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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31 views

How much dc power is needed for 4 infrared leds connected in series [on hold]

Actually, i want to wire 4x1watt IR LEDs but i don't exactly know how much power and which resistor is needed for this circuit?
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3answers
39 views

Infrared Receiver

I am Designing a project to use An IR remote and i am confused about the receiver. I noticed some have two legs such as this And others have 3 legs as seen in this one Can someone tell me the ...
0
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1answer
44 views

Infrared LED binary code

I'm a noob of electricity and circuits, so please keep that in mind. Devices have some IR binary codes to operate a function. For example, binary code of a TV for "volume up" is 0001 0111. What do ...
0
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0answers
56 views

Replacing an IR sensor with buttons

So i have this HI-fi sub-woofer control thing that only has remote control support and i have no remote and I've got no codes for universal remotes. tbh just some switches on the side would be all i ...
1
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1answer
27 views

Understanding IR Protocol Checksum generation

To control my AC with an Arduino, I'm trying to emulate the IR Remote. Not with another IR LED, but directly connected to the IR Receivers Signal wire on the board. Using the Arduino as a Logic ...
-1
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0answers
32 views

IR commands for shuting down television

I looked everywhere . But i could not find it . I did my ir remote control system for samsung smart tv. I am curios on are there any command to shut down television (it does not matter television on ...
0
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1answer
31 views

RS232-TX voltage translator

Would like your help to clear my doubt and confusion for this circuit http://nil.rpc1.org/wordpress/?p=31. I don't get a sense that how possible the RS232-pin3 TX signal is converted and transmitted ...
0
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2answers
50 views

3.6V 38khz 25 IR Led in paralel

I'm working on a proximity detection project to drive up to 25 IR led on 38Khz with 3.6v mcu.I'm planing to make them parallel with 100 ohm resistor (limit their current to 20ma for each led).MCU pwm ...
0
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2answers
136 views

Infrared LED vs halogen light output comparison

I am thinking of using a high power ~50W IR led. I am wondering if LED IR is more efficient than halogen as is the case with visible light LED's? I couldn't find the light output of either IR halogen ...
0
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1answer
25 views

using TSOP4838 in anti-collision line follower

i want to use IR sensors with emitter part ( IR led ) - calibrated with an IC timer to give 38KHZ IR signal - mounted side by side - not face to face like the counter module - to the receiver part ( ...
0
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1answer
69 views

Why Roomba has IR bumper sensor array?

Roomba has two bumper sensors (left and right, this is what is mentioned almost everywhere), if pressed it recognizes obstacles. Then what is the need of the extra array of IR sensors(6 in number). ...
0
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2answers
79 views

TSOP382838 IR receiver keeps outputting signal even if no infrared light is present [closed]

This is a beginner question. This is my first time using an ir receiver. The one I have is a TSOP38238. I have setup a simple circuit that consists of a visible led and receiver. When I have no ...
0
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1answer
106 views

Driving IR LEDs using PWM - measuring current & current source questions

For a project I'm currently working on, we're trying to drive 940nm IR LEDs (Kingbright L-934-F3C) using PWM, regulated by an Arduino Uno. We've run into several issues during our prototyping process ...
0
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1answer
51 views

Passive infrared sensor detection zone

I am using camera traps a with passive infrared sensor for my research and last week I decided to test their detection zones. I expected to find detection zone looking like this: with a certain ...
0
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1answer
97 views

Arduino cloning a IR signal

I have an issue here concerning Infrared and arduino, i have been disassembling various receivers and took out the IR sensor from them, but i have hard time to read any data from them. this is my ...
3
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0answers
64 views

building a remotely controlled remote controlled car :) [closed]

I am a newb to EE (I am a web developer). My friend works remotely and this is what I would like to accomplish: Build a web interface like this: When he visits this interface from a remote ...
6
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1answer
165 views

Why do Infrared LEDs come with different coloured lenses?

I'm just starting a project to build a universal Engineer's Remote Control Unit [EG. able to send the Panasonic 0xF2 code, etc.]. I have seen that IR LEDs come with (at least) three distinctly ...
0
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1answer
67 views

PIR in parallel [closed]

I saw this question and I think I have a similar problem/question. I have: IP Camera, DCS-7010L, 5 V, 1.2 A PIR, HC-SR501 (like the one of Kudos@Dave ... I think), 4.8-20 V(dc) input, 3.3 V output ...
0
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2answers
65 views

Can an IR transmitter be focused?

Can a transmitting IR LED (or an array of such devices) be focused into a finite area rather than allowed to spread out? I think this is how laser tag systems are implemented but I am not sure and I ...
0
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0answers
51 views

What specs of power supply should I get for an IR controller for RGB 5050 LED strip?

