Re: [CAD_CAM_EDM_DRO] IR proximity detector

Thats about it; Two relatively short pieces from the LED and the photo
transistor, or other opto detection device, to the, "upper" arms of the, "Y",
connector, and a third to wherever you want to detect something. If I recall,
the range is about 6-8 inches max, but I wouldn't expect great resolution at
that distance.

On another use, if you have a rotating shaft, and paint it white on one side,
and flat black on the other, you could send the output to a counter for a simple
RPM DRO. Depending on what components you use, you might want to feed it
through a level detector op amp as an input to the counter, just to clean up the
signal a bit.

Bill

On Wed Mar 31 10:53:40 2004 Andy Wander wrote:

>So if I understand it correctly, it is 2 pieces of fiber optic cable, one
>from the LED, and one to the detector, of which the other end of both is
>"pointing" at the subject? So that it works via reflection?
>
>Or have I missed the point entirely?
>
>Andy Wander
>Verrex Corporation
>
>
> -----Original Message-----
>From: Bill Vance [mailto:ccq@...]
>Sent: Wednesday, March 31, 2004 1:38 PM
>To: CAD_CAM_EDM_DRO@yahoogroups.com
>Subject: Re: [CAD_CAM_EDM_DRO] IR proximity detector
>
>A google search for fiber-optic connectors would probably turn up something.
>
>Bill
>
>On Wed Mar 31 09:02:24 2004 Andy Wander wrote:
>
>> I understand everything except the "Y" part-is there an optical fiber "y"
>>available? or do you fabricate it?
>>
>>ANdy
>>
>>-----Original Message-----
>>From: Bill Vance
>>To: CAD_CAM_EDM_DRO@yahoogroups.com
>>Sent: 3/31/2004 11:00 AM
>>Subject: Re: [CAD_CAM_EDM_DRO] IR proximity detector
>>
>>On Tue Mar 30 22:10:52 2004 Trend wrote:
>>
>>>I was thinking about adding an IR proximity detector to my cnc router
>>((or
>>>even an ultrasonic one) (to see how far the vertical axis is away from
>>the
>>>material.. so both transmiter and receiver is next to each other)
>>>Something like:
>>>http://www.acroname.com/robotics/parts/R132-IS471F.html
>>>Just seems like a fun project.
>>>
>>>Anyone know what would be the easiest solution? I need something that
>>would
>>>be easy to wire up.. as I am still getting use to electronics :)
>>>
>>>thanks!-Lee
>>
>>You might try the optical fiber, "Y", connector route. Drill the
>>tinyest,
>>shallow hole you can make in the top of an LED. Insert a piece of viber
>>optic
>>cable into the hole, with a drop of clear glue on it, and hold it till
>>it takes
>>a set. Thats the transmitter side. Do the same with a photo
>>transister; Thats
>>your receiver side. Now whatever length of optical cable you connect to
>>the
>>bottom of the, "Y", can be routed anywhere you like, and used as both
>>transmit
>>and receive, simultaneously. Driving the LED with an astable, or PWM
>>oscillator will give some control over sensitivity. This was originally
>>used as
>>the sensor circuit in an audio object detector, with the detector end of
>>the
>>fiber optic cable mounted on the tip of a blind man's cane.
>>
>>Bill
>
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--
********************************************************************************
* *
RKBA! * Blessings on thee, oh Israel!!! * 4-19!
* *
********************************************************************************

An _EFFECTIVE_ | Insured by | All Matter is vibration. | Let he who hath no
weapon in every | by Colt; | --Max Planck | weapon, sell his
hand = Freedom | Dial | In the beginning was the | garment, and buy a
on every side!! | 1-1911-A1 | Word. --The Holy Bible | sword. --Jesus Christ

********************************************************************************

Constitutional Government is dead! LONG LIVE THE CONSTITUTION!!!!!!

********************************************************************************