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| Page 1 of 17 [421 Posts] | Goto page: 1, 2, 3, ..., 15, 16, 17 Next |
| Author | Message |
|---|---|
 Topic: Adding a cycle input to the CGS Universal Slope |
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| Dave Kendall Replies: 2 Views: 3459 |
Posted: Wed Sep 22, 2021 6:17 am Subject:
Adding a cycle input to the CGS Universal Slope
Forum: DIY Hardware and Software » Ken Stone designs - CGS |
Have a look at the schematic for the CGS 75. It's a modified USG with a cycle switch  |
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| Topic: What to do with unused half of LM13700? |
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| Dave Kendall Replies: 6 Views: 4525 |
Posted: Sat Feb 10, 2018 10:16 am Subject:
What to do with unused half of LM13700?
Forum: DIY Hardware and Software |
| @ JovianPyx - great tip for op amp usage - Nice one |
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| Topic: What Do You Think Is The Clock out on PT2399 is for? |
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| Dave Kendall Replies: 25 Views: 21167 |
Posted: Sun Jun 04, 2017 4:14 pm Subject:
What Do You Think Is The Clock out on PT2399 is for?
Forum: DIY Hardware and Software |
| oops - my bad. . . thinking of the wrong chip. Doh! | |
| Topic: What Do You Think Is The Clock out on PT2399 is for? |
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| Dave Kendall Replies: 25 Views: 21167 |
Posted: Sun Jun 04, 2017 4:01 pm Subject:
What Do You Think Is The Clock out on PT2399 is for?
Forum: DIY Hardware and Software |
| A thought - depending on how it behaves, possibly CLK out on the PT2399 could be used for linking another PT2399, giving stereo or ping-pong delays. | |
| Topic: Turning an on-off-on switch into a three-way selector |
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| Dave Kendall Replies: 13 Views: 10868 |
Posted: Sat Jan 03, 2015 8:13 am Subject:
Turning an on-off-on switch into a three-way selector
Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta |
| For the record, you can make a single pole one-to- three position switch with just a Dual pole on-on-on toggle. Attached diagram courtesy of Fonik. (Schalterkontact = Switch contact. )
cheers, Da ... |
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| Topic: minimoog filter/vca board |
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| Dave Kendall Replies: 6 Views: 9347 |
Posted: Sun Dec 28, 2014 1:30 pm Subject:
minimoog filter/vca board
Forum: Wanted, For Sale, Opportunities and Requests » Parts and Components |
| Hi Don.
Here ya go..... http://www.ebay.co.uk/itm/Moog-Minimoog-Model-D-Replacement-Faceplate-/301114110956?pt=Keyboards_MIDI&hash=item461bccb3ec cheers, Dave |
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| Topic: minimoog filter/vca board |
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| Dave Kendall Replies: 6 Views: 9347 |
Posted: Wed Nov 26, 2014 5:44 pm Subject:
minimoog filter/vca board
Forum: Wanted, For Sale, Opportunities and Requests » Parts and Components |
Seems like spuddo is sorted then ! 
There's a guy in the States selling new Minimoog front panels. If only I had the money. . . cheers, Dave |
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| Topic: minimoog filter/vca board |
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| Dave Kendall Replies: 6 Views: 9347 |
Posted: Wed Nov 26, 2014 3:11 pm Subject:
minimoog filter/vca board
Forum: Wanted, For Sale, Opportunities and Requests » Parts and Components |
| Hi Spuddo.
There are complete boards [url=http://www.ebay.co.uk/itm/Minimoog-vcf-board-New-tested-/311156777269?pt=UK_Musical_Instruments_Pro_Audio_Synthesisers_CV&hash=item487263a135]here. A b ... |
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| Topic: Where can I find info on speech synthesizers? |
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| Dave Kendall Replies: 11 Views: 6144 |
Posted: Fri Aug 15, 2014 1:38 pm Subject:
Where can I find info on speech synthesizers?
Forum: DIY Hardware and Software |
| Jim Patchell designed a vocal formant filter PCB, and Fonik built one from Jim's posted files. I believe it's voltage controllable, which gets you a little further along the way towards good control, ... | |
| Topic: wildcat VS SH101 Slide-Glide (solved) |
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| Dave Kendall Replies: 9 Views: 6951 |
Posted: Wed May 07, 2014 4:46 am Subject:
wildcat VS SH101 Slide-Glide (solved)
Forum: DIY Hardware and Software |
| Hi Isak.
OK - couple of questions, and some thoughts. . . . What make is the MIDI2CV unit you are using? With the xox connected in GATED mode to the EFM slide, what is the GATE output when on ... |
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| Topic: wildcat VS SH101 Slide-Glide (solved) |
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| Dave Kendall Replies: 9 Views: 6951 |
Posted: Sun May 04, 2014 6:06 pm Subject:
wildcat VS SH101 Slide-Glide (solved)
Forum: DIY Hardware and Software |
| Hi Isak.
Do you have access to an oscilloscope? I think the key to this is to look at exactly what GATE signals the XOXbox and the MIDI2CV are outputting. If CV and GATE are the only two connection ... |
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| Topic: I need a very simple mixer |
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| Dave Kendall Replies: 12 Views: 9456 |
Posted: Wed Feb 12, 2014 1:28 pm Subject:
I need a very simple mixer
Forum: DIY Hardware and Software |
| You might want to check out the TL061 - it uses quite a bit less current than the TL071, at the expense of some slight increase in noise. In practice any extra noise was not noticable in the one I bui ... | |
| Topic: 4mm or 3.5mm Jack |
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| Dave Kendall Replies: 3 Views: 2676 |
Posted: Tue Jan 07, 2014 12:28 pm Subject:
4mm or 3.5mm Jack
Forum: DIY Hardware and Software |
| Some thoughts. .
