Help with Miditron Schematic for a Ultrasonic Transducer


Anonymous

Anonymous
Jan 16, 2008 at 9:05am

The guy at the electronics shot set me up with this. Said it would sensor motion like when someone walks past but I have my doubts. When hooking it up to the miditron I have only be able to get it to send a midi message (note on/off) as a digital in by touching it, it is super sensitive but that is all. It doesn’t sensor movement.

Any schematic or reccomedations would helpful, web site or stuff.

Thanks in Advance

#35394
Jan 16, 2008 at 8:29pm

Quote: Tom Hall wrote on Wed, 16 January 2008 01:05
—————————————————-
> The guy at the electronics shot set me up with this. Said it would sensor motion like when someone walks past but I have my doubts. When hooking it up to the miditron I have only be able to get it to send a midi message (note on/off) as a digital in by touching it, it is super sensitive but that is all. It doesn’t sensor movement.
>
> Any schematic or reccomedations would helpful, web site or stuff.
>
> Thanks in Advance
>
>
>
—————————————————-

It’s hard to know what to do with your device without a datasheet or a part number or something. I have had fine results sensing range with Sharp Infrared Range Sensors, like this one:

http://www.acroname.com/robotics/parts/R144-GP2Y0A02YK.html

cheers,

mz

#120561
Jan 16, 2008 at 9:05pm

This isn’t an ultrasonic, it’s infrared. Red wire goes to +5v, black
to gnd, yellow (or whatever the 3rd color is) to terminal 1. Use a
multimeter to check that you’re getting outputs in the 0-5v range.
Send me a screen shot of your programmer setup (offlist) if it still
doesn’t work.

Eric

At 12:29 PM -0800 1/16/08, mzed wrote:
>Quote: Tom Hall wrote on Wed, 16 January 2008 01:05
>—————————————————-
>> The guy at the electronics shot set me up with this. Said it would
>>sensor motion like when someone walks past but I have my doubts.
>>When hooking it up to the miditron I have only be able to get it to
>>send a midi message (note on/off) as a digital in by touching it,
>>it is super sensitive but that is all. It doesn’t sensor movement.
>>
>> Any schematic or reccomedations would helpful, web site or stuff.
>>
>> Thanks in Advance
>>
>>
>>
>—————————————————-
>
>It’s hard to know what to do with your device without a datasheet or
>a part number or something. I have had fine results sensing range
>with Sharp Infrared Range Sensors, like this one:
>
>http://www.acroname.com/robotics/parts/R144-GP2Y0A02YK.html
>
>cheers,
>
>mz
>
>
>
>–
>|| michael f. zbyszynski — molecular gastronimist
>|| http://www.cnmat.berkeley.edu/
>|| http://www.mikezed.com/
>
>
>

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#120562

Anonymous

Anonymous
Jan 17, 2008 at 12:23am

Are you sure it infrared?

It says Ultrasonic Transducer on the packaging

#120563

Anonymous

Anonymous
Jan 17, 2008 at 12:43am

there’s a data sheet in the image attached that came with it.

#120564

Anonymous

Anonymous
Jan 17, 2008 at 2:33am

check the attached image to see the circuit

possibly the 5v power supply from the miditron is not enough yeah?!

any help is appreciated

[img]index.php?t=getfile&id=1107&private=0[/img]

#120565
Jan 17, 2008 at 2:58am

What’s the pot for? I thought the ultrasonic sensors just sensed motion, and not distance? Is it for sensitivity? Range?

#120566

Anonymous

Anonymous
Jan 17, 2008 at 3:02am

the pots for sensitivity.

I can’t get the ultraconic to sense motion, it only triggers when I physically touch it.

can you suggest a better schematic? do you think the miditorn 5v supply is insufficient?

#120567
Jan 18, 2008 at 1:05am

Quote: Tom Hall wrote on Wed, 16 January 2008 19:02
—————————————————-
> the pots for sensitivity.
>
> I can’t get the ultraconic to sense motion, it only triggers when I physically touch it.
>
> can you suggest a better schematic? do you think the miditorn 5v supply is insufficient?
—————————————————-

As I said before, I think you’d be better of with a different sensor. This “transducer” is basically a speaker/microphone for ultrasound. Does not generate the waveform on it’s own, and won’t spit back a nice 0-5v signal proportional to distance. Here’s one random project I found on google that uses a similar transducer:

http://instruct1.cit.cornell.edu/Courses/ee476/FinalProjects/s2006/cc425/Paul_Jimmy/index.htm

mz

#120568
Jan 18, 2008 at 10:08am

Tom Hall schrieb:
> I can’t get the ultraconic to sense motion, it only triggers when I
> physically touch it.

Do you have any electronics around it? Usually ultrasonic distance
sensors work like that: they spit out an ultrasonic sound or click, then
they listen to the reflection. The time between the output and the
received audio gives you the distance to the reflecting object.
If your sensor is buzzing, you have the electronics, if it isn’t you
don’t. Then its just the piezo.
Problem with ultrasound is, that normal ADA converters are not dealing
with it…

Stefan


Stefan Tiedje————x——-
–_____———–|————–
–(_|_ —-|—–|—–()——-
– _|_)—-|—–()————–
———-()——–www.ccmix.com

#120569
Jan 19, 2008 at 10:11pm

I’ve used this sensor through an aruino.

http://www.parallax.com/Store/Microcontrollers/BASICStampModules/tabid/134/List/1/ProductID/83/Default.aspx?txtSearch=motion+sensor&SortField=ProductName%2cProductName

I never have to touch it, and it’s fairly sensitive. To control sensitivity, I’d have to write arduino code and use an analog input’s signal with a pot on that (or do it in the circuit, which i don’t know how). This sensor outputs only on or off, moving or not.

This sensor,

http://makingthings.com/products/ACC-IR-DIST-001

which worked great in max through a make controller (but should work with any 5 volt controller). It outputs distance data and is pretty accurate from about 6 inches to a couple feet. It would make a nice theremin style controller.

radio shack stores usually have both items too.

they’re fairly cheap, they might be an option.

#120570

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