MirlitronOne's channel
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MirlitronOne
liked
3 months ago
Jay Stansfield - Contact - live at the Merz Barn
Jay Stansfield playing "Contact" live at Kurt Schwitters' Merzbarn in the Lake District, September 2011
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MirlitronOne
commented
11 months ago
MK107 sequencer
How to turn a cheap Velleman LED kit into a simple eight-note analogue voltage sequencer for a synthesizer, WSG etc. The whole thing could be built...
Please read previous answer, and listen carefully to the video.
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MirlitronOne
commented
11 months ago
MK107 sequencer
How to turn a cheap Velleman LED kit into a simple eight-note analogue voltage sequencer for a synthesizer, WSG etc. The whole thing could be built...
I don't have time. If somebody else who understands the circuit would like to do so, I give them my blessing. Meanwhile, if you teach yourself enough electronics to be able to do this yourself, you will find it all worthwhile.
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MirlitronOne
commented
1 year ago
MK107 sequencer
How to turn a cheap Velleman LED kit into a simple eight-note analogue voltage sequencer for a synthesizer, WSG etc. The whole thing could be built...
Great, let's see it when it's done! That'll be a nice machine when it's complete.
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MirlitronOne
commented
1 year ago
MK107 sequencer
How to turn a cheap Velleman LED kit into a simple eight-note analogue voltage sequencer for a synthesizer, WSG etc. The whole thing could be built...
Yes, the OA91 is ideal.
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MirlitronOne
commented
1 year ago
MK107 sequencer
How to turn a cheap Velleman LED kit into a simple eight-note analogue voltage sequencer for a synthesizer, WSG etc. The whole thing could be built...
Thanks for the information. I have certainly had problems using an external clock for this gadget, and yes, a transistor buffer stage helps a lot.
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MirlitronOne
commented
1 year ago
MK107 sequencer
How to turn a cheap Velleman LED kit into a simple eight-note analogue voltage sequencer for a synthesizer, WSG etc. The whole thing could be built...
No, you cannot easily switch off notes with this simple device, since you cannot program it to produce silence, nor can you easily block the trigger pulse. Normally, it would just produce either the lowest or highest note if you reduced the output to zero volts.
One possible simple workaround wo...
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MirlitronOne
commented
1 year ago
MK107 sequencer
How to turn a cheap Velleman LED kit into a simple eight-note analogue voltage sequencer for a synthesizer, WSG etc. The whole thing could be built...
Glad to hear it! As long as the output pot has about 10x higher value than the individual level pots (or more), all should be fine. Have fun!
Another cheapy Velleman project is currently under development that should interest the synth community...
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MirlitronOne
commented
1 year ago
MK107 sequencer
How to turn a cheap Velleman LED kit into a simple eight-note analogue voltage sequencer for a synthesizer, WSG etc. The whole thing could be built...
No time to maintain websites! The schematic comes with the kit, although there are various sites that publish the Velleman schematics - they don't keep them secret. The building notes are the video, although the 'Baby 10' sequencer article (use Google) will help too.
I'm working on another Velle...
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MirlitronOne
commented
1 year ago
MK107 sequencer
How to turn a cheap Velleman LED kit into a simple eight-note analogue voltage sequencer for a synthesizer, WSG etc. The whole thing could be built...
Thank you most kindly! My most recent mod is to replace the 555 timing capacitor with one 5x bigger to allow slower sequences. Enjoy.
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About MirlitronOne's channel
MK107 sequencer
How to turn a cheap Velleman LED kit into a simple eight-note analogue voltage sequencer for a synthesizer, WSG etc. The whole thing could be built...
9,018 views
MirlitronOne said:
Why not? For portability. Convenience. And to avoid encouraging some of the visitors here to blow it up or to electrocute themselves.
MK107 sequencer
How to turn a cheap Velleman LED kit into a simple eight-note analogue voltage sequencer for a synthesizer, WSG etc. The whole thing could be built...
9,018 views
MirlitronOne said:
You wouldn't want the rate to go down to 0 bpm though, or all the action will be in the last few degrees of the pot. 60 - 280 is more reasonable.
Sorry, I don't have a reference for the Bongotnik circuit. All I can tell you is that it was based on "The Audio Artist Sound Effects Machine" by Jame...
MK107 sequencer
How to turn a cheap Velleman LED kit into a simple eight-note analogue voltage sequencer for a synthesizer, WSG etc. The whole thing could be built...
9,018 views
MirlitronOne said:
Granoj1's comment was copied to me and didn't seem like spam, so here goes: the components that determine the clock rate are C3 (the 1 uF capacitor) and the variable resistor. You can limit the lowest and highest rates with resistors either side of it. R10 already limits the highest rate in the o...
MK107 sequencer
How to turn a cheap Velleman LED kit into a simple eight-note analogue voltage sequencer for a synthesizer, WSG etc. The whole thing could be built...
9,018 views
MirlitronOne said:
No - the 4015 chip has no reset line.
MK107 sequencer
How to turn a cheap Velleman LED kit into a simple eight-note analogue voltage sequencer for a synthesizer, WSG etc. The whole thing could be built...
9,018 views
MirlitronOne said:
No, I'm secretly MirlitronOne. Ooops.
MK107 sequencer
How to turn a cheap Velleman LED kit into a simple eight-note analogue voltage sequencer for a synthesizer, WSG etc. The whole thing could be built...
9,018 views
MirlitronOne said:
Yep, that's all you need. The only addition to mine was a switch and limiting resistors to ensure that the output does not exceed any input limits on the circuitry to which it is attached. Normally, this won't be a problem, especially if you are careful not to turn the output (range) pot higher t...
MK107 sequencer
How to turn a cheap Velleman LED kit into a simple eight-note analogue voltage sequencer for a synthesizer, WSG etc. The whole thing could be built...
9,018 views
MirlitronOne said:
Yep, shouldn't be any problem with that. Which MFOS synth are you building?
MK107 sequencer
How to turn a cheap Velleman LED kit into a simple eight-note analogue voltage sequencer for a synthesizer, WSG etc. The whole thing could be built...
9,018 views
MirlitronOne said:
It's a sequencer. It outputs a repeating sequence of discrete voltage levels that can be used to drive a voltage-controlled oscillator which then generates the tone.
You need a VCO for it to drive. There are loads of simple designs out on the web - using CMOS ICs or a 555 timer, for example. It ...
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