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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75 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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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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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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40 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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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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1answer
48 views

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

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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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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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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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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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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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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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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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
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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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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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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
102 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
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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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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
48 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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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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36 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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28 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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129 views

Why add resistors to a Transistor Vin and GND

I am following a tutorial where the author uses an infrared sensor (L-51ROPT1D1 on the left) as an input to an arduino GPIO. I am not using the emittor on the right, I am only using the receiver to ...
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What IR Protocol is this?

This was found on a window fan remote control. The fan is a Bionaire BW2300 It seems to have no AGC leader, 12 bits, my guess is each bit is either: ~420us on + ~1260us off ~1260us on + ~430us off
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Linearization of IR sensor GP2Y0A21YK

How do I linearize the graph analog output voltage against distance for IR sensor [GP2Y0A21YK][1]? This is the non- linear graph, I’m not sure how to make it linear? [1]: https://media.digikey.com/...
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What's wrong with that circuit? IR circuit with a relay and a regulator

• I want to power up the IR Circuit and the pump with the same powering source, in order to do that I used a 5V Regulator. • The OUT of the IR circuit is 3.3V. I have some problem here, when I ...
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1answer
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Wall Detecting Robot [duplicate]

I am looking to build a robot that will zig-zag back and forth down a hallway. I am wanting to build an IR LED beam and detection circuit so that the robot will detect the wall and change its ...
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2answers
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Vs1838B break beam problem

So im using ESP32 to output 38khz 40% duty cycle wave to ir led and connecting a vs1838b on the other side. The vs1838b works as it outputs LOW when i send a signal from my remote. Anyways, after the ...
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My IR receiver becomes erratic after one motor in the circuit starts spinning

I am trying to make a remote control car using an Arduino Uno and IR receiver modal VS1838B. The system worked as planned except that IR receiver gets erratic after any one motor spins. upon starting ...
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Infrared detection distance

Using IR receiver in open collector configuration as shown in the schematic, the maximum detection distance is about 15cm. How can I increase the maximum detection distance? Current IR setup: ...
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1answer
131 views

IR led extremely slow to turn completely off?

I'm working on a project where I'm simply reading the amount of light emitting from an IR led with an IR sensor. For some reason, after the IR led reaches full luminosity, it takes a minimum, whopping ...
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1answer
76 views

How to simulate a phototransistor in a circuit, prefereably in ltSpice?

I copied a circuit from a working pcb, which is detecting small IR intensity changes. I like to simulate it in ltSpice but I dont know how?! notes on circuit: the transistor is bc847, op amp is lm324, ...
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Determine location using IR transmitters and receiver

Let's say I have multiple IR transmitters with known relative locations. Each transmitter emits a unique frequency. I also have an IR receiver in an unknown location surrounded by the transmitters. ...
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1answer
38 views

Direct contact to infrared receiver from microcontroller

I have posted this question also on arduino forum but can't get more answers there. So basically I have an old DVD player that has an IR (infra red) receiver and I would like to automate it with a ...
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1answer
47 views

Gate-Souce resistors needed?

I completed an IR emitter circuit with two selectable power settings. It's working on the breadboard and I'm asking if I need the gate-source resistors for stability? As the circuit is battery powered ...
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Change current in steps for pulsed LEDs

I want to control the power consumption and intensity of a IR LED which is fed by a 38kHz signal. Can I add mosfets in series with different resistors (25/250) like in my schematic? Application is a ...
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89 views

How to properly connect IR photodiode

I encountered some problems with the signal from photodiode and don't know how to connect it effectively. Datasheet can be found here: https://www.marktechopto.com/pdf/products/datasheet/MTPD1346D-...
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1answer
52 views

Proper phototransistor for detection of small object

I am attempting to detect a falling objects 6mm in diameter, falling every 160ms. The object to be detected will be confinined to a black tube, void of light, 18mm wide x 35mm long, my plan is to ...
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Will a 950 nm IR emitter work with a 870 nm phototransistor?

I'm planning to build a simple IR light barrier across a distance of 15 mm. I plan to use this receiver with this emitter. The reason is to have some SMD PNP capable components. The emitter and ...
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1answer
142 views

Making a Remote Control for My TV from Scratch

This might seem silly to many of you, but I lost my TV remote when I moved awhile back and instead of buying a universal remote for cheap, I want to make a remote for my TV from scratch myself. I'm ...
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1answer
54 views

IR emitter to keep TV on

We installed some TVs in the main floor of our facility. We have personnel here from 8am until 12am, and the TVs have been set to turn on at 7am and off at 1am. Sometime during the day, YouTubeTV asks ...
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3answers
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Infrared Sensor for drug detection [closed]

I saw that there has been a push to make a drug detector that can identify cannabis since it has been legalized. I was looking at mouser.com and found this ir sensor: https://www.mouser.com/...
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Do I need additional power for an IR LED diode 50 feet away from a Raspberry Pi?

I'm creating a central remote to control my mini-split HVAC units. Those units are controlled with an IR remote. Each unit is in a different room of my house. I have everything working on my ...
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182 views

I want to use logic analyzer to learn remote control IR codes

I've just ordered this generic logic analyzer (didn't get it yet). Does the specs (channels/speed/accuracy) of such a cheap analyzer can be used to analyze IR remote control code sequences so I'll be ...
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1answer
60 views

infrared and K-Type temperature sensors badly disagree [closed]

They are both cheap. There is a piece of PCB balanced on top of the K-type thermocouple's probe; there is also a red laser light from the infrared thermometer right in the middle of the same PCB where ...
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IR Proximity Sensor Not Responding

I'm trying to build an IR proximity sensor using a simple tutorial found online. Here is the schematic and here is the link of the tutorial : https://www.instructables.com/id/IR-Proximity-Sensor-1/ ...

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