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| Page 1 of 8 [185 Posts] | Goto page: 1, 2, 3, ..., 6, 7, 8 Next |
| Author | Message |
|---|---|
 Topic: crackle synthesizer |
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| nicolas3141 Replies: 3 Views: 4525 |
Posted: Wed Mar 08, 2017 3:27 am Subject:
crackle synthesizer
Forum: DIY Hardware and Software |
| I have started from the steim circuit and derived a very similar circuit with no hard to find parts (all discrete) and a couple of small enhancements.
http://electro-music.com/forum/viewtopic.php?t ... |
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| Topic: Very simple sawtooth VCO (V/Hz) |
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| nicolas3141 Replies: 92 Views: 187354 |
Posted: Tue Jun 07, 2016 12:59 am Subject:
Very simple sawtooth VCO (V/Hz)
Forum: DIY Hardware and Software |
| Ok, I would try switching to somewhat smaller resistors, say 10-22K, and in parallel with both resistors put an electrolytic cap, say 33-100uF. If you can still hear some noise, you could also add in ... | |
| Topic: Very simple sawtooth VCO (V/Hz) |
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| nicolas3141 Replies: 92 Views: 187354 |
Posted: Sun Jun 05, 2016 10:11 pm Subject:
Very simple sawtooth VCO (V/Hz)
Forum: DIY Hardware and Software |
| The issue mentioned with bad sound from a power supply choice is hard to diagnose without more info, but here are some suggestions:
- it could be insufficient buffering caps on the 0V virtual groun ... |
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| Topic: Very simple sawtooth VCO (V/Hz) |
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| nicolas3141 Replies: 92 Views: 187354 |
Posted: Mon May 23, 2016 1:14 pm Subject:
Very simple sawtooth VCO (V/Hz)
Forum: DIY Hardware and Software |
| Yes, this circuit works well with +/-4.5V from a 9V battery and virtual ground type setup, just make sure to either buffer the virtual ground with a third opamp or put a decent sized cap on it to keep ... | |
| Topic: ADSR |
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| nicolas3141 Replies: 31 Views: 23872 |
Posted: Sat May 21, 2016 3:59 am Subject:
ADSR
Forum: DIY Hardware and Software |
| Yes, the NPN solution should work well. Let us know what configuration works best.
But the sensitivity to false triggering is also a problem that comes from not having the ability to go below zero ... |
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| Topic: ADSR |
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| nicolas3141 Replies: 31 Views: 23872 |
Posted: Wed May 18, 2016 3:33 am Subject:
ADSR
Forum: DIY Hardware and Software |
| Here is a drawing of what I am talking about - a 1.2V virtual ground which will allow the PNP to get properly biased, but will create a 1.2V offset in the output, so we add a 1.2V level shifter as a f ... | |
| Topic: ADSR |
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| nicolas3141 Replies: 31 Views: 23872 |
Posted: Wed May 18, 2016 2:58 am Subject:
ADSR
Forum: DIY Hardware and Software |
| You can see in the datasheet graph that even though a feature of the chip is that the output can go all the way down to the -ve supply voltage, the current capabilities get pretty limited. If you wan ... | |
| Topic: ADSR |
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| nicolas3141 Replies: 31 Views: 23872 |
Posted: Wed May 18, 2016 2:40 am Subject:
ADSR
Forum: DIY Hardware and Software |
| To run this ADSR on a single supply without major modification to the circuit I would use a couple of resistors and an extra opamp to create a virtual ground. If you are building a module which will ... | |
| Topic: ADSR |
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| nicolas3141 Replies: 31 Views: 23872 |
Posted: Tue May 17, 2016 1:04 am Subject:
ADSR
Forum: DIY Hardware and Software |
| The reason you need a dual supply for this type of ADSR is that the PNP needs a negative voltage on its base (at least -0.7V negative) in order to fully drain the cap during the Release phase when the ... | |
| Topic: ADSR |
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| nicolas3141 Replies: 31 Views: 23872 |
Posted: Sat Apr 16, 2016 4:35 am Subject:
ADSR
Forum: DIY Hardware and Software |
| Great to see some interesting ideas. I find it fascinating that it is still possible to come up with new options for an ADSR after all these years, and without needing to resort to any components bey ... | |
| Topic: General purpose arduino / synth circuit |
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| nicolas3141 Replies: 7 Views: 11737 |
Posted: Wed Nov 25, 2015 2:41 am Subject:
General purpose arduino / synth circuit
Forum: DIY Hardware and Software » Arduino |
| Cool. I am still progressing slowly with the software side. What should be feasible for those who have built VCF and VCA modules prior to building this arduino module, is that we should be able to p ... | |
| Topic: General purpose arduino / synth circuit |
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| nicolas3141 Replies: 7 Views: 11737 |
Posted: Sun Nov 22, 2015 2:28 am Subject:
General purpose arduino / synth circuit
Forum: DIY Hardware and Software » Arduino |
| Some build pictures to show you how I suggest to mount the arduino off the stripboard with the resistors between. | |
| Topic: General purpose arduino / synth circuit |
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| nicolas3141 Replies: 7 Views: 11737 |
Posted: Sun Nov 22, 2015 2:11 am Subject:
General purpose arduino / synth circuit
Forum: DIY Hardware and Software » Arduino |
