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aerogramma
Joined: Feb 27, 2008 Posts: 156 Location: Roma, Italy - London, UK
Audio files: 13
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Posted: Sat Jan 26, 2019 9:38 am Post subject:
Help for a sensor to CV interface |
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Hello there,
I need help building a simple interface that would bridge between my sensors and my modular gear.
I use to have a DIY box that would let me use a Sharp distance sensor to control an analog filter.
I don't have that box anymore and I cannot replicate it. I remember that it was quite easy, just a handful of components.
Can anyone help?
here's the sensor for reference
https://www.sparkfun.com/datasheets/Sensors/Infrared/gp2y0a02yk_e.pdf
many thanks in advance |
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Grumble
Joined: Nov 23, 2015 Posts: 1294 Location: Netherlands
Audio files: 30
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Posted: Thu Jan 31, 2019 2:34 pm Post subject:
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I don’t know this sensor, but maybe you could use a fonitronik-attenuverter-chicklet (google this) _________________ my synth |
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wackelpeter
Joined: May 05, 2013 Posts: 461 Location: germany
Audio files: 10
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Posted: Fri Feb 01, 2019 2:00 am Post subject:
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Looks like this could be a fun circuit (well application note already states "amusement Equipment" )
From what i see you would need only a 5V DC supply for this sensor, then a supply of 12 or 15V DC or even less (from which you can extract the 5V via 7805) and a single supply opamp like LM358 as a Buffer and gain stage because the max voltage seems to be roughly 2V and you might want to boost it up a bit... Maybe you can add some glide circuit within with a cap, to get a variable smooth Response via Potentiometer. Another pot to adjust the Output ovltage level to your needs would also be beneficary i think.
Two of those attached to two VCO's or a VCO and VCA could give you some Theremin-style performance…
Edit: i think i got the characteristics wrong… max Output seems to be 5V+/- 0,3V when operated at 5V supply… but nevertheless some boosting of the Output and the glide function seem to be useful _________________ https://soundcloud.com/bastian-j |
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Grumble
Joined: Nov 23, 2015 Posts: 1294 Location: Netherlands
Audio files: 30
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wackelpeter
Joined: May 05, 2013 Posts: 461 Location: germany
Audio files: 10
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Posted: Fri Feb 01, 2019 3:01 am Post subject:
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oops totally missed the graphics at the end of the app note…
yes, you're correct… but i think that an range of 20cm to 150 cm will make it a bit odd to tame it's behaviour and Output... Maybe some simple LDR driven circuit will give better Control over range and Dynamics... _________________ https://soundcloud.com/bastian-j |
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PHOBoS
Joined: Jan 14, 2010 Posts: 5591 Location: Moon Base
Audio files: 705
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Posted: Fri Feb 01, 2019 8:20 am Post subject:
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speaking of sensors and LDRs here's a circuit I designed a while ago.
I thought I'd posted it before but can't find it right now.
(some more photos can be found here)
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_________________ "My perf, it's full of holes!"
http://phobos.000space.com/
SoundCloud BandCamp MixCloud Stickney Synthyards Captain Collider Twitch YouTube |
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Grumble
Joined: Nov 23, 2015 Posts: 1294 Location: Netherlands
Audio files: 30
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Posted: Fri Feb 01, 2019 8:45 am Post subject:
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wackelpeter wrote: | but i think that an range of 20cm to 150 cm will make it a bit odd to tame it's behaviour and Output. |
There is also a 10-80cm type sensor _________________ my synth |
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