Search found 38 matches
- Tue Apr 28, 2020 5:52 am
- Forum: Music Tech DIY
- Topic: Doboz XIIO, No gates when arp/seq plays a new note? Is this not a feature?
- Replies: 1
- Views: 126
Re: Doboz XIIO, No gates when arp/seq plays a new note? Is this not a feature?
I think it only sends gate signals when the plates are pressed.
- Mon Apr 06, 2020 9:28 am
- Forum: Music Tech DIY
- Topic: Plain No Frills CV Keyboard
- Replies: 14
- Views: 1486
Re: Plain No Frills CV Keyboard
MFOS "Matrix Scanning 1V/Octave Keyboard Circuit" is designed for matrix keyboards.
- Mon Jan 07, 2019 6:55 am
- Forum: Music Tech DIY
- Topic: Project PRO2021 - A Pro-One keyboard synth
- Replies: 1281
- Views: 76183
- Tue Dec 11, 2018 10:43 am
- Forum: Music Tech DIY
- Topic: Future Sound Systems - Brunswick
- Replies: 70
- Views: 11691
Also, we're working on a manual for release, hopefully, by the end of the year. However, in the meantime, for those out there who are a little confused by the signal routing on this thing, we've drawn up a signal flow diagram, which can be downloaded here . Thank you! That's handy! I saw you guys u...
- Mon Dec 10, 2018 11:33 am
- Forum: Music Tech DIY
- Topic: Quad ADSR DIY
- Replies: 17
- Views: 1265
Go to electro-music.com/forum and visit the DIY section. Ther in the stickies at the top will be a collection of Nicolas circuits. Find the ADSR which has a simple, inexpensive build on stripboard. More better, it is a really good ADSR. Can you please link me to the post? I cant find it :despair: I...
- Sat Nov 10, 2018 12:53 pm
- Forum: Music Tech DIY
- Topic: Future Sound Systems - Brunswick
- Replies: 70
- Views: 11691
- Tue Nov 06, 2018 6:58 am
- Forum: Music Tech DIY
- Topic: Project PRO2021 - A Pro-One keyboard synth
- Replies: 1281
- Views: 76183
:woah: Would it work with other keybeds? So I've built this to give the original CPU (or the TUrbo CPU in this case) the 3 octave switch/diode matrix that it expects. It so happens that the Fatar 37 key OEM unit has this configuration. As long as the other keybed was laid out with the Make/Break sw...
- Mon Nov 05, 2018 3:48 pm
- Forum: Music Tech DIY
- Topic: Project PRO2021 - A Pro-One keyboard synth
- Replies: 1281
- Views: 76183
- Fri Sep 28, 2018 10:59 am
- Forum: Music Tech DIY
- Topic: Rakit schematics?
- Replies: 13
- Views: 1722
Have you tried their facebook group? https://www.facebook.com/rakit.kits
- Thu Sep 27, 2018 1:06 pm
- Forum: Music Tech DIY
- Topic: RYO Penta issues - help me troubleshoot?
- Replies: 39
- Views: 2362
- Wed Sep 26, 2018 4:08 pm
- Forum: Music Tech DIY
- Topic: RYO Penta issues - help me troubleshoot?
- Replies: 39
- Views: 2362
- Wed Jun 27, 2018 2:06 am
- Forum: Music Tech DIY
- Topic: Let's fix this beautiful old mixer [Satt sam 82]
- Replies: 16
- Views: 1502
- Mon Jun 18, 2018 11:41 am
- Forum: Music Tech DIY
- Topic: [IC] Eurorack blank selection packs
- Replies: 8
- Views: 618
- Sat May 26, 2018 1:02 pm
- Forum: Music Tech DIY
- Topic: Dreadbox Erebus DIY kit
- Replies: 233
- Views: 25976
Is it just me or is the vca control extremely non linear? It’s hard to coax a smooth decay or release from it, even using external envelopes. At long decay or release settings, the vca stays at full volume then just falls to zero really quick instead having a slow drop in volume. All my units behav...
- Wed May 16, 2018 1:24 pm
- Forum: Music Tech DIY
- Topic: Dreadbox Erebus DIY kit
- Replies: 233
- Views: 25976
Looking at the schematic, I think the EG is a variation of this one http://electro-music.com/forum/phpbb-files/adsr_160.jpg (from http://electro-music.com/forum/viewtopic.php?t=31473). With my limited knowledge, it seems like the 1M pot for release was replaced with a diode (D10).
- Fri May 11, 2018 5:42 am
- Forum: Music Tech DIY
- Topic: Dreadbox Erebus DIY kit
- Replies: 233
- Views: 25976
It's interesting that Dreadbox can't/won't release the schematics and they don't provide support either. Feels a bit like a black box when it comes to troubleshooting. :ripbanana: Could anyone confirm how the expo conversion works on this? I'm assuming it's done with the ATmega and a pair of DACs, s...
- Wed May 02, 2018 3:12 pm
- Forum: Music Tech DIY
- Topic: Kassutronics VCO 3340 (eurorack)
- Replies: 135
- Views: 16281
- Mon Apr 30, 2018 12:46 pm
- Forum: Music Tech DIY
- Topic: Dreadbox Erebus DIY kit
- Replies: 233
- Views: 25976
- Wed Apr 18, 2018 3:37 pm
- Forum: Music Tech DIY
- Topic: RYO Penta issues - help me troubleshoot?
- Replies: 39
- Views: 2362
I'm glad to hear you got the steps back OB1! I hope you've ordered more than one 2N7000 replacement... (Please bear in mind, I'm not an EE, just trying to trace the symptoms on the schematic) LED problem: the LEDs are controlled by the other 2N7000s (Q2-Q6). I would try to replace Q5. Range problem:...
- Fri Apr 13, 2018 2:08 pm
- Forum: Music Tech DIY
- Topic: RYO Penta issues - help me troubleshoot?
- Replies: 39
- Views: 2362
- Fri Apr 13, 2018 9:09 am
- Forum: Music Tech DIY
- Topic: RYO Penta issues - help me troubleshoot?
- Replies: 39
- Views: 2362
I think I've found the issue with mine, Q1 (2n7000) seems to be broken. By using a multimeter in continuity tester mode, the source and drain legs seems to be connected. As far as I understand electronics (and bare in mind I'm not an expert in any sense) the diode between source and drain should not...
- Thu Apr 12, 2018 1:14 am
- Forum: Music Tech DIY
- Topic: RYO Penta issues - help me troubleshoot?
- Replies: 39
- Views: 2362
Have you tried shorting the reset and clock enable pins on the 4017 (13 & 15)? Mine has similar problems (only first step is cycled), and out of curiosity, I tried to invert the clock enable and it started to behave, sort of. The 4017 has +5V on the reset pin and 0V on the clock enable, which I thin...
- Wed Apr 04, 2018 12:55 pm
- Forum: Music Tech DIY
- Topic: [IC] Euro rack blanks
- Replies: 2
- Views: 372
- Tue Feb 06, 2018 4:14 pm
- Forum: Music Tech DIY
- Topic: SEDECIM - the 16 note + gate euro module
- Replies: 24
- Views: 1182
- Tue Jan 23, 2018 10:08 am
- Forum: Music Tech DIY
- Topic: New Syncussion with MIDI and Silent power - VIDEOS
- Replies: 1009
- Views: 91951