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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36 views

What is the highest possible optical output power of an SLED?

I am inquiring about this because I'm looking for a suitably high-power, large bandwidth light source for a fibre optic communication system I am designing. The distance the data will be required to ...
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How to calculate the spectral irradiance of an array of LEDs?

Good morning, how can I calculate this equation? The LEDs have the following specifications: https://www.mouser.com/datasheet/2/143/EAILP05RDDB1-708504.pdf _ 12 LEDs; 3 second exposure; 20cm distance ...
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Is there any dedicated IR receiver IC with atleast 5 output pins

I want to know if there is any IC available that can decode an IR remote to its different pinouts or I have only option to program a microcontroller to achieve it.
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Remote's IR signal viewed in my phone's camera is flashing. Shouldn't it look steady with a 38kHz carrier frequency?

I know I'm missing something fundamental here, but you can imagine the Google results I get trying to find this out! Shouldn't my phone cameras recorded fps/exposure be way way waayy much slower than ...
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What is the range of an IR sensor in a prototype comparing to real life application?

I'm currently having a prototype which involve using an IR sensor for obstacles detection. But the results required a comparison of the range result I obtained from the prototype to compare it to a ...
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2answers
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Headphone jack IR transmitter not working reliably

I'm working on a project to build a remote control app for some IR controlled toys like DeskPets, Robosapien, TOMY etc. including an IR transmitter that (hopefully) has a very high range. I built an ...
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1answer
29 views

Distance range IR sensor

What should be the distance between the object and the sensor (TCRT5000L), for sensor to be able to detect it? I foun in datasheet operating distance is 0.2 to 0.15mm, but it seems little to me.
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1answer
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How do FLIR cameras work with multiple spectral image acquisition?

I am looking to buy a FLIR camera, but it is hard to get in contact with the company. I wonder if somebody already used, or has knowledge about my question, which FLIR cameras can capture images in ...
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Battery to AC conversion of faucet IR sensor

I bought this faucet which includes a hand IR sensor, but it's battery powered. I wanted to convert it to AC power using this excellent Video as a guide. Since it takes 4 AA batteries, I bought an old ...
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1answer
58 views

Missing modulation in IR signal?

I have a cheap IR remote control from Ebay (like this one) and I´m straggling with the modulation of the IR signal. I use an BPV11F photo transistor as receiver and I get this signal with my scope ...
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2answers
68 views

IR vision application [closed]

I'm trying to make an IR visible object tracking device. Is there any way to convert visible machine vision camera to an IR vision camera datasheet link: https://wiki.dfrobot.com/HUSKYLENS_V1....
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1answer
31 views

Trigger motion sensor

I'm trying to trigger a motion sensor on a door (for fun and to learn more about these systems) using Arduino based electronics (ca 5V, ca 50mA). According to Wikipedia, these sensors (PIR sensors, ...
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Would this photodiode sensor work better in series or parallel?

I am working on a photodiode small object sensor that detects and records signatures of objects passing through an array of photodiodes facing an array of IR LEDs. I am connecting the photodiodes to ...
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stm32f407: usage of PSC in IrDA Low-power mode

Finally, I received my stm32f407 board, and a sample USART C project. The project comes with a Stm32f4xx_usart.c file (not HAL driver). I want to figure out what ...
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Reflective optical sensor

I am working on a project that uses a TCRT5000 reflective optical sensor. Sensor datasheet is here I tested this sensor in a room, the voltage at the output pin is high it is above 2.5V. While ...
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What technique (ultrasound/infrared) should I use to detect seeds inside a fruit? [duplicate]

This fruit is simplistic as there is a thin skin surrounding it. Inside it is a tiny ball of liquid and that is where the dense seed forms. The is seed much more denser in comparison with the liquid ...
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1answer
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Essential difference between normal irda mode and low-power irda mode?

guys, I'm learning stm32f401x mcu. All I have is an rm0368 reference manual pdf file. No mcu chip right now. From the manual, I learnt that PSC instead of ...
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3answers
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Accurate way of measuring liquid volume with arduino [closed]

