IR is electromagnetic radiation with longer wavelengths than those of visible light at 0.74 micrometres (µm) to 300 µm, which is extends the nominal red edge of the visible spectrum.

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38 kHz signa arduino demodulation

I need to demodulate signa with frequency 38 kHz coming from remote controller without IR receiver,I need demodulate it and as a result get information from it. Is there any examples of similiar task. ...
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24 views

Nvidia 3D Vision IR Emitter to USB

I'm trying to get information on how to implement a 3D Vision module I recovered from my laptop and implement it as an USB plug for my desktop computer. I have a 144hz screen and a 3D vision enabled ...
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2answers
48 views

Non-line-of-sight distance approximation between trasmitter and receiver

I have one stationary object in a 2d plane (no z-axis). Let's say this stationary sphere is in the middle of a rectangular plane. I have another object in the same rectangular plane that is in motion ...
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22 views

Use remote controller as keyboard matrix Arduino

I need to connect remote contoller directly to arduino without using IR channel, so just like a plain matrix keyboard. I guess that it is possible just connect remote lines and row to arduino directly ...
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1answer
42 views

IR sensor is not working

I am trying to make a IR sensor but somehow its not working.Below is my circuit diagram when i bring my hand near the sensor, the led connected to pin1 of lm358N does not glow. I also checked the ...
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23 views

IR transmitter connected to 3.5 phone audio jack, 1 LED or two?

I'm building this device, but the instructions say to use 2 LED's, and due to my lack of electronics knowledge, I am wondering how necessary it is to use 2 and not just one. I tested the device with ...
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1answer
165 views

Arduino IR Receiver

I was reading this tutorial http://arduino.cc/en/tutorial/button, and I want to do the same, but with a 2 pin IR receiver LED. The problem is, the LED needs 1-2v max, or it will break. How can I use ...
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1answer
57 views

Simple and Cheap method to detect object proximity in the dark

I am interested in detecting if an object (e.g. small box made of non-conductive material like plastic/acrylic/wood) is placed on top of a surface (e.g., a table), I don't need to identify the object, ...
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1answer
47 views

Timed Infrared or Infrared PWM Signals

We are trying to have a moving IR receiver pickup a specific IR-led for a range of IR-LEDs. The options we're looking at : Send and unique pwm signal from each different led, the moving object ...
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1answer
33 views

How the wiring of IR emitter detector pairs work

Attached is an image from the book I am going through. I don't quite understand the schematic and was hoping someone could explain it to me, including the use of the resistors. Like, does it matter ...
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28 views

occupant sensor/detector for goods vehicles - active during driving

I need to detect and raise an alarm in the goods load area of a consumer goods vehicle if there is human movement detected whilst the vehicle is in motion. To put it simply - our goods vehicles are ...
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58 views

Under water distance measurement

For a laboratory / field test, I'm looking for an easy solution to measure the soil surface elevation. The test runs a flow on a bed. When the erosion takes place the sediment concentration goes high ...
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38 views

Infrared filter on CMOS single package sensor

I am trying to recognize infrared-reflectors with a CMOS module. The ideal would be to use an IR filter to get rid of everything else and only have the trackers (reflectors) on the picture. I found ...
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1answer
52 views

Appropriate use of the word “modulated”

I don't use the word "modulated" very much and I would like to make sure I use it correctly. The TSSP77038 IR receiver module is a device that detects infrared light turning on and off quickly at a ...
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1answer
44 views

Help using an attiny85 and ir receiver

I'm trying to use 2 attiny85, one with an IR transmitter and one with an IR receiver (2 pins). I can't figure out how to use the attiny85 with the receiver. Help would be appreciated! If it is not ...
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24 views

Phone audio jack IR transmitter and receiver

Note: I'm quite new to electronics so I apologize for any dumb questions. Hi, I'm trying to make an infrared transciever module for my smartphone using it's audio jack. I'd like to be able to record ...
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1answer
33 views

How to adjust or obtain different IR Transmitter's distances?

