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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IR Transceivers for smartphones

Sorry if this questions sounds unrelated. In that case kindly forward this to appropriate forum. I'm looking for any IR transceivers that can be plugged onto a smartphone (either via 3.5mm jack or ...
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USB Breakout Infrared

"Usb breakouts" provide power, ground and signals in. Infrared receiver diodes need power, a ground and a signal out. Will the USB breakout transmit data out from the infrared diode if connected? If ...
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59 views

Voltages to keep my circuit running at 200mA with NMOSFETS

Im trying to build a circuit to send information using IR led, using pulse signals my leds (TSAL6400) operates at 1.35V, and their maximum pulse current is rated 200mA After struggling a bit with ...
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4answers
131 views

How to increase the current in this circuit?

Im trying to build a circuit to send information using IR led, using pulse signals (Im trying to mimic a home appliance remote control). My leds (datasheet) operate at 1.3V, and their maximum pulse ...
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1answer
44 views

Retrofit a Hi-Fi remote with a RF 433 MHz module

In the past I used a remote for a AIWA Hi-Fi to control a AVR processor and circuit I custom made. I used an infrared receiver from Vishay (tuned on the 38 kHz) to demodulate the signal, then fed to ...
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37 views

Driving a 5V IR led with a 5V charger?

I'm trying to build a remote control with IR led. I'm experiencing low range with my 1.5V, If=50mA IR leds, so I looked for and found a 5V, If=100mA IR leds. twice the current, hence probably better ...
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284 views

Dangers of IR LED

I would like to build a DIY laser tag system. The website milestag recommends a Vishay Tsal-6100 as IR-LED. Here is a datasheet: http://www.mouser.com/ds/2/427/tsal6100-279822.pdf Since I want to ...
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58 views

TSOP 38khz reciever Vs. IR phototransistor

I'm trying to make an IR beam break detector, TSOP1738 is pretty neat, but it has gain attenuation and it makes things complicated for me. I decided to use a simple IR phototransistor, I ...
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1answer
44 views

Indoor Location Tracker for Automated Cameraman

I am new to Electronic Hardware, but have prior experience with Custom built web applications. Recently purchased Raspberry Pi and have been thinking of different projects to make with it as the ...
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0answers
39 views

Pulse sensor IR/photodiode does not detect blood flow

I'm following this tutorial on makezine. It doesn't work. http://makezine.com/projects/ir-pulse-sensor/ Suppose we put our finger on the photodiode and IR on the left of the schematic, the output ...
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1answer
67 views

Help me calculate spectral irradiance of an LED from a LED spec sheet

I am not a physicist or engineer, and that is why I turn to you for help. This is a new post from an old topic. This is a repost because important information was absent from my first post on this ...
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1answer
87 views

Receiving continuous 38khz IR signal

I want to detect objects crossing a line. I decided to use one IR led (with a 555 circuit to generate a 38khz signal) and one 38khz receiver (TSOP1738). But after testing it on a breadboard I found ...
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55 views

(Infrared LED Circuit) Can i use this circuit with 3.3v logic?

I made this circuit for a 5v logic. I plan to use it as a remote control. So pulses. i hope that with this circuit i achieve more range as with the default remote. I already made it but now i have ...
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0answers
25 views

TSMP77000 IR Sensor Module for Remote Control Systems

I use tsmp77000 IR sensor module for remote control systems with tv remote controller. Tsmp77000 has active low output. is from output of tsmp77000 with tv remote controller on/off. And from my ...
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2answers
83 views

IR LED - Help me convert 'Maximum radiant power' to irradiance (Watts per meter squared)

I am not an electrical engineer or physicist. I am trying to understand if the light emitted by an LED poses an eye hazard. A manufacturer has a device that has LEDs in it. They are infrared LEDs. ...
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2answers
39 views

Drive IR LED with maximal power (for IR barrier with max distance)

I'm making a light barrier and working on a "sender" part right now. The main thing I want to achieve is the maximum distance. I'm using Vishay TSSP4038 for receiving signal. In the datasheet it's ...
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0answers
50 views

Making an IR transmitter with a range of 3-4 meters

I am designing a vehicle counter in a parking facility. What I have to do is to detect if a vehicle enters the 4 meter wide entering of the parking. I was initially trying to make an IR receiver and ...
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2answers
126 views

On/Off switch controlled via IR

I'm a beginner at electronics and I'm trying to construct a battery-powered LED lamp which I could turn on and off using an IR remote control. My question is what parts do I need apart from an IR ...
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2answers
266 views

Powering mutiple Infrared LEDs through a single Arduino Uno pin?

I'm doing this project where I control an RC Car using infrared. Everything is perfect with 1 IR LED, connected to a 220ohm resistor. I'm worried about the range of the signal so I'm thinking of using ...
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0answers
49 views

Press and Hold IR Button (like Volume Control) to control Relay

After weeks of trying to figure this out I'm still stuck with this problem. I simply cannot find any way to make this work using IRlib. Essentially, what I'm trying to achieve is a simple Volume ...
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5answers
100 views

Is there a sensor for counting the number of cards in a flipping scorecard? [duplicate]

I have a stack of cards and want to know how many cards are in the stack at any given time. Any thoughts on how I might be able to do this? Would it be possible for me to put a tag on every card and ...
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0answers
38 views

IR Protocols: Start Bit Meaning

For the past weeks I've been learning about IR protocols. I've been searching the web about these protocols and I've found great databases about them, such is SBProjects. I've notice that some ...
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1answer
78 views

Build a thin line follower?