An Arduino project of mine involves measuring the amount of water that falls through a liquid dispenser. It is imperative that this value is EXACT since this will be used for further calculations. Now,...
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4answers
161 views

Reducing IR proximity sensor module power consumption

I have built a rechargeable automatic hand sanitiser using an IR proximity sensor(HW 201.) It consists of an IR proximity sensor module, TIP 32 transistor, 3-6 V DC pump, TP4056 charging module and a ...
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2answers
91 views

Help in understanding a IR repeater schematic

I'm relatively new to electronics projects, as a hobby. So please bear with me. I want to build an Infrared Repeater as a small project. I've found a component which I think will work nicely for the ...
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1answer
40 views

how to put Atmega328 to sleep mode and wake it up without button,without WDT

iam building a IR based faucet i need to include battery backup here iam using only ATmega328 with crystal and capacitor, iam not using regulator or LED ...i need to increase the battey life iam using ...
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4answers
211 views

How can I prevent my IR sensor from sensing the sunlight?

I want to use an IR sensor for object detection. An LED will be turned on if an object is detected. But because of sunlight, it's malfunctioning (i.e. always getting logic 1). So, how do I omit the ...
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2answers
90 views

Best power transistor for a high PWM output from ESP32

I need your advice whether to use a Tip122 Darlington transistor or a BD137 medium-power transistor Or a IRL3705 MOSFET to drive 10 Parallel infrared LEDs. Each LED has a forward voltage of almost 1.2-...
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2answers
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Burn hazard of IR LED Array Question

I am performing eye safety calculations on a device and I have hit a roadblock. To perform the calculations I have been following the IEC 62471 "Photobiological safety of lamps and lamp systems&...
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1answer
89 views

Are IR LEDs placed under the same category as lasers?

I am creating a device which uses IR LEDs to illuminate the human eye, while an IR camera records the pupil dilation. From my research, I see that there are two standards which are related to the ...
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1answer
63 views

How does one calculate the spectral irradiance from an array of IR LEDs?

I would appreciate any help. The question may seem similar to the question asked at this link: Help me calculate spectral irradiance of an LED from a LED spec sheet , but the answer was never given or ...
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1answer
31 views

Wiring SIX IR_LEDS

I am trying to wire six IR LEDS with three parallel sets of two IR LEDS in series. Each set has its own current limiting resistor and they all share a common 5V line at their anode and are connected ...
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2answers
41 views

IR Leds to be Driven by Coin cell

Can a coin cell with rating >= 500 mAh be used to drive a set of 3 IR LEDs if each takes 100 mA forward current? I'll be drawing 300 mA (3 LEDs) current continuously from the cell, I heard that ...
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1answer
55 views

Problem in editing EEPROM of MLX90614ESF sensor , pic 18f4620 , I2C communication

I want to edit Tomax and Tomin in the EEPROM 0x00h and <...
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2answers
128 views

DC mini pump not working when connected with IR sensor and MOSFET [closed]

I have designed a circuit which uses an IRF540N. The circuit is for switching on the pump when the IR sensor is activated. I have checked the output with a ...
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1answer
69 views

IR LED won't turn on, but white LED will in IR repeater circuit

I have this soundbar in front of my TV, and I need to stretch my arm to operate it with the remote, so I decided to make a IR repeater as a starting analog-only (no programmable MCU) electronics ...
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71 views

Confirmation of connection between TSAL5300 IR sensor and BPW34 photodiode

I need to check whether my NIR LED sensor and BPW34 photodiode connection are correct or not. Does my IR sensor have to be infront of the photodiode? I am going to place my finger on the IR sensor to ...
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1answer
24 views

Camera - Auto Night Vision “Mode” (ON only when dark)?