I would like to recreate a infrared concept used by in the vacuum cleaning robot's charging station. I would like to use 3 infrared transmitters all in same wave length and transmit a synchronized ...
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33 views

PIR Sensor's Pin Configuration

I just bought a PIR Sensor but I can't get any help about it's pins. The sensor's model number is RPY96. I tried to use it as the three pin sensor, but it isn't working. The pin configuration which I ...
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35 views

One Transmitter for multiple recievers

I need to track case pans at work, I would like to do so by using cheap 433Mhz receivers. My problem is we have up to six hundred case pans in the building at any given time. Will I be able to use one ...
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2answers
69 views

What are some LED technology for one dimensional coherent light emission?

I need to emit a unidirectional infrared pattern, i.e. the emission cone should have small angle on one dimension and large angle on the other one (basically laser-like in one dimension and normal ...
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1answer
69 views

Protocol and design resource of 3.5mm stereo jack remote control

I've seen a few audio visual equipments that can be controlled with both wired (3.5mm stereo jack) and wireless (infrared). On the equipments, there are IR receiver port and also a port that resemble ...
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43 views

IR temperature Sensor reading ambient temperature in a room

I bought a product that has a IR temperature sensor and I want to receive a "good quality" ambient reading of a room. I have an idea how to use the IR sensor for the ambient, even though it would be ...
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1answer
61 views

IR transmitter connected to phone audio jack

I took an IR LED transmitter, and soldered it to a mono audio jack (positive pin to the left channel, negative to mass). Now, the LED is quite small, and I'm pretty sure that the phone audio output ...
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1answer
86 views

Load resistor value for phototransistor switch

According to this application note from Fairchild (btw, I find Fairchild's application notes to be of immense value - thanks to all who have taken the time to write one), the load resistor value for a ...
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1answer
53 views

Using IR Emitter and detector incorrectly

So I bought this from radioshack and tried to set it up following this tutorial. The problem is, the red LED lights up and when i try to interfere with the connection, nothing happens. When I remove ...
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2answers
121 views

Increasing the range of an IR based detector

I am working on a IR based object detector. I understand the basics of how it functions, i.e., 38kHz pulse through an IR LED and read the output pin of the IR sensor. The problem is that the range ...
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2answers
117 views

Electronic pendulum

I am building an electronic pendulum. I want to use a 2N2222 to power the drive coil when the pendulum bob interrupts an IR beam. The pendulum bob is magnetic and moves in reaction to the drive coil. ...
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1answer
93 views

Using infrared temperature sensor to measure water surface temperature

Not sure I choose the right place to ask the question, but... Can I use infrared temperature sensor (such as TS118-3) to measure water surface temperature? I'm afraid some effects as reflection of ...
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1answer
119 views

How can I control an IR jammer or other device remotely?

I am going to buy an IR jammer kit and hide it somewhere near the tv. I need a way to remotly activate the jammer. What are my options? I can also purchase the ninja stealth remote but I need some ...
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1answer
71 views

Phototransistor bandwidth issue

I'm trying to sense IR wave with a phototransistor circuit. The circuit operates well under DC operations (I mean 3V or 0V through inputs). However, if a square wave is supplied from UART input, ...
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1answer
68 views

IR Led & Phototransistor pair bandwidth issue

I'm trying to sense IR wave with a phototransistor circuit. The circuit operates well under DC operations (I mean 3.3V through inputs). However, if a square wave is supplied from UART input, after ...
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1answer
92 views

Driving an infrared LED from a coin cell

I am designing a remote-control type IR transmitter that will be powered by a coin cell battery (i.e. CR2032) and commanded by a microcontroller. The LED is pulsed at around 40kHz. How can I ensure ...
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4answers
113 views

Unknown voltage in IR pulse sensor circuit

I've build a simple circuit based on the sketch from here: http://makezine.com/projects/ir-pulse-sensor/ simulate this circuit – Schematic created using CircuitLab However, after ...
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2answers
68 views

compensate for missing leds

I bought a small DIY infrared emitter today, but two of the LED's are missing. The data sheet for the LED's is also missing. The schematic is like this (a bit bigger): Power source is 12V. There ...
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73 views

Problems with Infrared circuit on a PCB - Is it the board or schematic?

