
#340

I prefer the slightly more integrated look of the screens on the Seismic version, to be honest.

I’m aware of ORAC, as I’ve installed it on my Fates. It’s a very cool thing!

#341

So, in a moment of self doubt, I bought a used teletype (stock early version, I believe). I was eager to see how the screen mounts (spacers, connectors) to see if I can do better with mine. Its screen is at a wonky angle… is that normal?

20200910_183306
20200910_1833064032×1960 2.28 MB

#342

Hi guys,

Quick question I’ve ordered the 64kb flash MCU but is that enough ?, just realising there are a few flavors of the MCU that can go up to 512kb flash.

thanks

#343

Man, I know this doesn’t really help answer your question but I thought it might be handy for others to see. I used the legs from a bunch 1N4001 diodes instead of the pin header to get this sort of profile but I use the female header listed in the BOM so the screen is still removable.

image
image3024×4032 2.9 MB

#344

@jmsiener, yes it is helpful. I bought the low profile header that @okyeron uses for fates, and put the screen header through the top of the screen, clipping the top leads off. That worked well, will take a photo next time it is apart. Just wondering about the tilt on the stock one before I plug it in.

#345

the tilt is fine, not even noticeable in use.

2 Likes
#346

Yeah I’m pretty sure 64kb is not enough, stock Teletype uses the 512kB chip for sure and there is a lot of storage used by patterns and such, as well as just all the continually growing firmware code.

2 Likes
#347

pusherman did a restock of teletype pre populated boards, does anyone know if the errors in the components have been corrected?