Search found 20 matches

by funketek
Fri Oct 09, 2020 9:39 pm
Forum: Music Tech DIY
Topic: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD
Replies: 164
Views: 7188

Re: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD

Programmed Bluepill arrived in the mail today and it works like a charm! :party: Not sure if I got a bad batch of pills from random seller on aliexpress or some sort of user error on my part (most likely), but I am so happy everything is working now. The strange BPM issue I had on the original chip ...
by funketek
Sat Oct 03, 2020 12:24 am
Forum: Eurorack Modules
Topic: TINRS Rectangular Thing
Replies: 21
Views: 1368

Re: TINRS Rectangular Thing

I know what you mean about the QFN chips. Just finished my build and everything seems to be working except for the lowpass filter. That said, I'm not sure I grasp what the filter jumpers on the back do. Regardless of how the filter jumpers are set though, the lowpass should still work, right? The hi...
by funketek
Tue Sep 29, 2020 9:38 am
Forum: Music Tech DIY
Topic: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD
Replies: 164
Views: 7188

Re: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD

I am using a PC, there are a few "warnings" that I get while uploading the program, but ultimately it says "success". Anyway, I learned a lot about Platformio in the process of (semi-)programming the Bluepill, but I think going with a pre-programmed one is my best bet right now. I emailed you about ...
by funketek
Mon Sep 28, 2020 2:55 pm
Forum: Music Tech DIY
Topic: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD
Replies: 164
Views: 7188

Re: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD

Yes, the other weird issue I noticed was the shift+volume knob does alter the BPM, but only in a range of 70-92 bpm. The coding says it should go from 70-160bpm. Unfortunately, while I socketed the screen and Bluepill, I did not on the multiplexers. I de-soldered the U3 chip with hot air and put in ...
by funketek
Mon Sep 28, 2020 9:53 am
Forum: Music Tech DIY
Topic: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD
Replies: 164
Views: 7188

Re: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD

For anyone who has successfully programmed the Bluepill for this, did you need to add any #define PIN commands? I have it working as far as the screen reflecting the buttons pushes, but no sound from the OPL2 board. I have independently tested the OPL2 using some arduino sketches and it works fine, ...
by funketek
Thu Aug 06, 2020 10:27 am
Forum: Music Tech DIY
Topic: Neutron sound Dust of Time.
Replies: 261
Views: 16861

Re: Neutron sound Dust of Time.

Nevermind - seems my cheap hot plate didn't melt B4 and C31, now getting correct voltages and no smoke!
by funketek
Thu Aug 06, 2020 9:48 am
Forum: Music Tech DIY
Topic: Neutron sound Dust of Time.
Replies: 261
Views: 16861

Re: Neutron sound Dust of Time.

Not sure if this is the right place for this, but need some help troubleshooting a DOT build. Installed all of the SMD components and RECOM, but got some magic smoke from the lower 10R resistor (R3). Is there a board diagram so I can start checking the power rails? I was hoping to confirm orientatio...
by funketek
Mon Jul 27, 2020 3:51 pm
Forum: Music Tech DIY
Topic: DIY Mutable Unsuccessful Builds
Replies: 3545
Views: 215972

Re: DIY Mutable Unsuccessful Builds

Found a picture of some Stages being built on your site, Forestcaver! Looks like my configuration is correct. Thanks for the reference material!
by funketek
Mon Jul 27, 2020 3:41 pm
Forum: Music Tech DIY
Topic: DIY Mutable Unsuccessful Builds
Replies: 3545
Views: 215972

Stages Sanity check

Not technically an unsuccessful build yet, but I am confusing myself on the orientation of the RECOM DC converter. My understanding is that Pin 2 is the one by the spool and it should be in the lower right corner on the PCB. I have attached a picture of how I am planning to solder it. However, the t...
by funketek
Thu Jun 11, 2020 10:10 am
Forum: Music Tech DIY
Topic: DIY Mutable Unsuccessful Builds
Replies: 3545
Views: 215972

Re: DIY Mutable Unsuccessful Builds

Jtag de-soldering was a success! I used hot air until it just fell out and then spent about an hour with lots of flux and copper braid to get the solder out of the tiny jtag holes. Broke the tip on my soldering iron on the last one, but managed not to lift any pads on the pcb. Flashed the firmware w...
by funketek
Wed Jun 10, 2020 2:40 pm
Forum: Music Tech DIY
Topic: DIY Mutable Unsuccessful Builds
Replies: 3545
Views: 215972

Re: DIY Mutable Unsuccessful Builds

whew..

Kind of an embarrassing mistake, but thank you for being gentle!

