| Author |
[FYI] Infrared Proximity Sensor CV generator |
| av500 |
was it quick? yes! was it dirty? yes! is it fun? I think so!
(excuse the bad sound quality, I did not have the phone cam rig with me)
Using a SHARP GP2-0430 (4cm-30cm) proximity sensor, signal is ~50Hz lowpass filtered, attenuverted and 3x gain boosted, yielding a +/-6V range. left jack is unused for now, I might make it an input that is added to the sensor CV
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| synchromesh |
Very cool! How about a module that demodulates the signal from IR remote control units, then you could play your modular from across the room.  |
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| av500 |
| synchromesh wrote: | | Very cool! How about a module that demodulates the signal from IR remote control units, then you could play your modular from across the room. |
I'm on it!  |
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| DMR |
| Sort of a Roland D-Beam module? |
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| av500 |
| DMR wrote: | | Sort of a Roland D-Beam module? |
unleashing my lawyers as we speak!  |
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| Eloc |
| Gotta get me one of those dual post-it note modules... |
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| av500 |
| Eloc wrote: | | Gotta get me one of those dual post-it note modules... |
you have to understand, the world simply isn't ready for this one yet... |
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| Jarno |
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| av500 |
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| fitzgreyve |
Mad - got to build one (just ordered the sensor).
Now - what can we create with the similar "optical dust sensor" ?? 
What's the module to the right of the sensor ? |
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| av500 |
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| Paul Perry |
| av500 wrote: | | DMR wrote: | | Sort of a Roland D-Beam module? |
unleashing my lawyers as we speak! |
Funny you should say that, Roland's US lawyers sent me a couple of kilograms of cease & desist when I was selling my IR controlled oscillator. They gave up when I showed them the 1970s prior art  
(mine simply detected the amplitude of a reflected modulated infrared.) |
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| av500 |
| Paul Perry wrote: | | av500 wrote: | | DMR wrote: | | Sort of a Roland D-Beam module? |
unleashing my lawyers as we speak! |
Funny you should say that, Roland's US lawyers sent me a couple of kilograms of cease & desist when I was selling my IR controlled oscillator. They gave up when I showed them the 1970s prior art
(mine simply detected the amplitude of a reflected modulated infrared.) |
oh, wow
any reference to that IR controlled oscillator? |
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| Jarno |
| Paul Perry wrote: | | av500 wrote: | | DMR wrote: | | Sort of a Roland D-Beam module? |
unleashing my lawyers as we speak! |
Funny you should say that, Roland's US lawyers sent me a couple of kilograms of cease & desist when I was selling my IR controlled oscillator. They gave up when I showed them the 1970s prior art
(mine simply detected the amplitude of a reflected modulated infrared.) |
LOL! |
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| av500 |
Since I got asked for schematics in PM, here's what's inside:
- SHARP GP2-0430 (4cm-30cm) proximity sensor:
in order to fit in 4hp, I cut away the little PCB tab that holds the connector and soldered the severed traces with enamel wire. then I added a 100uF and a 100nF cap right on the power supply pin on the sensor.
- the sensor output goes through an RC lowpass to get rid of the spikes that result from the periodic sensing operation, I forgot what RC values I used but something roughly around 50Hz cutoff. If you can move your hand faster, increase this 
- dual opamp configured as: attenuverter (unity gain) followed by a 3x gain inverting opamp.
thats's basically it.... |
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| av500 |
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| sempervirent |
This is neat (I immediately thought of the D-Beam too, haha).
Any photos of the back? |
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| av500 |
pics:
  
(I had the OPA2134 on my desk, TL072 will do fine...) |
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| Jarno |
Art!  |
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| dot matrix madness |
Thanks for the details!
The OPA2134 makes up for all the other "dirty"bits |
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| av500 |
| dot matrix madness wrote: | Thanks for the details!
The OPA2134 makes up for all the other "dirty"bits |
just make sure to align the two capacitors exactly 89.3 degrees (or whatever that's is in imperial) as shown above! |
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| dot matrix madness |
| Judging from the data sheet I assume that the sensor is powered by +5V ? |
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| av500 |
| dot matrix madness wrote: | | Judging from the data sheet I assume that the sensor is powered by +5V ? |
indeed. 5 is the new 12 |
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| oberkorn |
av500 do you have a diagram/schematic of whats going on there for a n00b like me?
I got a proximity sensor of the same type from a friend so I might try to make a similar module  |
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| av500 |
| oberkorn wrote: | av500 do you have a diagram/schematic of whats going on there for a n00b like me?
I got a proximity sensor of the same type from a friend so I might try to make a similar module |
something like this:
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