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Details about  4 IR Photo Emitter / Detector LED Units or Free w/ $20 Bidcenter Store Purchase

4 IR Photo Emitter / Detector LED Units or Free w/ $20 Bidcenter Store Purchase
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Item Information

Item condition:
New
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More than 10 available / 59 sold
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Price:
US $2.98
Approximately C $3.27(including shipping)
 
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59 Sold
New Condition
No additional import charges at delivery!
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Shipping:
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Item location:
Burton, Michigan, United States
 
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United States and many other countries | See details
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Includes international tracking
Payments:
International shipping and import charges paid to Pitney Bowes Inc. Learn More- opens in a new window or tab
Returns:
14 day money back or item exchange, buyer pays return shipping See details
Coverage:
eBay item number:
220907079881
Seller assumes all responsibility for this listing.
Last updated on  Dec 22, 2011 16:09:35 EST  View all revisions

Item specifics

Condition:
New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ... Read moreabout the condition
 
* New *
Infrared IR PhotoEmitter / PhotoDetector Pair, T-1 Size
( Purchase is for 4 of the Units Shown )

Please refer to the additional photos I've provided above.
They show a couple simple circuits you can either use or
modify to suit your needs in implementing the application
ideas listed below.


Application ideas:

Make a Tester for your IR Remote Controls
Detect whether Doors are Open or Closed
Detect when windows have been opened.
Detect drawers and cabinets that have been opened.
Detect when a piece of equipment is properly positioned
Detect passing items on an assembly line and increment a counter


I've provided lots of additional information below on this
Photo LED IR Pair, but first I should tell you there are two
ways you can get 10 of these for FREE.

To get 4 Sets of these Totally Free, just use the link below
to visit my eBay store and buy $20 worth of merchandise.
You do need to include a note with your PayPal payment
letting me know you're acting on this free offer. Otherwise,
I won't know to send you this item.

Photo Emitter / Detector Operation:
Obviously this Photo Detector and Photo Emitter are
designed to be compatible with each other. So, you
don't have any worries about compatibility here. That's
something you can't always be sure of when you purchase
a Photo Detector and Photo Emitter separately some
place else.  Many of you will probably unsolder the
Emitter and Detector from each other and place them
across from one another. That should obviously give
you a much greater detection range, one that is probably
measured in feet rather than fractions of an inch.

However, should you decide to use them as they
are with the aid of a reflective surface, that's ok too.
The reflective surface will just have to be in close
proximity to the semiconductor pair. When the IR
Photo Detector is receiving light from the Photo
Emitter, it's resistance changes becoming about
one tenth of it's dark resistance. This makes
detecting the presence of a reflected surface
very easy. It just requires a simple voltage comparator
to do the monitoring. In fact, a 555 timer so wired
to use it's internal comparators would probably
do the job very nicely, and it's output would be
capable of activating a relay, a light, an alarm,
or even a High-Power Solid State Relay.


The optimum distance between the Emitter/Detector
pair and the reflective surface is about 1/4 inch.
However, that distance can be increased by careful
selection of the photo detector series resistor and/or
by setting the comparator trigger point to a lower voltage.

I've included a circuit diagram that shows a sample
detection circuit.

This is a far better way to detect the presence of a
near by moving object than using mechanical switches
that can get out of adjustment or wear out. There is
nothing mechanical to wear out with this technology.

More Info on building a Tester for IR Remote Controls:
You can use the same basic comparator circuit shown
in the 2nd photo; however, you might prefer to have
the Green LED light only when a signal is being received
from the IR Remote Control being tested. In such case,
you will need to connect the Green LED between the
3.3k ohm resistor and the minus supply lead, with the
Green LED anode connected to the 3.3k ohm resistor.

I have tried this basic circuit with a half dozen different
IR remote controls I have, and it detected all of them.
The Data Stream sent by some of the remotes is quite fast
though, so you might have to watch the Green LED closely
on some remotes. Of course, you could easily remedy
that little inconvenience by connecting a 555 Timer
capacitively coupled to the output of the comparator
in Monostable Mode. That way when the 555 timer detects
a pulse at the comparator output, the 555 timer can light
a 2nd LED for whatever length of time you desire (like
perhaps a second or two).

Two great books for the home electronics hobbyist that
will provide you with lots of great "Know How" on how to
do these kind of things (and much more) are Don Lancaster's
"TTL Cookbook" and his "CMOS Cookbook".

Sorry, I don't have any hard specs on this assembly, but I
can tell you that it was intended for use in automotive
applications. So the maximum voltage rating is probably
around 25 volts. The Photo LEDs are T1 size (3 mm Diameter).
The Total width of the Photo LED pair is 12 mm and the total
height including lead length is 17 mm.

Application ideas:

Detecting when the big garage door is open.
Detecting when home windows and  doors have been opened.
Detecting when drawers and cabinets have been opened.
Detecting when a piece of equipment is properly positioned (or is out of position)
Detect passing items on an assembly line and increment a counter

NOTE:
To get combined shipping, you must request a
new invoice from me and use the link provided in
the new invoice to send your PayPal Payment from.
Sorry, I do not provide combined shipping if you
have not followed that procedure.

Please understand that it requires a lot of extra
time and effort to combine shipping after your
payment has been sent because I must then
recalculate the shipping, update the packing slips,
Log into PayPal, issue the shipping refund, and
send the appropriate email notifications. I simply
do not have time to do all that for everyone after
the fact. I'm more than willing to help you get
combined shipping, but I need your cooperation
in that effort as well. Thank you.





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Shipping and handling

Item location: Burton, Michigan, United States
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Domestic handling time
Will usually ship within 1 business day of receiving cleared payment[newWindowTxt].

Return policy

Item must be returned within
Refund will be given as
14 days after the buyer receives it
Money back or item exchange (buyer's choice)
The buyer is responsible for return shipping costs.
Return policy details
Return Policy: Items may be returned for refund or replacement within 14 days of purchase provided they are returned unused and undamaged in the original box or packaging and with all the original manuals and accessories. Shipping fees are not refundable, however, defective items may be returned for replacement and seller will pay shipping charges to send the replacement. If replacement is not possible, a refund will be given. Since shipping damage can also result in a refund being declined, be sure you package the item well when returning it. Use bubble wrap to secure items in boxes and ESD protection for electronic parts sensitive to ESD. To get a Full Refund, buyer also needs to confirm purchase cancelation with eBay before a refund will be given. If buyer does not confirm purchase cancelation with eBay, seller's eBay Final Value Fees will be deducted from the refund given.

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Payment method Preferred/Accepted Buyer protection on eBay
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Make sure your PayPal address on record is up to date. Purchases will be shipped to that address unless instructed otherwise. If making multiple purchases, please request an invoice so that shipping can be combined. We reply promptly to all customer emails, so if you have not gotten a response from us within 24 hours, please make sure your spam blocker, or your ISP's spam filter have not mistakenly blocked our email.
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