I am using the toner transfer method to apply my circuit for 6 sets of infrared emitters and collectors connected to an RJ15 cable on a PCB for use with a Raspberry Pi B+ board (connected via IDE ...
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1answer
135 views

How to drive external LEDs using Digilent Genesys (Virtex-5) FPGA? How to use pressure or IR sensor input?

I'm in a Reconfigurable Logic course. Our final project is to program a Digilent Genesys Virtex-5 FPGA board to simulate a traffic light controller for a 2-lane intersection, with outputs being the ...
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1answer
81 views

How to chose right lens for concentrating IR signal?

I am looking for the right acrylic lens. Since will be buying at least 1000 pieces I don't want to make any mistake. I want to concentrate the signal from IR LED in a 1cm diameter tube at one point ...
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4answers
108 views

Is there any material from which lenses are made which are fine with IR signal? I mean really cheap ones

I am making a prototype where I need to direct the flow of the IR signal at some specific point. I found out that glass material doesn't work properly in combination with IR. Is there any cheap lens ...
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1answer
59 views

How can I implement a proportional error control scheme with op amps?

So I have an IR distance sensor that I would like to use to keep two wheels (with DC motors) travelling parallel to the wall beside them. I have these proportional error control formulae to keep the ...
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1answer
57 views

Line-of-Sight method of simple code transmitting for outdoors

I'm trying to determine the best way to do this. Basically I'm trying to design a system that would transmit a signal containing a simple code to allow the receiver to identify the source device. It ...
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53 views

Good narrow beam, modulated IR sensor suggestions

I am looking for a narrow beam, modulated, digital IR sensor that can detect a distance of at least 10 cm (longer is better). I've talked to mouser and pololu and they were unable to leave me in the ...
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243 views

Datasheet for Keyes IR Transmitter (KY-005) wanted

Can someone help me find the datasheet for the Keyes IR Transmitter (KY-005)? I know how the pins work, I just need to figure out its voltage drop and how much current should go through it. Thanks! ...
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2answers
115 views

Which SMD component as IR barrier?

I have a PCB design that uses an infrared proximity detector in the form of an IR LED and an IR transistor placed with about 10 mm spacing between them. Now the problem has arisen that I need some ...
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2answers
794 views

Calculate mosfet gate resistor?

I got this schematic : In the image you see; I'm driving two infrared leds at 40 Ma each one with a FDN327N Mosfet. Attached at D8 there is one of Teensy 3.1 digital output that has HIGH voltage ...
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1answer
63 views

Photointerrupter issue

I have circuit with photointerrupter GP1S092HCPIF. The documentation is rather weak and D-shape pin strange but I need a small SMD type. I hopefully identified pins correctly and when soldered on ...
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1answer
71 views

Is it possible to limit IR led so sensor detects it only if you aim at it?

I will have IR led and IR sensor as in TV. As you know, even if you don't point at the TV you are able to change channels. My question is, is it possible to limit it somehow (maybe by putting the ...
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0answers
36 views

Sony RMT-CE75A protocol

I am planning to use an old Sony remote I found around my house for a remote control project. It has the remote number RMT-CE75A and it says Radio Cassette. I am trying to figure out the protocol ...
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40 views

Custom IR LED controller for two independent strips

Is there a way to modify a controller with IR remote to control two separate led strips independently. Basically you have two strips, one controller, one remote and you can change the color|turn ...
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39 views

Does any module exist with two separate PIR sensors?

I would like to use two separate sensors to detect a range of situations. subject from the right, subject from the left, from the middle (dual trigger), ignore one side, determine length of ...
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3answers
110 views

What is the cheapest sensor that can detect a wall regardless of color?

I'm making a small toy that will use the sensor reading to avoid colliding with a wall. Before buying the sensors I want to confirm that can they detect green, pink, or white colored walls.