Description: Infrared IR Matched Assembly PhotoEmitter / PhotoDetector Pair, T-1 Size ( Purchase is for 8 of the Units Shown ) End the hassle of trying to find "Matched Pairs" of Detectors and Emitters that operate at the same wavelength. These pairs were designed with that in mind for maximum efficiency and reliability. They were made for the automobile industry so reliability was an important requirement. Compare these to others you find on eBay, then decide which ones you feel you can trust in your own project. Please refer to the additional photos I've provided above. They show a couple simple circuits you may be able to apply or modify to suit the needs of your application. 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. If you prefer, you can unsolder the Emitter and Detector from each other and place them across from one another to get greater detection range. 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 Sorry, No Local Pick-Ups
Price: 4.99 USD
Location: Burton, Michigan
End Time: 2025-02-03T18:24:45.000Z
Shipping Cost: 3.66 USD
Product Images
Item Specifics
Restocking Fee: No
Return shipping will be paid by: Seller
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money back or replacement (buyer's choice)
MPN: Diode Light Beam
Brand: Unbranded/Generic
Model: unknown
Country/Region of Manufacture: Unknown
Bundle Listing: Yes
Type: Individual Item
Wavelength: Infrared
LED Size: 3 mm
LED Color: IR
Modified Item: No
Non-Domestic Product: No
Custom Bundle: No