Search found 945 matches

by Grumble
Sun Aug 09, 2020 2:46 pm
Forum: Music Tech DIY
Topic: Post pics of your DIY setup!
Replies: 895
Views: 225171

Re: Post pics of your DIY setup!

DSC_0009.JPG
by Grumble
Sat Jul 18, 2020 5:32 pm
Forum: Music Tech DIY
Topic: Jan Ostman - DSP Synths
Replies: 239
Views: 38242

Re: Jan Ostman - DSP Synths

I have the dsp-l8, dsp-d8 and o2-minipops percussion synths.
You can also find them here: https://github.com/hexagon5un/jan_ostmans_synths
by Grumble
Fri Jul 17, 2020 6:06 am
Forum: Music Tech DIY
Topic: Adventurous Generator
Replies: 8
Views: 306

Re: Adventurous Generator

I have added a cv input amplifier, so I can set the output amplitude and can have an envelope as cv input. Funny extra is that now I have a thru zero amplitude control :yay: which means that if I have chosen a saw wave with the ramp on the left side when sending a positive voltage to the input, firs...
by Grumble
Tue Jul 14, 2020 12:07 pm
Forum: Music Tech DIY
Topic: Jan Ostman - DSP Synths
Replies: 239
Views: 38242

Re: Jan Ostman - DSP Synths

A great plus was when he distributed the Arduino programs for several drum modules for free so it was relatively easy to build myself, which I did several times.
by Grumble
Fri Jul 10, 2020 3:54 pm
Forum: Music Tech DIY
Topic: how to protect 5v gate in for microcontroller? [figured out]
Replies: 15
Views: 393

Re: how to protect 5v gate in for microcontroller? [figured out]

IF the processor you referring to is an atmega or attiny a resistor of a few kohm is enough since these processors have Schottky diodes to Vcc and Gnd incorporated on the chip.

I did some tests and wrote about it at here
by Grumble
Wed Jul 08, 2020 5:48 pm
Forum: Music Tech DIY
Topic: Adventurous Generator
Replies: 8
Views: 306

Re: Adventurous Generator

πŸ‘ŒπŸ»πŸ˜ƒπŸ‘πŸ»

I still have to figure out how well this dac goes *silent* by just placing the reference voltage to 0 volt...
by Grumble
Wed Jul 08, 2020 5:04 pm
Forum: Music Tech DIY
Topic: Adventurous Generator
Replies: 8
Views: 306

Re: Adventurous Generator

Very nice! It reminds me of the first digital synth I designed back in 1982. It ran on the bus of a Commodore VIC-20; the waves were stored in a static RAM chip. Used a multi-channel clock divider and a multi-channel DMA chip to read 3 channels at once from the RAM. Your demo is WAY more impressive...
by Grumble
Wed Jul 08, 2020 4:57 pm
Forum: Music Tech DIY
Topic: Adventurous Generator
Replies: 8
Views: 306

Re: Adventurous Generator

The cv for the frequency was delivered by a sequencer which also triggered an adsr envelope cv for a vca.
After that it was sent to a reverb module and to the audio amplifier.
No filter was used and the signals on the scope are directly taken from the output of the generator.
by Grumble
Wed Jul 08, 2020 1:26 pm
Forum: Music Tech DIY
Topic: Adventurous Generator
Replies: 8
Views: 306

Adventurous Generator

After discovering the free samples from the website https://www.adventurekid.se/akrt/waveforms/adventure-kid-waveforms/ I played with the thought to download some of the free sample packs and incorporate them into a eurorack module. Therefore I first had to build a eeprom programmer to program a 28c...
by Grumble
Mon Jul 06, 2020 6:46 am
Forum: Guitars, Basses, Amps & FX
Topic: Favourite Delay Units
Replies: 94
Views: 4409

Re: Favourite Delay Units



This one is my favorite :hail:
by Grumble
Mon Jul 06, 2020 6:42 am
Forum: Artist Discussion
Topic: RIP Ennio Morricone - il Maestro
Replies: 18
Views: 417

Re: RIP Ennio Morricone - il Maestro

Ennio Morricone one was responsible for many joyful hours, RIP πŸ˜”
by Grumble
Sat Jul 04, 2020 2:23 pm
Forum: Music Tech DIY
Topic: What kind of wire is this?
Replies: 35
Views: 837

Re: What kind of wire is this?

