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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51 views

I2C to IrDA - any pitfalls?

I need to operate a peripheral chip via bidirectional I2C across a significant air gap (30mm) and powered wirelessly. Has anyone done the I2C to IrDA? Any problems? Any better solutions? I want to ...
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1answer
37 views

Speed and direction control of motor by using IR & 555 on Proteus. (Circuit with errors is attached.)

I am trying to control motor direction & speed by using IR and 555 on Proteus. Circuit and errors images are attached. Please help me solving this quagmire.
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0answers
35 views

producing spectrum with wavelength of 755nm [closed]

I need an LED or something else to procuce infrared waves with the wavelength of 755nm. the closest LED which I found on the web has 740-750nm waves
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1answer
27 views

Using TSOP17XX IR Receiver with IR LED

I'm building an LED transceiver to communicate between two computers using serial communication. For this purpose, I'm thinking about using an IR LED bulb to blink according to the 1s and 0s bit ...
0
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1answer
40 views

Making an LED Transceiver Circuit

I'm building up a project to transmit data from one computer to another computer from a wireless media and I have to use LEDs for this purpose (As per the requirements of the project, so I can't use ...
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3answers
45 views

IR Receiver(rx) not receiving a continuously signal from ir led(tx) rather than it receiving at first instant of time while transmitting

I m making line follower bot using sensor-(IR RX and IR led). Here is my Circuit for IR tX Circuit for rx This both circuit are working properly my problem is IR Rx not receiving signal ...
3
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1answer
38 views

IR sensor for line follower not working in day light

I m using IR sensor ir tx and photodiode for rx for my line follower bot it's working in normal light and night time but when put in sun light it's not working all ...
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1answer
30 views

Schematic Infrared Break Line Alarm Receiver

Can anyone help me with the attached schematic, I don't really understand were the line of " VREF" connects to , maybe I can not see the trees for the forest! 9v cheers spike Hi Thank you all , ...
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0answers
30 views

IR remote unstable button numbers [migrated]

Question Is there a reason for unstable button numbers of an IR remote? Desciption I wrote a remote class where I identify the pressed number of the remote to set states. But however I get never ...
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0answers
31 views

What kind of sensor i should use to detect object that blocked the light?

i want to ask about the sensor i should use for this problem. My problem is i want to detect if there something blocked the light. Im also ignore light from environment, so consider there's no light ...
0
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1answer
77 views

How to wire multiple ir photodiodes on one arduino pin?

I'd like to use 50 ir photodiodes. But, I'm not sure about it because I want it to be read only on one analog pin of an arduino. My idea is to wire parallel like in this picture. But, I'm just ...
0
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1answer
117 views

When wiring IR Phototransistor, why is a pulldown resistor needed?

My phototransistor looks like the one here, wired like this: I don't know the exact model or anything like that. It came in an Arduino kit and was labeled "flame sensor". I used an arduino to ...
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2answers
73 views

Wiring 5mm IR LEDs in parallel [duplicate]

Im trying to wire 9 5mm IR leds in parallel using a 9V battery. the forward voltage is about 1.5 and Im looking for about 100mA instead of the ussual 20mA with a standard LED. When I punch these ...
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1answer
35 views

Decoding UART over IR

I have a system transmitting UART (38400) over IR with a carrier frequency of 425khz. How do I take a receiver led and feed this into a microcontroller. Obviously I can't just put it through an op ...
0
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2answers
83 views

Building a 3D IR scanner with USB power [closed]

I am trying to build a 3D scanner which can work with USB power. I am using an IR camera and a IR projector. I would like to scan objects up to a distance of 4m (indoor) with minimum 640x480 ...
3
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1answer
67 views

Help identifying modulation scheme

I'm trying to identify the following modulation scheme being used to transmit a infrared code. It looks like manchester, but there's some gaps where there's no transitions. The code being ...
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2answers
152 views

How does a 4 pin IR Object/Proximity Sensor work?

How does this IR Proximity/Object sensor work ? Any resources or tutorials on how this works would be really helpful. I want to use this for my raspberry pi NOTE : I have searched a lot on the ...
4
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1answer
74 views

Sharp Infrared sensor-Filtering supply ripple

I am using Pololu's sharp infrared sensor board part# GP2Y0A60SZLF and I am trying to minimize the noise caused by the sensor on the voltage supply as much as possible. I have made a filter and ...
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1answer
50 views

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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1answer
70 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
152 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
61 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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1answer
50 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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1answer
340 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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1answer
106 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
98 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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1answer
114 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
127 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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1answer
89 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 ...
2
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2answers
117 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
65 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
60 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
167 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
362 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
87 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 ...
4
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5answers
116 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 ...
0
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1answer
101 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
393 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 ...
0
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1answer
26 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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2answers
87 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.
0
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1answer
127 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 ...
0
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2answers
104 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
80 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 ...
2
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2answers
77 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
68 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 ...
1
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1answer
191 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 ...
3
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4answers
299 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 ...
7
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2answers
984 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
113 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
191 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 ...