I'm building a line follower robot with just 3 sensors to follow a black line of 1cm. However the distance between my each of my sensors is also 1cm. Straight path following is not a problem. However ...
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2answers
93 views

How to test IR sensor module?

I am a beginner and trying to make an IR sensor module for my project. I have implemented the following circuit diagram on my breadboard. The problem is that even if I don't introduce an obstacle in ...
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1answer
24 views

Problem with a infrared integrated transistor IS1U621

Hi I'm working on a project in witch I need to use the IS1U621, the circuit implemented is: but no matter what I'm always getting voltages over 3v on the output, anyone has a tested circuit that I ...
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72 views

Fast detection of transient temperature change.. RTD? Thermistors? Thermocouples? or something else?

If I want to detect temperature changes on the order of 10ms, what is the best technology to use (besides IR)? I know Thermocouples and RTDs are pretty slow.. not sure about Thermistors.
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72 views

Why is my IR sensor giving wrong high voltage output?

I've picked up some IR sensors from a local electronics shop. The shopkeeper had no idea about the specification/part-no of the sensor. I've assumed it to be TSOP38238 as my sensor looks exactly like ...
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2answers
88 views

emitter follower conofiguration

I need help with the following configuration , using LIRC for as the source signal for infrared led transmitter circuit with raspberry pi . when putting the infrared led emitter led above the ...
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0answers
76 views

Are there any IR-Receivers availible for the carrier frequency 455kHz? [closed]

I need to find a component replacement or for the obsolete IR Receiver chip TSOP7000 from Vishay. It uses a 455kHz carrier with the modulation type OOK (On-Off-Keying) and it is able to transfer data ...
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2answers
61 views

Photogate IR LED or laser

Hi I am trying to build simple photo gate to measure speed of incoming ball. I decided I will use one photo gate with high frequency. Because ball is much smaller then the box, which is comming in, ...
2
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2answers
56 views

How does IR thermal vision work?

How are IR thermal-vision devices able to present us with "invisible" imagery in such a way that we can actually interpret it? What I'm really trying to wrap my head around is: How a sensor can ...
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1answer
114 views

How to capture, save, and rebroadcast an infrared signal?

I need to capture a signal that is being sent from an emitter (similar to a TV remote). I understand from this question that I can use an infrared receiver to do this.Once this is done, however, I ...
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4answers
191 views

What type of photo sensor/light combo best for detecting a falling drop of water?

I am trying to setup a rig for water drop photography. This is where you take a picture as a water drop is impacting against another object or body of water. The trick is to detect the drop as it ...
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2answers
884 views

What is the purpose of the IR-diode Cover on Remote Controls?

Some electronic devices' remote controls have their IR-diode covered with some glossy, dark acrlyic-glass like screen, others dont and you can directly see (and possibly touch) the IR-diode. What is, ...
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2answers
84 views

Is it possible to measure multiple photodiodes on one pin?

I'm trying to use multiple photodiodes to detect passing objects. Currently, pins are at a premium. Is it possible to use an array of photodiodes on one or two pins? VCC and ground are not counted. ...
2
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2answers
165 views

Very simple signalling over 12V DC power wire?

I found some DC power line comms circuits but they seem too complex for my needs. I have 6 outside LED RGB lamps that are linked with a single 2 core cable running around the edge of my garden, it is ...
2
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2answers
165 views

Can I create a multiplexed array of IR photodiodes?

I'd like to use an Arduino to read from a large number of IR photodiodes. I have seen this question: How to Use SFH235 IR Photodiode Correctly? and would like to use a similar technique to the circuit ...
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2answers
120 views

MLX90616 Infra Red Temperature Sensor problem

Recently I have been trying to interface with the MLX90616 an infra red temperature sensor by Melexis. After reading the datasheet I have I have written a program to take the object temperature ...
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2answers
208 views

Can a 38kHz IR receiver module (TSOP38238) decode 870Hz pulse modulation IR?

I'm trying to reverse engineer my A/C remote controller IR. I've decoded the IR signal as a NEC code with the PJRC IRremote library. My attempt to retransmit the same code to A/C unit was ...
2
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1answer
76 views

IR Reflective Sensor Accuracy

I'm working on a project that utilizes an array of IR sensors and recievers to map objects directly in front of it. This is similar to the various interactive coffee table setups that light an LED ...
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2answers
91 views

IR photodiode doesn't show 38kHz carrier wave on oscilloscope

I have an IR photodiode, part number PDB-C134F, as shown here. I'm trying to use it to retransmit a remote control signal that uses a carrier frequency of 38 to 40kHz. However, when I connect the ...
2
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2answers
88 views

Detecting numbered cards in a stack?

We are attempting to electronically determine which of 10 cards, numbered 1-10, is currently in front of a stack. Initially card 1 is in front. Eventually card 1 will be flipped around to the back ...
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0answers
36 views

Measuring Near Infrared Light

For my project I want to illuminate an area of 600x350mm, from a height of 600 mm, with NIR (~840nm) LED's. There is a camera making images (at 600mm height) in the NIR spectrum. During the day this ...
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1answer
50 views

Infrared Door opener

I have a case here, in the main entrance corridor, we have a door which have an automatic door opening mechanism if you push a button. There is also an IR receiver, I was planning to make a ...
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3answers
82 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 ...
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1answer
78 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 ...
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81 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 ...
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1answer
68 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 ...
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1answer
51 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 ...
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2answers
119 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 ...