Search found 1039 matches

by gbiz
Tue Jun 16, 2020 5:57 pm
Forum: Music Tech DIY
Topic: performer (or is it per|former?) sequencer build
Replies: 670
Views: 38171

Re: performer (or is it per|former?) sequencer build

Back on MacOS, that "another process has device opened for exclusive access" is probably why it's failing. Another process is running that has the st-link device open & it's preventing your st-flash command from accessing it. (It might be worth updating libusb if that didn't get done when you instal...
by gbiz
Tue Jun 16, 2020 4:55 pm
Forum: Music Tech DIY
Topic: performer (or is it per|former?) sequencer build
Replies: 670
Views: 38171

Re: performer (or is it per|former?) sequencer build

Macports (like homebrew) provides up2date ports of a lot of the open source projects that MacOS doesn't include by default. If you've got brew installed then easiest is probably just install stlink using the brew installer (i think "sudo brew install stlink" will do that. Sorry for being a bit vague...
by gbiz
Tue Jun 16, 2020 4:10 pm
Forum: Music Tech DIY
Topic: performer (or is it per|former?) sequencer build
Replies: 670
Views: 38171

Re: performer (or is it per|former?) sequencer build

So here is my last attempt: Go into the "performer" directory OK Launch the VM: vagrant up OK Open a shell: vagrant ssh OK Follow the procedure described by gbiz (p13) : git clone https://github.com/westlicht/performer cd performer git submodule update --init make setup_stm32 cd build/stm32/release...
by gbiz
Thu Jun 04, 2020 6:34 am
Forum: Music Tech DIY
Topic: RS introducing a handling charge for smaller orders
Replies: 1
Views: 174

RS introducing a handling charge for smaller orders

I've just been trying to order some parts from RS & noticed no matter how much i added to the basket it added a £4.95 delivery charge, even though all items were marked as "free delivery" & the basket still had "place order before 8:30pm for free delivery". Turns out they're introducing a handling c...
by gbiz
Sat May 02, 2020 3:14 pm
Forum: Music Tech DIY
Topic: µDervish 8HP FV-1 FX
Replies: 152
Views: 17211

Re: µDervish FV-1 FX: ltd run SMD assembled full kits

No problem ! :)
I'll add "--force" to the doc so anyone else trying this will use that.
by gbiz
Sat May 02, 2020 2:33 pm
Forum: Music Tech DIY
Topic: µDervish 8HP FV-1 FX
Replies: 152
Views: 17211

Re: µDervish FV-1 FX: ltd run SMD assembled full kits

efluon, i've seen that here too. try adding "--force" to the dfu-programmer erase command. ie

dfu-programmer atmega32u2 erase --force
by gbiz
Sat May 02, 2020 3:28 am
Forum: Music Tech DIY
Topic: µDervish 8HP FV-1 FX
Replies: 152
Views: 17211

Re: µDervish: 8HP FV-1 euro FX

Edit: these kits are now all sold Something i've been meaning to do for a while, this cv-19 lockdown has given me the opportunity to put together a small number of µDervish full kits for sale ... * DSP & control PCBs with all SMDs factory pre-assembled. The ATTiny & EEPROM are programmed. The boards...
by gbiz
Thu Mar 19, 2020 1:24 pm
Forum: Music Tech DIY
Topic: Living VCO, anybody using 2 x modules?
Replies: 16
Views: 548

Re: Living VCO, anybody using 2 x modules?

I used TE Connectivity LR0204F series resistors, which are the correct physical size, they fit flush to the PCB & their legs fit the holes. I sourced mine from Farnell, but Mouser also stock them. The resistor bodies have to be 3.5 x 2mm to fit correctly. The body of a regular 0.125W resistor might ...
by gbiz
Tue Feb 18, 2020 11:39 am
Forum: Music Tech DIY
Topic: [closed] Dervish: 12HP FV-1 euro FX
Replies: 742
Views: 66296

Re: Dervish: 12HP FV-1 euro FX

I forgot, theres also "SpinCAD+Dervish.txt" in that same directory on how to use SpinCAD with dervish. That's probably closest to what you want to do here.

If you get it working & don't mind creating a basic text doc on how you did it, that others could use, i'd happily add it to the FAQs there.
by gbiz
Tue Feb 18, 2020 10:45 am
Forum: Music Tech DIY
Topic: [closed] Dervish: 12HP FV-1 euro FX
Replies: 742
Views: 66296

Re: Dervish: 12HP FV-1 euro FX

Dervish/uDervish will run any fv-1 binary, (same applies for any fv-1 based module). All you need to do is package them up into a Dervish format bank & upload them. There's a couple of FAQs that cover how to do this with the Dervish programming environment http://gbiswell.myzen.co.uk/dervish/DSP/doc...
by gbiz
Sat Feb 08, 2020 6:04 pm
Forum: Music Tech DIY
Topic: STLINK-V3SET
Replies: 11
Views: 857

Re: STLINK-V3SET

One thing i just noticed i forgot to mention above, you'll need to create a udev rule file for the v3 in the vagrant image. In /etc/udev/rules.d/ you'll find 3 rules files with names beginning "49-stlinkv". You'll need to add a similar rule file for the v3 that contains the usb id for the v3. You'll...
by gbiz
Fri Feb 07, 2020 4:08 pm
Forum: Music Tech DIY
Topic: Multimeter suggestions?
Replies: 28
Views: 1379

Re: Multimeter suggestions?

Neil, if you don't mind sharing, can you remember where you got your 3478a calibrated ?. I really should get around to replacing the battery in mine before it runs down & it's cal cert expired a while back. Post battery swap would be a good time to get it done. Sure: https://www.absolutecal.co.uk/i...
by gbiz
Fri Feb 07, 2020 3:30 pm
Forum: Music Tech DIY
Topic: Multimeter suggestions?
Replies: 28
Views: 1379

Re: Multimeter suggestions?