I use wirewrap wire, solidcore with heat resistant insulation. It depends on what the circuit is but in general it's not a good idea to bundle the wires like this. If there are sensitive analog signals, high speed digital signals or a mix you could end up with a whole lot of cross talk. This partic...
by Grumble
Sat Jul 04, 2020 4:30 am
Forum: Eurorack Modules
Topic: Cheapest tap tempo module?
Replies: 15
Views: 614

Re: Cheapest tap tempo module?

dubonaire wrote: ↑
Mon Apr 13, 2020 6:48 am
For tap tempo you will always need to tap more than twice though. You need to do it a few times to get your own tempo right.
No 😁

by Grumble
Sat Jul 04, 2020 1:09 am
Forum: Modular Synth General Discussion
Topic: Large components = fat sound?
Replies: 132
Views: 4885

Re: Large components = fat sound?

Conclusion: Large components=Fat sound only applies to loudspeakers πŸ˜πŸ‘πŸ»

And I’m an expert: I wiggle for over 65 years (see avatar)
by Grumble
Sat Jul 04, 2020 1:01 am
Forum: Music Tech DIY
Topic: What kind of wire is this?
Replies: 35
Views: 837

Re: What kind of wire is this?

I use wirewrap wire, solidcore with heat resistant insulation.
Looks like this:
0FE7CC5C-6064-476D-8B99-B8E13241D49E.jpeg
by Grumble
Fri Jul 03, 2020 4:26 pm
Forum: Music Tech DIY
Topic: How do I connect an oscope to eurorack?
Replies: 14
Views: 311

Re: How do I connect an oscope to eurorack?

No, unbuffered with a switch inbetween, so I can choose between 2x 4mult or 1x 8mult.
by Grumble
Fri Jul 03, 2020 12:40 pm
Forum: Music Tech DIY
Topic: How do I connect an oscope to eurorack?
Replies: 14
Views: 311

Re: How do I connect an oscope to eurorack?

I made a dual quad multi and replaced 2 3.5mm connectors with BNC connectors.
by Grumble
Fri Jul 03, 2020 12:16 pm
Forum: Music Tech DIY
Topic: Compensating charge rate in DCO?
Replies: 18
Views: 664

Re: Compensating charge rate in DCO?

Over at electro-music.com a while ago there was a thread about this.
READ more
The writer uses an Arduino to control both the charge current for the capacitor as well as the discharge timing for the capacitor.
by Grumble
Fri Jul 03, 2020 1:19 am
Forum: Music Tech DIY
Topic: Postage times for DIY with international delays
Replies: 102
Views: 2431

Re: Postage times for DIY with international delays

standard email is increasingly been put on ships or waiting at ports or customs.
I guess (hope actually) this is a typo? :sstorm:
by Grumble
Fri Jul 03, 2020 1:14 am
Forum: Music Tech DIY
Topic: Broken leg on IC Socket
Replies: 24
Views: 666

Re: Broken leg on IC Socket

Screw that "Oh no! It's messy looking" bullshit! .... Nobody is going to be back there looking to critique anyway.
:slapfight:
by Grumble
Thu Jul 02, 2020 6:10 am
Forum: Music Tech DIY
Topic: Advice on triggering the CR-78 instrument circuits
Replies: 11
Views: 285

Re: Advice on triggering the CR-78 instrument circuits

Experts are lazy ba...rds πŸ™ˆ so the least you can do is providing a link to the schematics you are referring to, or better, attach the schematics to your question....
by Grumble
Thu Jul 02, 2020 6:08 am
Forum: Music Tech DIY
Topic: Resistor Power Rating
Replies: 15
Views: 349

Re: Resistor Power Rating

πŸ‘πŸ»
by Grumble
Thu Jul 02, 2020 12:45 am
Forum: Music Tech DIY
Topic: Resistor Power Rating
Replies: 15
Views: 349

Re: Resistor Power Rating

Sure it can, it will draw the max current an opamp can deliver.
Check the datasheet for this value.
by Grumble
Wed Jul 01, 2020 4:27 pm
Forum: Music Tech DIY
Topic: Resistor Power Rating
Replies: 15
Views: 349

Re: Resistor Power Rating

No, not realy.
The max output current supplied by a regular opamp (depending on the power voltage) is usually between 20 to 50 mA.
For 82 ohms resistor you need a 0.2 watt resistor.

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