| A few other people are in the process of building this and while helping them I noticed a minor error in the layout - now corrected in the diagram above. The resistors to ground at the bottom of the ... | |
| Topic: A collection of circuits by Nicolas |
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| nicolas3141 Replies: 35 Views: 148472 |
Posted: Sun Nov 15, 2015 12:41 am Subject:
A collection of circuits by Nicolas
Forum: DIY Hardware and Software |
| Having a go at arduino tinkering - http://electro-music.com/forum/topic-65389.html | |
| Topic: General purpose arduino / synth circuit |
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| nicolas3141 Replies: 7 Views: 11737 |
Posted: Sun Nov 15, 2015 12:38 am Subject:
General purpose arduino / synth circuit
Forum: DIY Hardware and Software » Arduino |
| Here are my programming experiments so far - basically trying to test everything to prove it works and see how far we can go with the little arduino and this simple circuitry. What I am finding is th ... | |
| Topic: General purpose arduino / synth circuit |
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| nicolas3141 Replies: 7 Views: 11737 |
Posted: Sun Nov 15, 2015 12:22 am Subject:
General purpose arduino / synth circuit
Forum: DIY Hardware and Software » Arduino |
| From a software point of view I am using this library for the midi stuff:
https://github.com/FortySevenEffects/arduino_midi_library/releases/tag/4.2 |
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| Topic: General purpose arduino / synth circuit |
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| nicolas3141 Replies: 7 Views: 11737 |
Posted: Sun Nov 15, 2015 12:19 am Subject:
General purpose arduino / synth circuit
Forum: DIY Hardware and Software » Arduino |
| Schematic and layout - slight correction in the layout (22 Nov 2015). | |
| Topic: General purpose arduino / synth circuit |
|
| nicolas3141 Replies: 7 Views: 11737 |
Posted: Sun Nov 15, 2015 12:11 am Subject:
General purpose arduino / synth circuit
Forum: DIY Hardware and Software » Arduino |
| I have just built a basic arduino circuit with these goals:
- using components I had to hand (arduino pro mini 5V, LM358, 6N137). - midi in. - midi out. - CV in. - CV out. - audio in. - ... |
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| Topic: Touch sensitive mini synth |
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| nicolas3141 Replies: 13 Views: 8500 |
Posted: Sat Sep 26, 2015 4:16 pm Subject:
Touch sensitive mini synth
Forum: DIY Hardware and Software |
| If you are building this as a separate unit with output to headphones then the transformer can be avoided. Or add a battery powered amp like an LM386 and include a speaker in the unit, to do this jus ... | |
| Topic: Simple but fun bleepy machine |
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| nicolas3141 Replies: 53 Views: 51407 |
Posted: Wed Sep 23, 2015 4:07 am Subject:
Simple but fun bleepy machine
Forum: DIY Hardware and Software |
| Zero volts is labelled 0V on the bleepy schematic and is available on multiple tracks of the stripboard - most of the pots have this on one pin. If the sequencer has nothing labelled zero volts then ... | |
| Topic: Touch sensitive noise - cracklebox derivative |
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| nicolas3141 Replies: 6 Views: 4912 |
Posted: Sun Jun 07, 2015 2:49 am Subject:
Touch sensitive noise - cracklebox derivative
Forum: DIY Hardware and Software |
| Connecting an input signal across TP1 and TP5 works well. Just played a gig that went very well with my two oscillator bleepy machine circuit running through this one to provide 'effects' : )
Will s ... |
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| Topic: Touch sensitive mini synth |
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| nicolas3141 Replies: 13 Views: 8500 |
Posted: Tue May 26, 2015 4:05 am Subject:
Touch sensitive mini synth
Forum: DIY Hardware and Software |
| corrected version. I have tweaked a few of the component values in the BOM. If you have trouble with the filter oscillating too much try a smaller value for R14. TP4 and TP5 are not very useful. T ... | |
| Topic: Touch sensitive mini synth |
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| nicolas3141 Replies: 13 Views: 8500 |
Posted: Tue May 26, 2015 4:01 am Subject:
Touch sensitive mini synth
Forum: DIY Hardware and Software |
| There were some errors in the BOM I posted earlier, so I have removed those and am uploading this corrected version. The filter needs to be on the edge of oscillating to sound interesting, but if it ... | |
| Topic: Touch sensitive mini synth |
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| nicolas3141 Replies: 13 Views: 8500 |
Posted: Tue May 26, 2015 12:00 am Subject:
Touch sensitive mini synth
Forum: DIY Hardware and Software |
| Here is a stripboard layout. Not verified yet as the prototype I have built is a bit messier. Offboard connections not shown, but should be easy to work out.
Nicolas |
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| Topic: Touch sensitive mini synth |
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| nicolas3141 Replies: 13 Views: 8500 |
Posted: Mon May 25, 2015 4:46 am Subject:
Touch sensitive mini synth
Forum: DIY Hardware and Software |
| No sound samples yet for this one. Will see what I can do next week. The vco is a normal saw sound, the filter is a weakish bandpass which can sound a bit resonant if you treat it right. Not the be ... | |
| Page 1 of 8 [185 Posts] | Goto page: 1, 2, 3, ..., 6, 7, 8 Next |
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