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| Page 1 of 3 [68 Posts] | Goto page: 1, 2, 3 Next |
| Author | Message |
|---|---|
 Topic: +/- 15 V Voltage reference point |
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| jurekprzezdziecki Replies: 2 Views: 2139 |
Posted: Thu Dec 12, 2019 8:55 am Subject:
+/- 15 V Voltage reference point
Forum: DIY Hardware and Software |
| Hello,
I need to stabilise my Tune and Fine-Tuning potentiometers with a stable voltage reference point. These pots are connected to voltage supply. I can't find any solution. Anyone can advise me ... |
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| Topic: CA3080 on ebay |
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| jurekprzezdziecki Replies: 20 Views: 25188 |
Posted: Thu Dec 12, 2019 6:45 am Subject:
CA3080 on ebay
Forum: DIY Hardware and Software |
| I had some issues with 3080s bought on eBay. 2 faulted and few hours of the testing circuit to find it. Will do the test circuit for sure before I will plug the IC next time. | |
| Topic: Looking for "anywave" to sawtooth converter - anyone? |
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| jurekprzezdziecki Replies: 6 Views: 3330 |
Posted: Sat Dec 07, 2019 2:09 am Subject:
Looking for "anywave" to sawtooth converter - anyone?
Forum: DIY Hardware and Software |
| saw2tri
http://electro-music.com/forum/topic-27934.html Thanks a lot. I have tested this Roland 100m circuit in reverse in LtSpice and get some great results. I did some adjustments and get rid ... |
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| Topic: Looking for "anywave" to sawtooth converter - anyone? |
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| jurekprzezdziecki Replies: 6 Views: 3330 |
Posted: Fri Dec 06, 2019 11:53 pm Subject:
Looking for "anywave" to sawtooth converter - anyone?
Forum: DIY Hardware and Software |
| There are several triangle VCO designs on the web that include a triangle to sawtooth converter.
Google is your friend. I did it already. I have found just Ian Fritz Triangle VCO which is clos ... |
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| Topic: Looking for "anywave" to sawtooth converter - anyone? |
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| jurekprzezdziecki Replies: 6 Views: 3330 |
Posted: Fri Dec 06, 2019 7:40 am Subject:
Looking for "anywave" to sawtooth converter - anyone?
Forum: DIY Hardware and Software |
| Hello guys,
I need to add a sawtooth wave to my triangle core VCO design. Anyone, can advise a simple and reliable design? It could shape from triangle or pulse/square wave. Thanks. |
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| Topic: Sine wave multiplier circuit - any advice? |
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| jurekprzezdziecki Replies: 11 Views: 10166 |
Posted: Sun Feb 26, 2017 3:14 am Subject:
Sine wave multiplier circuit - any advice?
Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta |
| Maybe a Bode frequency shifter?
What is a DDS BTW? DDS stands for Digital Direct Synthesis, like with the Analog Devices Does that chip need to be programmed? |
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| Topic: Sine wave multiplier circuit - any advice? |
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| jurekprzezdziecki Replies: 11 Views: 10166 |
Posted: Sat Feb 25, 2017 1:43 pm Subject:
Sine wave multiplier circuit - any advice?
Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta |
| Or a pitch shifter - depending on what you want to do exactly
Hmm... frequency shifters could be a consideration. Depends how the input sine wave would look after a shift = low or high distortion? |
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| Topic: Sine wave multiplier circuit - any advice? |
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| jurekprzezdziecki Replies: 11 Views: 10166 |
Posted: Sat Feb 25, 2017 1:36 pm Subject:
Sine wave multiplier circuit - any advice?
Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta |
| I just connected 4 AC voltage sources with different frequencies and amplitudes and summed with a summing amplifier. That's all. One of the inputs is just a "base" frequency. The whole idea ... | |
| Topic: Sine wave multiplier circuit - any advice? |
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| jurekprzezdziecki Replies: 11 Views: 10166 |
Posted: Sat Feb 25, 2017 1:23 pm Subject:
 Sine wave multiplier circuit - any advice?
Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta |
| Thanks for your advice. Yes it seems like DSP or micro-controller should do the job. Someone also pointed a DDS but all of those are black magic for me.
The thing is a simulation works great so i can ... |
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| Topic: Sine wave multiplier circuit - any advice? |
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| jurekprzezdziecki Replies: 11 Views: 10166 |
Posted: Sat Feb 25, 2017 1:43 am Subject:
Sine wave multiplier circuit - any advice?
Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta |
| I need a simple multiplier circuit that works with analog sine wave at wide frequency range let's say 10 Hz > 15 kHz. I want the multiple outputs sine wave to be a 0.1, 0.2, 0.3...0.5 x f - so not ... | |
| Topic: Single transistor VCA circuit |
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| jurekprzezdziecki Replies: 79 Views: 192543 |
Posted: Wed Jan 25, 2017 4:17 am Subject:
Re: Jfet VCA
Forum: DIY Hardware and Software |
| It is possible to improve the performance of the jfet VCA by adding 50% of the signal on the drain to the gate the rationale is somewhat mathematical but basically it helps iron out the non lineariti ... | |
| Topic: Single transistor VCA circuit |
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| jurekprzezdziecki Replies: 79 Views: 192543 |
Posted: Wed Jan 25, 2017 1:36 am Subject:
Re: Jfet VCA
Forum: DIY Hardware and Software |
| It is possible to improve the performance of the jfet VCA by adding 50% of the signal on the drain to the gate the rationale is somewhat mathematical but basically it helps iron out the non lineariti ... | |
| Topic: SSM2040 - need a recommendations for filter design |
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| jurekprzezdziecki Replies: 3 Views: 3404 |
Posted: Fri Nov 25, 2016 1:15 pm Subject:
SSM2040 - need a recommendations for filter design
Forum: DIY Hardware and Software |
| hi phil,
yes it's a type-o mistake:) i would like to try this approach. i have bought many TH books but i think it could be the "filter cookbook" which i do not have. please scan it fo ... |
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| Topic: SSM2040 - need a recommendations for filter design |
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| jurekprzezdziecki Replies: 3 Views: 3404 |
Posted: Thu Nov 03, 2016 6:47 am Subject:
SSM2040 - need a recommendations for filter design
Forum: DIY Hardware and Software |
| i just have one SSM2014 ic and would like to use it in a nice build.
anyone could recommend me some nice VCF design? best J |
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| Topic: Question about Buchla Timbre circuit |
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| jurekprzezdziecki Replies: 6 Views: 10876 |
Posted: Tue Sep 13, 2016 6:32 am Subject:
Re: Question about Buchla Timbre circuit
Forum: DIY Hardware and Software |
|
Ooops, sorry... be sure you are looking at the latest version: http://users.ece.gatech.edu/~lanterma/buchla/boards/mea_timbre/mea_timbre_rev1_schem.png - Aaron Thanks for this great circu ... |
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| Topic: THONK 9 mm pots Eagle library |
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| jurekprzezdziecki Replies: 3 Views: 3535 |
Posted: Tue Sep 13, 2016 2:22 am Subject:
Re: THONK 9 mm pots Eagle library
Forum: DIY Hardware and Software |
| I haven't used them but it says it is a drop-in alternative to the common Alpha 9mm trimmers. And for those I do indeed use the EVUF.
Thanks, just realised that as well:) |
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| Topic: THONK 9 mm pots Eagle library |
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| jurekprzezdziecki Replies: 3 Views: 3535 |
Posted: Tue Sep 13, 2016 1:32 am Subject:
THONK 9 mm pots Eagle library
Forum: DIY Hardware and Software |
| Does anybody knows or owns an Eagle's library for these pots?
https://www.thonk.co.uk/shop/ttpots/ thanks in advance J PS. just've found that EVUF type is similar? |
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| Topic: Single supply VCA? |
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| jurekprzezdziecki Replies: 58 Views: 99458 |
Posted: Mon Sep 12, 2016 2:24 am Subject:
Single supply VCA?
Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta |
| Thanks again guys! It is time to get bread boarding and see what gets closest. Simulations of the MFOS one are looking ok. More distortion than I'd like but beggars can't be choosers!
EDIT: I just ... |
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| Topic: Single transistor VCA circuit |
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| jurekprzezdziecki Replies: 79 Views: 192543 |
Posted: Fri Sep 02, 2016 4:33 am Subject:
Single transistor VCA circuit
Forum: DIY Hardware and Software |
| IMO, unless you have a good technical or application-based reason to use this type of VCA, I would avoid it. I realize that it's simplicity and low cost makes it attractive, but if it sacrifices what ... | |
| Topic: TTL 7440 vco and more - help me expand the basic ideas |
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| jurekprzezdziecki Replies: 7 Views: 8375 |
Posted: Thu Sep 01, 2016 12:01 am Subject:
TTL 7440 vco and more - help me expand the basic ideas
Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta |
| I'm all for pushing the boundaries of chips that are acceptable for use in Lunettas, and with that in mind I'd like to recommend the XR2206 sine and triangle wave generator, which I discovered via thi ... | |
| Topic: TTL 7440 vco and more - help me expand the basic ideas |
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| jurekprzezdziecki Replies: 7 Views: 8375 |
Posted: Tue Aug 30, 2016 1:02 pm Subject:
TTL 7440 vco and more - help me expand the basic ideas
Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta |
| Sorry, the NAND gate approach is not bad at all. I only meant to say that it is easier to use inverting gates with Schmitt-Trigger inputs. You only need one gate per oscillator then. You could also us ... | |
| Topic: TTL 7440 vco and more - help me expand the basic ideas |
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| jurekprzezdziecki Replies: 7 Views: 8375 |
Posted: Tue Aug 30, 2016 12:25 pm Subject:
TTL 7440 vco and more - help me expand the basic ideas
Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta |
| synaesthesia - this is great, thanks a lot for these nice schematics.
i will try them on breadboard soon. the 7413 vco looks interesting. i assume there is no control voltage input? the way that c ... |
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| Topic: TTL 7440 vco and more - help me expand the basic ideas |
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| jurekprzezdziecki Replies: 7 Views: 8375 |
Posted: Tue Aug 30, 2016 7:44 am Subject:
TTL 7440 vco and more - help me expand the basic ideas
Subject description: beginner start to play witj TTL and CMOS Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta |
| Hi - i'm a beginner,
I have started a project based entirely on TTLs. the idea is to make as much as possible with use vintage TTL ics. I have them a lot, especially polish 74xxx series produced by ... |
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| Topic: Logic Noise CMOS synth series at Hackaday.com |
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| jurekprzezdziecki Replies: 35 Views: 43778 |
Posted: Mon Aug 29, 2016 1:05 pm Subject:
Re: Logic Noise CMOS synth series at Hackaday.com
Subject description: Inspired a great deal by y'all! Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta |
| Hey folks,
I'm currently writing up a weekly column at Hackaday.com on noise-making with CMOS chips. I've cribbed ideas from everywhere, naturally, including here. So I thought I'd first of all ... |
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| Topic: About this forum |
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| jurekprzezdziecki Replies: 11 Views: 39277 |
Posted: Mon Aug 29, 2016 1:02 pm Subject:
About this forum
Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta |
| Hi Howard and the forum guys,
Great to hear that. I'm really into this circuits even though i'm a beginner. I have a great stock of polish CMOS and TTLs made by polish company named CEMI. i have a ... |
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| Page 1 of 3 [68 Posts] | Goto page: 1, 2, 3 Next |
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