#414

If I remember correctly I had a kind of random LED lighting before the firmware was flashed. I think the firmware flashing guide even mentions that some leds might be lit, might not, just flash it.

#416

Thanks so much! I was able to flash successfully but now I need to grab a keyboard and test all the ins and outs. Before I put the jacks and pot on, do you have a suggestion of how I should go about testing everything? Walk through the Teletype studies?

#417

Yeah, that’s what I did. Use the studies to familiarize yourself with the commands then pulse some gates and use a meter to make sure your CV range is the full amount. Get a simple something on each script and then trig inputs to make sure everything is working.

#418

I finished building my Teletype today (Pusherman pre-populate PCB).
It was fun and it looks good.

Everything seems to work except the CV out. No light, no voltage. I don’t know where to look for my mistake. TR outs works perfect.

Edit: I measured 3.3V on C28 and C24 and reflow U3 and U4. Reflow U2 left pins. Everything seems fine, but i have not CV output.

Edit 2: Researching and taking references I see that everything is fine … but U3 and U4 are AD5687, not AD5687R. What does not work the CV is a matter of capital R?

Thanks!

#419

the difference is that the _R parts produce an internal reference voltage.

(sorry, read your post backwards the first time… i am not 100% if we use the internal ref. or disable it via SPI at startup. let me take a closer look.)

… ok so from firmware side, it looks like we are not sending the SPI command that would disable internal reference at init. from schematic, it’s less obvious but i don’t think VREF is connected anywhere. (hopefully @tehn can correct me if i am missing it.)

so tentatively i would say that this part substitution will not work.

1 Like
#421

Thank you very much! I also don’t see the VREF connection in the schematic.

I don’t know how I could make this mistake buying. I’m looking for two AD5687R. No stock :sleepy: . If any of you have a secret supplier, please tell me.

#422

I might have some left. Where do you live?

Did anyone have problems fitting the light pipes (PLP1-350-F) to the pusherman panel? Some holes can’t fit the pipe, while others only let it half way through.

1 Like
#423

Thanks @nshe! I sent you a PM.

I used these round light pipes with the pusherman panel:
https://www.mouser.es/ProductDetail/bivar/plp1-350/?qs=RaByzyhmEWj7cqlQfXwCHg==&countrycode=DE&currencycode=EUR

The plain version was out of stock, so i try the round version and fit. I need to apply some force in 2 or 3 holes. I think the rounded version is easier to fit if there are tolerance problems.

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#424

Round pipes look beautiful too! Applying some force was the key, after several attempts it worked. Thanks!

1 Like
#425

so this doesn’t work with the teletype: AD5687BRUZ ?

#426

Should work fine, I think that’s the one I’m using. But I’ve also messed up the previous build. How could I potentially test whether it is working or not? Apparently, the module boots and responds to the basic commands correctly. Since it is an ADC, is it responsible for the in jack?

#427

In my experience you need the R model (with internal VREF) if you want that CV outs works. My DIY Teletype has the wrong model AD5687BRUZ and everything is fine except the CV output.

So go for the reference AD5687RBRUZ as the BOM says.

#428

I had the exact same problem (no CV output while triggers worked fine) and replaced the U3 and U4 but probably replaced it with nonR version… damn :slight_smile: all that trouble and I probably had the wrong chip version :slight_smile:

1 Like
#429

Updated the pusherman page with the info:

AD5687R (do not use AD5687BRUZ they will not work)