Here's the story: Bought an LED strip kit (including 5M reel (150x5050 LEDs, rated at 36W), an IR controller, 12V, 2A AC-DC power adapter and a controller). The power supply failed after a few hours, ...
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2answers
89 views

Simple & basic approach to Indoor positioning.Is it possible? [closed]

I would love to build a very simple and cost effective Indoor positioning system and i have a basic idea of how to get there..Kindly note that i have a very little knowledge of electronics... So the ...
0
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0answers
56 views

PIR sensor as smoke/fire detector?

We are looking for a sensor to be able to detect human activity(for security) , and also fire/smoke/heat etc , that doesn't consume a lot of current . I have read a few article,that you can achieve ...
0
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2answers
77 views

A question about ultrasonic sensors in general

Do ultrasonic sensors send out waves in a straight line, all the way to a reflecting substance (if any) and get reflected in the same line back to the receiver? Or do they send out a wave which ...
0
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0answers
22 views

Consumer IR receiver on RS-232 port without DCD

I want to build a CIR receiver for OMAP3530 SoC running Linux. I hope to be able to use LIRC library for this task. There's just one problem: the recommended IR receiver schematic uses DCD pin of the ...
2
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3answers
113 views

Why smartphone IR system uses an IC instead of GPIO?

I have an android based embedded system, and I would like to command ir controlled devices, such as tv, air conditioner, sound system...etc. I need both rx and tx. When I see examples on internet, ...
0
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2answers
187 views

How to amplify both phone audio channels in this case (infrared remote)

I'm a photographer and have limited knowledge about electronics. recently I saw this circuit: which is explained here I tried to Build it, it works fine on my laptop jack, but does not work on my ...
0
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2answers
50 views

Sending identification signal with IR or RF

Is there any way to build a device capable of sending an ID signal with IR or RF? For example, imagine I want my TV to know whose remote is being used (assuming everyone has a different remote). I ...
0
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0answers
26 views

I want To Make IR Transmitter Using STM32F2XX Controller

This is my First Questions here. I am making An IR Transmitter Using STM32F2xx. In my Project I want Implement the Pronto Protocol. My Question is, How i Transmit the code or string on IR using PWM ...
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1answer
92 views

Are IR phototransistors always dark, are IR LEDs always clear?

I've been working through the "Electronic Circuits for the Evil Genius" guide and someone bought me a components kit for the guide specifically. I already have some phototransistors where the plastic ...
0
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0answers
40 views

Proximity sensor for use in cotton crop field

I need some help. I am planning to make a bot that is supposed to go inspect Cotton crops. For that the bot has to travel in the lane between two crop lines. I want it to be in the middle of the lane ...
0
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3answers
71 views

IR LED for night vision LED driver necessary?

I am working on a project that requires a night vision camera. I have a small camera placed on the PCB and 4 IR LEDs placed around it to illuminate the dark room. The rooms are about 20-30qm. I have ...
0
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0answers
32 views

TSOP1738 IR False Triggering / Noise

Have been trying to figure out why the tsop1738 connected to my AVR is false triggering. When my circuit was not responding to the IR commands sent through the remote, I connected a logic analyzer to ...
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1answer
52 views

short circuit in a ir sensor

I am working on a IR sensor and i noticed that there was a short circuit. The voltage regulator 7805 output was getting clamped to 4v. And on my transmitter side i have connected 150 ohms resistance ...
0
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2answers
188 views

How much voltage to give my IR LED?

I got a new IR led, emitting light at 850nm. It says 5v reverse voltage and 1.5 forward voltage. How many volts should I give it? I have DESTROYED three other IR LEDs because of giving them too ...
1
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1answer
236 views

Can infrared electronics be harmed by an incompatible remote signal? [closed]

I recently tested a universal remote control app on my phone, for some reason it has a built-in IR blaster. The initial step is turning on a system by using one its codes. I tried to control my 2010 ...
0
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1answer
67 views

Can I hard wire an IR remote directly into the receiver?

I have a IR remote control and a clock (which it is designed to control.) I would like to remove the IR LED from the remote and the sensor from the clock, and run a wire between the two (so the clock ...
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votes
1answer
150 views

38 kHz signal arduino demodulation

I need to demodulate signal with frequency 38 kHz coming from remote controller without IR receiver. I need to demodulate it and as a result get information from it. Is there any examples of similar ...
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2answers
63 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 ...
0
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0answers
56 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 ...
0
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1answer
125 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 ...
0
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0answers
70 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 ...
6
votes
1answer
500 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 ...
0
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1answer
86 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, ...
0
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1answer
66 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 ...
0
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1answer
68 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 ...
0
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0answers
30 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 ...
3
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2answers
143 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 ...
0
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0answers
57 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 ...
0
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1answer
77 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 ...
0
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1answer
270 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 ...