I am wondering how night vision "mode" could be automatically switch on & off in commercial CCTV? Something like this: https://www.youtube.com/watch?v=ilaXGtsx-DU (video demonstrate CCTV ...
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Why does my TSAL6200 Infrared diode have a short range

I am using a Vishay TSAL6200 Infrared diode to control a Dakin AC unit. It worked fine as long as the controller is within 4 – 6 ft of the AC unit. I would think it would have a longer range. I must ...
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5answers
2k views

Material that doesn't let microwaves through, but is transparent to IR

Does a material exist that is transparent to infra-red light, but is opaque to microwaves (S-Band, about 2.5 GHz)? I am basically looking for a filter I can put in front of a infra-red sensor.
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one-shot circuit with infrared sensor

If our hand is near the infrared sensor, it will remain in HIGH condition until we release the hand from the sensor. How can an additional circuit (without a microcontroller and without another ne555) ...
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1answer
25 views

Advice on setting up sensor switch

Hi I would like to fit a (motion sensor/IR sensor) sensor switch to a machine in my catering van. The machine is a 12v machine. I would like to start the machine using the sensor switch and would like ...
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1answer
41 views

Help identifying this SMD component (IR sensor) [closed]

I have a mini differential IR sensor PCB that serves as the bed probe for my 3d printer. Looking at the SMD components, there are a few items I can not find or identify. Does anyone know the part ...
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1answer
122 views

Motion sensor to detect birds and small animals but ignore humans

I would like to develop a motion activated sprinkler to deter birds (cranes and other smaller birds) and small animals from eating the fish in my pond. I am using the approach of controlling a ...
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1answer
39 views

Dealing with a weak remote [closed]

I've got these LED candles with a remote: I've owned a few different models of LED candles in the past, and these ones are the best so far. They have a great-looking, strong light, and realistic ...
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1answer
120 views

Want to replace push-button with IR receiver

In the diagram below I want to replace that push-button switch Sw1 with IR receiver, I tried a lot with different combination with IR receiver and tried with transistor but I failed, so, please how ...
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0answers
43 views

Recording IR data directly from Remote Control

I am trying to record the IR codes from my projector's remote. Nothing seems to be working and I need some help. I want to be able to directly record the IR signals that my remote is putting out when ...
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4answers
323 views

How to make an IR proximity sensor work in daylight?

I am trying to make a touchless water tap using an IR proximity detector. I used a simple circuit: It works well inside room but it doesn't work in daylight. It remains active in sunlight and if I ...
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2answers
97 views

Is there a safe or better way of using an AAA battery in place of an AA battery in small electronic devices/ sensors, when in bind like pandemic?

Is there a safe or better way of using an AAA battery in place of an AA battery in small electronic devices/ sensors, when in bind like pandemic? For possible use in small electronic devices without ...
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1answer
58 views

Minimize power consumption IR receiver

I am designing an embedded system where I need to minimize power consumption in standby mode (ideally no additional consumption from the IR receiver circuit when in standby) This system will be ...
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1answer
53 views

Only half of the IrDA packages are received correctly

I have a STM32F765ZITx as master and a STM32F051C8Tx board as slave that im trying to communicated with each other over IrDa. The master is sending 6 bytes (2 startbytes, 1 length of data byte, 1 ...
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23 views

Can I drive several LEDs using a Li-Ion charging chip

I have several IR LEDs (1.2-1.8v) and I would like to run them in a semi protected environment. I can run them off of an 18650 3.7v battery with the diodes in series however if a fault occurs in just ...
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1answer
40 views

Calbration of an infrared sensor

I found on a site that it is important to know the temperature of the infrared sensor while calibrating the infra red sensor, but I could not find the real reason behind this. Anyone knows it?
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29 views

Infrared temperature sensor

I'm trying to build (starting from scratch) an infrared temperature sensor. I don't want to use Arduino or similar, instead, I chose to use the ATSAMV70Q20. I've never built any sensor (I'm doing this ...
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Identifying integrated-circuit on an IR presence detector - top markings 633 O6 (or 06)

I'm trying to identify an SMD component that is used to manage presence detection via infrared echo. An IR LED emits a 3 us pulse, and the unidentified component filters the signal received by a ...

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