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Questions tagged [infrared]

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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Protocol used by IR LED reciever (50W driver)

I have a 50W LED driver with a IR remote control that i want to controll with a microcontroller. I hooked it up to my oscilloscope to try to decipher the data sent between the IR reciever and the ...
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2answers
318 views

How is the Correct Surface Load of a Heating Element Determined and Verified?

A heating element should be operated below its maximum surface load (power per surface area.) For a given element, one might be tempted to say the surface load is the power given by Ohm's law divided ...
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0answers
478 views

Teensy 3.2 Comparator

I am trying to create a comparator on the Teensy 3.2 to convert an IR receiving diode signal from analog to digital. Currently I am using an op amp, but that takes extra space and extra power, both of ...
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2answers
79 views

Is this the correct way of building a voltage divider through this Link

I’m trying to build a voltage divider through following the instructions on this link http://raspberry.io/projects/view/reading-from-a-mcp3002-analog-to-digital-converter/#step1 I have connected the ...
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3answers
58 views

how do I connect the infrared distance sensor to the breadboard?

Someone said I was suppose connect the analog to digital converter and the infrared distance sensor to the breadboard by following this link:http://raspberry.io/projects/view/reading-from-a-mcp3002-...
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0answers
383 views

Simple remote-controlled momentary switch

I need to create a momentary switch which is controlled remotely, preferably through IR from an old TV remote control (if possible), in order to answer my office door buzzer without getting up. On ...
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1answer
178 views

Is it possible move mouse cursors via IR pins?

In a mouse (with ball) there are IR sensors and phototransistor sensors (in pairs) to check the movement of the mouse in both axes. For each axis, there is the following configuration: http://...
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2answers
2k views

Why are many IR receivers in metal cages?

I'm guessing it's a Faraday cage around the receiver, but don't know why they might need one. Is there some sort of common interference around 38kHz (their operating frequency)? It's the only ...
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0answers
131 views

Simulate IR remote heater

I am trying to simulate the same IR code coming from my Heater remote control, but it seems like is not a standard code transmitting. I have took a part the device and I discovered there is a CHIP ...
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0answers
95 views

Are common IR LEDs harmful to the eyes?

Is it safe to look at the IR LED clusters on security cameras that are commonly available? They seem to be quite capable of lighting up a distance of 6m. What is their energy density? I'm not sure if ...
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2answers
129 views

Detecting and counting metal plates

I need to detect and count a number of metal plates coming by my sensor. I need to do it cheap as possible. There are around 1-2 centimeters between the plates, and they are 3 centimers thick. The ...
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1answer
464 views

How to use a Phototransistor and photodiode?

I don't expect my parents to spend the money required to get a ballistics chronometer for me so I decided it would be easier to make one from parts laying around in my room. I have the general plans ...
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1answer
165 views

Contact-less liquid level indicator [closed]

I am developing a Liquid level indicator to be used for my lab breaker. The purpose is to get real time liquid level data on computer for analysis. I have searched for many liquid detectors, but ...
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1answer
6k views

How to test if an IR sensor is broken?

I have a feeling my IR sensor does not work. To make the most 'low level' test possible I want to check if the +5 and GND are working/are on the pins I expect: On the right pin put +5 (according to ...
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1answer
192 views

Why using a IR sensor instead of a IR sensor module (1838B)?

I bought an Arduino kit and it contains two sensors for IR (if I'm correct). The first is a looking exactly like a LED but black (but heard it is a IR receiver). The other item looks like this; ...
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1answer
1k views

Any way to measure distance through water?

I have a barrel of clear liquid which has sediment build up at the bottom of a barrel. Over time I want to measure the build up of this sediment. Nothing can touch the liquid and I can't place ...
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1answer
689 views

Reversed IR LED receiver?

Are there IR diodes out there? I do not need a reverse-bias IR receiver, I need the opposite (which I think will just result in a simple diode). Basically: When the sensor "sees" IR light I would like ...
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7answers
4k views

How to generate constant 38 kHz square wave for IR light source?