The major advantages of 3.5mm jacks are probably normalisation, and compatibility with standard eurorack modules. Normalisation can cut down the number of front panel components ... |
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| Topic: CA3080 revived |
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| Dave Kendall Replies: 30 Views: 25246 |
Posted: Tue Dec 31, 2013 11:27 am Subject:
CA3080 revived
Forum: DIY Hardware and Software |
| Hi.
Something for the melting pot. . . [url=http://www.idea2ic.com/LM13600/LM13600.txt]this link within the main body of the earlier link explains exactly what the difference between the LM13600 an ... |
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| Topic: CA3080 revived |
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| Dave Kendall Replies: 30 Views: 25246 |
Posted: Sat Dec 07, 2013 8:00 am Subject:
CA3080 revived
Forum: DIY Hardware and Software |
| Nice one. I think there'll be a lot of people happy about that.
cheers, Dave |
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| Topic: CA3080 revived |
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| Dave Kendall Replies: 30 Views: 25246 |
Posted: Sat Dec 07, 2013 7:03 am Subject:
CA3080 revived
Forum: DIY Hardware and Software |
| Looks hopeful. Found a post on DIYstompboxes.com about it. Here's an excerpt.
I've been in touch with Rochester Electronics about getting some CA3080AE ICs (8 pin DIP). I called Intersil about th ... |
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| Topic: Green Omeg pots |
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| Dave Kendall Replies: 23 Views: 13990 |
Posted: Sat Nov 30, 2013 5:31 pm Subject:
Green Omeg pots
Forum: DIY Hardware and Software |
| The question is do I try to replace the pots piecemeal, or just start again
The panel cut-out holes for alphas, if using, are smaller than for OMEG ECOs, so they wouldn't be a drop-in replacement. ... |
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| Topic: Green Omeg pots |
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| Dave Kendall Replies: 23 Views: 13990 |
Posted: Sat Nov 30, 2013 8:28 am Subject:
Green Omeg pots
Forum: DIY Hardware and Software |
| I agree with all the above. I had some go bad quite quickly. Uing push-on knobs, or mechanical stress down the shaft into the pot seems to wreck them quite easily.
Alphas however, work fine and fee ... |
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| Topic: Sine Subosc |
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| Dave Kendall Replies: 18 Views: 8359 |
Posted: Sat Oct 19, 2013 1:21 pm Subject:
Sine Subosc
Forum: DIY Hardware and Software |
| FWIW - on the OG3 schematic posted above, R11 doesn't actually need to be 49.9K - just use two 100K resistors in parallel (= 50K). Similarly, use 300K for R10 instead of 301K- it's a much more commo ... | |
| Topic: Simple CMOS clock generator and divider |
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| Dave Kendall Replies: 8 Views: 7063 |
Posted: Sun Jul 21, 2013 2:42 am Subject:
Simple CMOS clock generator and divider
Forum: DIY Hardware and Software |
| Hi.
You might want to consider adding input protection to the 4024. It could be damaged with greater than 9V inputs from, say a modular. Maybe consider an op-amp based comparator, which will squar ... |
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| Topic: Voltage controlled counter or 1-to-8-multiplexer? |
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| Dave Kendall Replies: 34 Views: 19854 |
Posted: Thu Jun 06, 2013 5:24 am Subject:
Voltage controlled counter or 1-to-8-multiplexer?
Forum: DIY Hardware and Software » Developers' Corner |
| There's also the 4067 16-channel mux/demux chip.
cheers, Dave |
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| Topic: 3.5 Jack Plug/Socket woes |
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| Dave Kendall Replies: 5 Views: 3755 |
Posted: Sat May 18, 2013 11:33 pm Subject:
3.5 Jack Plug/Socket woes
Forum: DIY Hardware and Software |
| Hi Andy.
There is a difference in types of socket, as well as jack. Several years back I did a bulk buy for me and a friend, of Cliff (doepfer-style) sockets. At the time there were two models; the ... |
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| Topic: Need a saw to squarewave convertor |
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| Dave Kendall Replies: 2 Views: 2419 |
Posted: Wed May 08, 2013 9:03 am Subject:
Need a saw to squarewave convertor
Forum: DIY Hardware and Software |
| ^ what buzby said.
Quite a few VCO designs use a comparator to derive a pulse/square from a TRI or SAW wave - you may find a building block ready to go in online schems for these. cheers, Dave |
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| Topic: ondes martenot |
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| Dave Kendall Replies: 240 Views: 330921 |
Posted: Wed Apr 24, 2013 4:04 am Subject:
ondes martenot
Forum: DIY Hardware and Software |
| @axg20202
Jumpered. cheers, Dave |
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| Topic: ondes martenot |
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| Dave Kendall Replies: 240 Views: 330921 |
Posted: Tue Apr 23, 2013 2:48 pm Subject:
ondes martenot
Forum: DIY Hardware and Software |
| axg20202 of course, go ahead - it's a pretty standard circuit. You could add another 47pF cap in parallel with the 200K, and the 1k can be a 330 ohm resistor to bring it more in line with modern prac ... | |
| Page 1 of 17 [421 Posts] | Goto page: 1, 2, 3, ..., 15, 16, 17 Next |
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