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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29 views

Why does this IR receiver not receiving some signals?

I am trying to read some IR signals. There is a synchronizer emitting modulated IR signals. And my receiver must receive those signals and interpret them. Actually, there are only two different ...
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0answers
31 views

Sensing a light object on a plane [on hold]

I'm attempting to complete a project involving a microcontroller and some sensors. I want to detect that a very light object (20 grams) is touching a place at four different points of contact. Some ...
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1answer
41 views

determine ir protocol without ir controller

I have the following issue: I bought an ir controller for my Blaupunkt radio which has an built in ir reciever.The problem is that the controller does not works togather with the radio. Its seem they ...
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2answers
84 views

wirelessly remote-controlled DC power supply with variable voltage

I need a remote-controlled (wireless) power supply, outputting between 0 and 10 volts and 0 and 2 amps, preferably DC. It should take 110v/120v AC as input. Its voltage should be controllable with a ...
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0answers
24 views

IR sensor circuit with a Switch to select Digital or Analog Output

I was designing an IR sensor Module for kids to play with Arduino. I was giving them a digital IR sensor with comparator i.e. LM358. But I figured it out that wall following will be difficult with ...
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2answers
48 views

Estimate current produced by an IR photodiode on a typical sunny day

How can I estimate or calculate the current which would be generated by an infra-red photodiode (eg. Osram BPW 34 FAS) on a typical sunny day ?
6
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2answers
946 views

Why are infrared LEDs used in optocouplers?

I read that optocouplers and optotriacs use infrared LEDs with infrared sensitive transistors. What is the idea behind using IR frequency but not visible light freq. LEDs inside a completely closed ...
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5answers
89 views

Low-voltage rectification

I have a 19kHz square wave line-level audio signal (~2Vpp) that I hope to rectify in order to drive an infrared LED at 38kHz. So far, I've been using a pair of LEDs, wired in parallel in opposite ...
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1answer
41 views

Trouble shooting IR Sensor

I am trying to build a heart beat sensor. I implemented the application circuit suggested by the datasheet of the sensor. But I get a constant reading at the Arduino. I confirmed that the IR ...
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3answers
118 views

Please explain why this simple circuit is latching 'on', but only when a fan is attached

My son and I made a circuit using an electronics kit. It's supposed to work so that when the IR receiver receives a signal from a remote control, it turns on the motor. It does that, but I noticed ...
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1answer
28 views

Infrared Generator Circuit Calculations

I'm looking at my friend's notes on choosing resistor values for a simple infrared generator circuit. I don't quite understand it and was wondering if you guys could help me. I understand how they ...
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2answers
121 views

How to calibrate the MLX90616 IR temperature sensor?

I have purchased some Melexis mlx90616 IR temperature sensors. The data sheet states that a calibration “by the customer” is required. By contacting my purchaser I got the answer: "The supplier has ...
0
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1answer
123 views

How to increase voltage drop across LED? [closed]

Hi I am using LED of 1550nm(Datasheet Link Attached) thorlabs.and voltage drop which I am getting across it is 0.866V. I have connected a 60ohm resistor in series and voltage which I've provided is 5V....
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1answer
67 views

periodic spikes in analog sensor

I am using Arduino duemilanove and a Sharp gp2yoa21 sensor for proximity sensing. Now i will be using it to calculate the distance as well so i need pretty consistent and smooth data. But i observe ...
0
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1answer
58 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
49 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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1answer
31 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 ...
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1answer
49 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
86 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
53 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
32 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 , ...
0
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0answers
42 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
90 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 ...
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1answer
131 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
93 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
40 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 ...
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2answers
93 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
249 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
88 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 ...
0
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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 ...
0
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1answer
72 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
172 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
67 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
61 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 ...
10
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1answer
423 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 ...
0
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1answer
144 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 ...
0
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1answer
125 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 ...
2
votes
1answer
158 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 ...
4
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1answer
158 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 ...
0
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1answer
118 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
votes
2answers
141 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
82 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
61 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
182 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
457 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 ...
1
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0answers
106 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
votes
5answers
125 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 ...