Application: IR light barrier over a distance of 1m Receiver: e.g. Vishay TSSP4038 IR sensor (tuned to 38 kHz) Ambient temperature range: -10 to 40° C Here I’ve found a circuit with a Schmidt trigger ...
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2answers
229 views

Is making LED at 10MHz blinking rate good?

I am trying to create a project for transmitting visible light over optical fiber. I am planning for a frequency of 10MHz for data transfer. Is a LED(including infrared) good for this blinking rate? ...
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2answers
550 views

IR Transmitter for smartphone

My understanding problem is as follows : on figure 1 for the signal 2 (noted: S2) . If I understand correctly, the LED cannot reach S2 signal because polarity. Carrier Frequency is 38 KHz let ...
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1answer
702 views

Building a compact and bright 940 nm IR light source? [closed]

I'm working on a small personal Airsoft related project and have been looking at ways I can make a bright 940 nm light source. Hoping to be able to illuminate 20 m or greater area so that I can see ...
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2answers
80 views

Does the device (transmitter & receiver)needs to be stable for IR data transfer?

I need to transmit my measured data of torque and temperature (measured using RTD and strain gauge) from a Rotating shaft running at 7500 rpm through IR communication. Is it possible? does line of ...
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1answer
6k views

How to check if IR receiver is dead or not ?

I have an IR Receiver , but I am not sure if it works or not, I want to make sure weather it's burnt or not, How can I test this with Multi meter ? If it can not be tested with multi-meter, Is ...
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1answer
260 views

IC capable of transmiting IR over multiple pins

recently I have been looking for a way to define a pin on the Arduino Uno. once I got that right I expected that I would be able to send IR signals over at least 5 pins.This would be because I had ...
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1answer
190 views

Claulating the resistance for the IR Flame Photodiode sensor

Hi I wish to make a IR Flame sensor. I have made a schematic as below. But I could not determine the values for R(x) & Rpot(y). I have tried x = 10K, y=10K , x=1K , y=10K,etc (randomly). But I ...
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1answer
130 views

IR signal strengh measurement

I have an application where I have multiple IR transmitters/receivers set up to read data. These are removable and can be set up in a lab environment where I can control distance, light, etc. I've ...
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2answers
736 views

Can I use the IR break beam sensor outdoor/indoor for 4-5 meters range?

I need a sensor which can count a fast moving object. I am thinking to use IR beam break sensor. But, I think there will be a problem with the sunlight as the Tx-Rx will be 4-5 meters apart. I also ...
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1answer
74 views

How do I offset flashing of IR remote in Arduino? [closed]

I am working in Arduino on a mini pro. I have an old MP3 remote which transmits infrared at about 38Khz. I have a program written that when my infrared sensor is picking up on a signal from the remote ...
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1answer
587 views

maximizing IR range and peak current

I ordered a bunch of infrared detector diodes (aka IR diode) and infrared transmitters. luckily the detectors are blue (and don't respond to normal room light). I am planning to order a bunch of ...
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3answers
3k views

Understanding voltage and current of a phototransistor w/ collector resistor

I want to study the circuit of an Infrared proximity sensor, so I assembled a circuit with an infrared LED (940nm) and a phototransistor. When no current passes from the LED, obviously the ...
3
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4answers
3k views

How to detect a heat emitting object in a distance from 10 - 50cm?

If I have a heat emitting object like a heater, radiator or hot cup of coffee, what sensor can I use to detect it by the fact that it is emitting heat? I have hc-sr04 sensors but they use ultrasound ...
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3answers
973 views

IR receiver output pulsating instead of constant one('5V') or zero ('0V')

I am trying to detect the size of different bottles on a conveyor belt and for that I thought of using IR transmitter and receiver but I am not getting desired output. I want the output of IR receiver ...
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0answers
142 views

Simple IR gate switch

Regards to all I'm totally new with electronic and I need help with some schematics. I find one circuit that fits my needs: simply instantly turn on the LEDs with press of a switch and dims them on ...
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1answer
64 views

PIR motion detector or Emitter receiver pair or? [duplicate]

I have a simple 3 ft by 3 ft goal. I want to electronically detect when a ball passes into the goal but not when it goes wide. I had initially thought i could use a simple PIR motion detector ...
5
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2answers
257 views

Which is the phototransistor in Lesson 11 Evil Genius?

