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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57 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
53 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
44 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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0answers
20 views

Light triggered ir-transmitter using MC145026P

I'm a beginner with electronics, so please keep that in mind if/when answering :) I have a raspberry pi in my kitchen for playing music. I want to make it play different playlists depending on which ...
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1answer
63 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
63 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
61 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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0answers
55 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
96 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
70 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
83 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
54 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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0answers
17 views

Keeping two wheeled wall following robot straight [migrated]

I have a two-wheeled (two DC motors) robot that needs to follow the wall beside the robot. The issue is that the DC motors spin at different rates (because they are not identical, of course), so the ...
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1answer
55 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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0answers
35 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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0answers
30 views

IC similar to U2538B for IR filtering 46kHz

For an infrared receiver I need to bandpass filter a signal with a carrier of about 46kHz. Normally one would buy an IR receiver with built in signal conditioning, but they don't seem to exsist for ...
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0answers
80 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
94 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
166 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
53 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
47 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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0answers
27 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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0answers
37 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
88 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.
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2answers
237 views

Use 555 for additional 40KHz PWM in Arduino

I need to transmit infra red signals using IR LED from my Arduino device. The IR signals consist of PWM 40 kHz periods and "silence" periods of various length (typical IR remote signals). I know ...
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0answers
36 views

Simple non-ultrasonic rangefinding beacons?

I am looking for a range finding beacon system, where beacon A will tell me how far it is from beacon B, with an operational range at least 7 meters, and preferably omni-directional. It cannot use any ...
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0answers
45 views

IR Emitter seems slow

I have a circuit same as in following question: Why would an IR remote circuit use one resistor/transistor pair for each LED? Except that I am driving the 2N3904 base from a LPC810 (DIP8) and I have ...
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2answers
261 views

Will my 12V power supply ever burn these IR leds blinking at 38kHz even without a resistor?

I'm new to electronics, my background is mostly on the software development side... so go easy on me, as this might be a really stupid question. I just want to be sure what is safe to assume and what ...
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1answer
86 views

Safe line IR laser which will be seen from 15 meters by camera module

What characteristics (wavelength, mW) IR line laser should have to: be seen by camera module from 15 meters outdoor in day-light too safe for eyes line as big as possible thickness of line should ...
-1
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1answer
102 views

Small low-power device-to-device proximity detector

I would like to find or create a small low-power proximity detector to tell a device when another device is near. This would be coupled to a small microcontroller like the AT-tiny 45. It doesn't ...
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1answer
259 views

How to amplify the signal of a TCRT5000 phototransistor

I'm trying to read the IR signal from my Itron C1S Power meter. It has an emitter that lights up for 10 ms every Wh of consumption. This question is based on my prior question: Use a photoresistor ...
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6answers
303 views

Control a lot of IR sensors with Arduino / Build a game board tile

Is it possible to control a lot (let's assume 100) of TCRT5000 IR distance sensors with one Arduino? So just use one or a few pins but not 100? I am relativly new to the Arduino/electronics area and ...
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1answer
73 views

Explanation and usage of LM324

I am trying to make a line follower robot using LM324 as comparator, but I cannot understand the theory or the explanation of this circuit. I also don't know how to calibrate it with the IRs.
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1answer
144 views

High quality IR projector for depth detection

I want to build my own depth sensor like the way Kinect does it, using IR and a Camera but I can't find anywhere where I can get the "IR Camera". I do not need a CMOS board as I will be computing ...
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3answers
350 views

Sending audio over infrared?

I am an undergraduate and new to electronics. I wanted to know if it is possible to send audio over an infrared LED? I plan to use a 555 timer to generate PWM output with carrier at around 44 Khz to ...
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1answer
108 views

Two arduino unit communication

OK plain and simple I'm not sure to use IR or RF. This is short distance up to maybe 10 ft. I have an Arduino Uno that I have all set up here. I press a button and it carries out its code. This is ...
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1answer
67 views

Interesting observation on strange behaviour using motors and IR transceiver

I am working on a robot with with the following specs: Two coin type vibration motors rated at 3V for locomotion Motors triggered using two darlington transistors (sample schematic shown below) ...
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2answers
66 views

Issues related to Bit-banging transceiver modules

I have two Infrared Transceiver modules from TFDU4101-TR3 on two separate boards each interfaced to ATMega164PA microcontroller. To drive these transceivers an endec is needed which I have not used in ...
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2answers
224 views

How to connect IR sensor ( Infrared detector/receiver )?

Would you give me a hand ? I have an IR sensor with 3 pins. It looks like the one in the picture, and I did not find any datasheet for it on the internet. actually, I have 3 questions : 1- I want ...
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3answers
147 views

How can I increase the range of an infrared emitter?

I'm currently using this set of infrared emitters and detectors. It appears that I only get about 10 cm of signal before the detector doesn't pick it up. It's on +5v power with a 10k pull-down ...
0
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1answer
153 views

How much power/intensity IR Diode should have to be seen from 30-50 meters

How much power/intensity IR Diode should have to be seen from 30-50 meters by camera with IR pass filter? Must be a good point in a photo. Should be seen in a day light. Preferably with wide angle. ...
-1
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2answers
177 views

What's the difference between an infra-red and a normal phototransistor?

I was wondering if there is any difference between an infra-red phototransistor and a normal phototransistor. I was also wondering if either of these would be directly compatible with an Arduino? ...
2
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1answer
149 views

Beam Angle vs Viewing Angle

I am looking at the product specs for an IR light and see that it has: Beam Angle: 50 deg Viewing Angle: 25 deg What is the ...
2
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1answer
713 views

Converting Pronto hex codes to raw on/off pulses

I'm really just getting my feet wet when it comes to IR protocols and IR codes in general, so my knowledge and understanding may be a bit shaky here. I am a programmer and am trying to create a tool ...
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2answers
207 views

Transistor Ohms

I've built the circuit in the schematic below to control my TV, the D1 and D2 LEDs are the two mini LEDs from this IR Extender: I've cut it below the female headphone jack and I'm using my ...
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2answers
114 views

Why is IR Transceiver transmitting/receiving rubbish?

I am trying to interface two microcontrollers wirelessly using IR transceivers. The microcontroller I'm using is ATMega164PA running on a 3.3V supply at 8MHz and the transceiver is TFDU4101-TR3. I am ...
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1answer
83 views

Micro Controllers to control Solenoid valves upon receiving signal from PIR Motion Sensor

I am using a PIR Sensor of Sparkfun(Model 8630) to detect human's presence in washroom. If there is no human presence in an interval of 30 minutes, the Solenoid Valve connected to pipe line in the ...
4
votes
2answers
454 views

Robot following you; what's the best way?

I built a human-sized robot that can follow anyone wearing an IR beacon. It works quite well indoors and it's quite precise, but outdoors it is completely blind due to sunlight infrared. I have a ...
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1answer
204 views

Can an IR camera be used in broad daylight?

I am wondering if it is at all possible to have an IR camera that can be faithfully used in broad daylight. I have already seen this question here, but I am looking to understand if a full blown ...