For bench DMM, go for HP/Agilent/Keysight. I still reckon the best value-for-pocket-money is a calibrated HP 3478A. Look for a good one eBay and then get it calibrated (change the internal battery before you get it cal'ed). Last time I got mine calibrated cost me £69 which was less than half what I...
by gbiz
Fri Feb 07, 2020 3:19 pm
Forum: Music Tech DIY
Topic: Which tool for moving tiny trim pots..?
Replies: 6
Views: 298

Re: Which tool for moving tiny trim pots..?

is there a specific tool you DIY'ers use for this though (to turn these things)? just a tiny screw driver? You need a "trimmer adjustment tool". eg https://uk.rs-online.com/web/p/trimmer-resistor-adjustment-tools/8524614/ One end is a regular screwdriver blade, the other end has a recessed blade, g...
by gbiz
Tue Jan 28, 2020 7:09 am
Forum: Music Tech DIY
Topic: High quality 2.1mm x 5.1mm DC Input option?
Replies: 2
Views: 255

Re: High quality 2.1mm x 5.1mm DC Input option?

I've just been looking for something similar for a LED lighting project i've been working on. I needed 12V @ 5A panel mounted, something that won't budge once it's in. I've ended up using RS sku 487832. They're not the cheapest, but certainly match your requirement if you need something at that curr...
by gbiz
Sat Jan 25, 2020 10:34 am
Forum: Music Tech DIY
Topic: STLINK-V3SET
Replies: 11
Views: 857

Re: STLINK-V3SET

... The Mutable VM won't see the STLINK-V3 at all even though it sees other USB devices. ... It sounds like you need to configure USB passthrough for the programmer USB id for the VM. Until that happens the host o/s will retain access to it. You can configure passthrough from the VirtualBox console...
by gbiz
Sun Dec 15, 2019 6:53 am
Forum: Music Tech DIY
Topic: [closed] Dervish: 12HP FV-1 euro FX
Replies: 742
Views: 66296

The Dervish build guide has a debugging chapter towards the end (link) . Start by working through the "Audio testing & debugging" section. That details the places you need to check. Once you've fixed the audio, if the CVs aren't working then there's a CV debugging section a couple of pages further d...
by gbiz
Fri Oct 25, 2019 6:30 am
Forum: Music Tech DIY
Topic: Desoldering braid that doesn’t suck
Replies: 24
Views: 810

Servisol Soldamop braid from RS works for me.
by gbiz
Sat Oct 12, 2019 4:05 am
Forum: Music Tech DIY
Topic: Mystery lab equipment with X Y grid and pen.
Replies: 1
Views: 383

Sounds like a plotter. https://en.wikipedia.org/wiki/Plotter

No doubt you'd find them on ebay or one of those places that specialise in refurbed lab equipment.
by gbiz
Mon Oct 07, 2019 11:29 am
Forum: Music Tech DIY
Topic: µDervish 8HP FV-1 FX
Replies: 152
Views: 17211

I've added "-p" support to eeprom_details, so now that should show the pot mappings for the programs directly from the eeprom. I just tested it here & seems to work. That's much easier :)

Download it from here & overwrite the existing "DSP/bin/eeprom_details" with it.
by gbiz
Mon Oct 07, 2019 11:12 am
Forum: Music Tech DIY
Topic: µDervish 8HP FV-1 FX
Replies: 152
Views: 17211

I just tried it here. I uploaded the default 11 bank Dervish image. It allows switching between 11 banks after i ran " fv1-edit-eeprom -m 11 , before that it was only 2 banks. So try doing that. The reason it'll only show 2 banks for you with the default Dervish image. During the reset procedure, uD...
by gbiz
Mon Oct 07, 2019 10:06 am
Forum: Music Tech DIY
Topic: µDervish 8HP FV-1 FX
Replies: 152
Views: 17211

The uDervish image only has 4 banks, so your upload worked correctly. The people who asked for a smaller form factor version of Dervish requested that it had fewer banks. For anyone who does want more banks, exactly as you're doing, the 11 bank image will work provided you increase the maximum numbe...
by gbiz
Sun Sep 08, 2019 10:32 am
Forum: Music Tech DIY
Topic: [closed] Dervish: 12HP FV-1 euro FX
Replies: 742
Views: 66296

Phew :hihi: I recall someone had a build with a similar noisy output issue that was caused by a bad solder joint on R17. But in that case the voltage on pin 26 wasn't 3V, so it was easy to find. No problem if you can't, but out of curiosity, can you remember what voltage you had on pin 26 (REFP) of ...
by gbiz
Sun Sep 08, 2019 2:55 am
Forum: Music Tech DIY
Topic: [closed] Dervish: 12HP FV-1 euro FX
Replies: 742
Views: 66296

Obviously you can't rule out it being the fv-1. But i can't think of another one that's been faulty in all the dervish/udervish builds, it'd be the first. It sounds like it's basically working if the wet signal has some semblance of the effect you're expecting. Aside from being masked by white noise...
by gbiz
Sat Sep 07, 2019 12:07 pm
Forum: Music Tech DIY
Topic: [closed] Dervish: 12HP FV-1 euro FX
Replies: 742
Views: 66296

Rotate the board to the left, that C becomes a U, which indicates it's programmed with the uDervish image. (A dervish eeprom would have D). If the eeprom wasn't programmed the clip led would be permanently on. You can easily isolate the eeprom. Short the two pins of j1 (int/ext) on the dsp board. Th...

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