My son and I are on lesson 11 on page 39 in Electronic Circuits for the Evil Genius second edition by Dave Cutcher. We have run into a problem in lesson 11. It uses an infrared LED LTE 4206/IR 3mm ...
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1answer
283 views

Broken Photodiode - how to find a replacement?

I have nearly no knowledge at all in electronics - but maybe you can help me :) I got here a vintage moving message LED sign (brand: litek lmr 6002) and it seems that its controller is broken. The ...
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0answers
616 views

How to interface optical M-bus on heat meter

I have Landys Gyr heat meter 2WR6, which has optical port for M-bus communication. I would like to periodically read its values via Arduino / RPi / NodeMCU / whatever. From the technical manual (p. 7)...
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1answer
504 views

USB powered IR emitter for night vision webcam

I had a spare webcam which i turned it into a night vision camera. I have to use IR emitters to be able to see with it ( http://www.instructables.com/id/Night-Vision-Webcam/?ALLSTEPS ) and i don't ...
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1answer
299 views

IR emitter LED with jack 3.5

Currently I'm using an IR LED connected directly to a PCB where an Arduino UNO is connected. When I send a command with the Arduino, the LED sends what I want to an IR receiver. Now I'm thinking to ...
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3answers
283 views

Using IR thermometer for measuring component temperature

I'm trying to measure the temperature of various steel components being heated using power frequency induction heater. The IR meter being used can be set for emmissivity value of 0.1 to 1.0. For the ...
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1answer
2k views

Arduino LED dimmer with IR remote control

I want to make an LED dimmer with IR remote control using Arduino, by pressing each number in the remote control give different luminescence for example number 1 give 10% duty cycle and number 9 100% ...
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1answer
933 views

High power IR transmitter circuit for ESP8266

Currently I am using this IR transmitter circuit for an ESP8266: It works, the reception is not bad, but I need a little bit higher power to control my AC unit. The AC unit is ca. 10 meter away from ...
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2answers
104 views

Are Optical Detectors/Phototransistors safe?

Are Optical Detector/Phototransistor such as QRD1114 safe? The QRD1114 emits infrared, which high exposure to, could be harmful. If I had a matrix of 10 x 10 QRD1114's, and a user must stand in-...
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2answers
2k views

Astable 555 frequency problem

I'm trying to build an oscillator circuit for driving several IR LEDs at 38 kHz 50% duty cycle. The circuit layout I used is shown below.(Source link: http://www.electronics-tutorials.ws/waveforms/...
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1answer
68 views

Selecting infrared non-contact temperature sensor

I want to select non-contact infrared temperature sensor for measuring temperature I have following question regarding its selection: My basic doubt is whether i am using Glass-container or metal ...
2
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1answer
538 views

Help identify this IR receiver

This part came out of a Logitech nanoVX mouse. It is the IR sensor that is part of the scroll wheel mechanism. It has letters LT written on top and on the back it seems to have "H0fVE" or "HOfVE" or ...
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0answers
161 views

Where do I place a decoupling capacitor when the power supply is intermittent?

I'm building a low power obstacle detector. I have an infrared LED and a IR photoresistor wired up to a BLE Nano (a tiny bluetooth IC) running off a small 3v coin battery. My code basically does this....
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1answer
690 views

Arduino: IR receiver, current draw and resistor

I was looking for an IR receiver example using an Arduino and I found this site (https://arduino-info.wikispaces.com/IR-RemoteControl) which contains this image of how to wire the IR receiver... I ...
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4answers
185 views

How to improve reliability of infrared signaling?

I built an AVR-based gadget (bare metal AT90USB162, not Arduino) that receives an infrared remote signal and does some stuff. For testing, I used a random TV remote that I had, and it's VERY reliable:...
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2answers
4k views

Hardwire rgb-led-controller instead of Infrared

I think most of you know these cheap rgb-strip-controllers with ir-remote. I try to control it via hardwired gpio from raspberry3, simply replacing the ir-receiver. from ...