Looking forward to de-soldering the jtag. :doh:
by funketek
Wed Jun 10, 2020 11:25 am
Forum: Music Tech DIY
Topic: DIY Mutable Unsuccessful Builds
Replies: 3545
Views: 215972

Streams JTAG issue

Hello - I just completed a Streams build but cannot flash the firmware (using STLink v2 with ST Utility application on Windows 10). AREF 2.5 and 10V are correct, however the voltage regulator is being fed 11.73V and putting out ~3.6V, not the expected 3.3. I tried changing out the voltage reg, but s...
by funketek
Wed Mar 18, 2020 9:06 am
Forum: Music Tech DIY
Topic: DIY Mutable Unsuccessful Builds
Replies: 3545
Views: 215972

Re: DIY Mutable Unsuccessful Builds

Been troubleshooting my Warps build I mentioned earlier - when giving it an input source on channel 1 & 2 I am measuring 1.63V on the DAC input (pins 19& 20), same voltage 1.63V output on the mod and aux out pins and so on, but even when I remove the audio input sources, I am still measuring the sam...
by funketek
Mon Mar 16, 2020 5:00 pm
Forum: Music Tech DIY
Topic: DIY Mutable Unsuccessful Builds
Replies: 3545
Views: 215972

Warps programmed - no lights or sounds

I completed my Warps build and measured correct voltages at all 3v3, +/- 12 and the -10 AREF points. Programmed it via JTAG with no issues (did a comparison of the target and the hex file and they matched). The issue I have is that neither LED lights up and when given an audio source I cannot hear i...
by funketek
Mon Mar 02, 2020 7:20 pm
Forum: Music Tech DIY
Topic: Diy grids fuse settings / timing confusion
Replies: 17
Views: 1028

Re:

Just wanted to confirm that this fixed my 'slow clock' DIY Grids -- Thank you! :party: Probably user error on my end, but I could not get AVRdude talking to the Grids chip via my AVRISP mkII. Instead I went through Atmel Studio 7 (free) and after re-flashing grids.hex I manually entered the lockbit,...
by funketek
Wed Feb 19, 2020 5:15 pm
Forum: Music Tech DIY
Topic: DIY Mutable Unsuccessful Builds
Replies: 3545
Views: 215972

Re: DIY Mutable Unsuccessful Builds

I cleaned the PCB with isopropyl alcohol really well and then erased/re-flashed the firmware with the ST-link and now I get the chasing LEDs when powering on along with corresponding VUmeter LEDs when feeding it an input. I wouldn't think that just scrubbing the board could have brought it to life, ...
by funketek
Tue Feb 18, 2020 10:31 am
Forum: Music Tech DIY
Topic: uO_c 8hp ornament and crime.
Replies: 339
Views: 45618

Re: uO_c 8hp ornament and crime.

Final update - all reference voltages checked out so I installed the Teensy and was able to program it. uOC still did not fire up despite hitting the "reboot" button on the Teensyduino GUI. Don't know if this had anything to do with it, but clicked the menu drop down and selected reboot instead of t...
by funketek
Tue Feb 18, 2020 12:59 am
Forum: Music Tech DIY
Topic: DIY Mutable Unsuccessful Builds
Replies: 3545
Views: 215972

Re: DIY Mutable Unsuccessful Builds

Built Clouds DIY - all 3.3V pins read correctly for power, the -10 reference is also accurate. Was able to successfully flash the clouds firmware to the device. Calibrated at 1V and 3V to note/CV and the LEDs all behaved as the manual indicated. When powering up, the unit lights up the 4 LEDs red fo...
by funketek
Thu Feb 13, 2020 11:18 pm
Forum: Music Tech DIY
Topic: uO_c 8hp ornament and crime.
Replies: 339
Views: 45618

Re: uO_c 8hp ornament and crime.

I really appreciate the guidance. I did check all of the 3v3 pins and capacitors. I noticed C3 and C8 around the around U7 were hitting ground on both sides of the capacitor. I reflowed those as well as the U7 and IC6 and no more continuity where I wasn't expecting it! I just plugged it back in and ...
by funketek
Thu Feb 13, 2020 3:48 pm
Forum: Music Tech DIY
Topic: uO_c 8hp ornament and crime.
Replies: 339
Views: 45618

Re: uO_c 8hp ornament and crime.

Hi friends - I am new to DIY, have about 5 or 6 modules successfully built including a couple of SMD boards, but this one is giving me problems. I was hoping someone with more experience than me could confirm I am on the right track: So I tried building the uOC and upon powering up, got a smoking re...

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