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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Feasibility of Design: Using a TLC555 to Oscillate Three IR LEDs at 37kHz (schematic, datasheet, and calculations included)

Thank you for reading this. This post has four sections: purpose; parts, values/models, quantities, and datasheets; schematic, calculations, and other relevant info; and questions. Purpose To create ...
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How to get the desired signal from a photodiode and phototransistor multisim?

The above is a visualization of an IR transmitter and receiver circuit I'm building. Sending a 2v and 1khz sine wave through a photodiode to a phototransistor. The figure above shows the outputs I ...
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Detecting a location of the needle inside a cavity having multiple IR emitters , using IR Detector at the tip of the needle

I am working on a project where I need to find the location of a needle that has the IR detector at the tip of the needle. These needles are medical suturing needles that would help us to detect the ...
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What kind of sensor can sense Infrared radiation from any direction?

I am designing a device that uses a remote control with an infrared emitter and receiver. Originally I designed the device with a Tsop38238 but this sensor seems like it's better suited for a DVD ...
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132 views

Too many pull-up resistors?

I am building an interactive art project based on a large array of IR emitters and IR photodiodes -- there will be 240 photodiodes altogether. I know how to wire them to get the effect I want, and I'...
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33 views

Photodiode for PT2222

Recently I dropped my Bluetooth speaker remote and it stopped working. After testing it with remote control diagnostic tool (one of the cheap component testers from eBay that also decodes remote ...
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55 views

IR reciever somewhow being triggered by cell phone screen?

First time asking a question here. I am curious why the TSOP4838 ir sensor is acting eratically when my Google Pixel 2's screen is facing it. As you can see from the schematic, I have a 555 arranged ...
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2answers
51 views

How to increase range of IR emitter

I have an infrared emitter connected to a Raspberry Pi which allows me to send signals to my air conditioner so that I can turn it on / off / set settings etc. The problem with my current electric ...
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1answer
51 views

How to simulate the CNY70 IR reflectometer with TINA or LTSpice

How can I model the CNY70 IR reflectometer from Vishay (click here for datasheet) using TINA or LTSpice. In particular, I would like to simulate the circuit shown below: The 4pins on the left side ...
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75 views

140 IR LEDs at 30 MHz using a frequency generator

I need to blink IR LEDs at different Hz and I am going to use a frequency generator for that. The frequency generator is 30 MHz and that is the maximum I need to blink the LEDs. I was thinking to use ...
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38 views

What is the infrared controller in Nook Simple touch?

I got an old Nook Simple Touch from my brother and it worked before. But it has been covered with mold so I removed the plastic case and it still boots, but cannot respond to any of my touch. I found ...
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1answer
90 views

Why is the range on my IR emitter extremely low

I have built a simple prototype for a circuit attached to a Wemos D1MINI for a DIY thermostat application. I've confirmed that it works (I can turn it on and off from my software), when I hold the ...
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1answer
38 views

Reverse engineer a TSOP 1730 IR Receiver Module?

I'm trying to reverse engineer a small IR Receiver module to interface it to a new uC board, I'm designing for it. The original uC mother board got blown. It's for a mate who wanted to use the same ...
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111 views

Can we program our smartphone camera to detect the frequency and time period of IR light?

My use case is this: I am emitting morse code using a sole IR light source, and I intend to detect the frequency and the time period of the light source using my smartphone camera. Can this be done?
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53 views

How to calculate bias resistor values to drive IR diode

I'm creating a circuit to do communications via a digital serial infrared link. My requirements are for the link to support relatively high speeds (maximum serial bit rate is 4,000,000 bps or 4Mbps) ...
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72 views

Troubleshooting IR emitters using an Arduino

I've been trying to get an Arduino to replicate my air conditioner remote signal for quite a while and I'm almost giving up just based on how annoying this task is. First things first: The Arduino I'...
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49 views

Laser tag IR LED beam reflection problem

I built a laser tag gun using an Arduino,but there is a problem. When I use it indoors with lens or without I have beam reflections. If I shoot on the wall the reciever also claims a "hit." ...
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1answer
31 views

Appropriate power supply needed to power 15x 850nm IR LEDs

I have 15 IR LEDs that I would like to use as a floodlight for my exterior cameras. The thing is I have no idea how to calculate the total voltage and amperage needed. A single LED is rated for 1.7V-2....
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Simulate press on a rubber button infrared remote control with a Raspberry Pi

I'm stuck. I'm trying to use a Raspberry Pi to simulate a button press on an infrared remote control that uses conductive rubber buttons in order to control/automate a toy with Python. Really grateful ...
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1answer
62 views

Does my IR LED need a ground?

I have a circuit that connects an IR led to my Arduino. The positive leg goes to +5v and the negative goes (via a resistor) to a digital pin. However, I have since seen some pictures of IR circuits ...
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1answer
49 views

Power an Arduino Nano with the 5V port and use an LED

I have an infrared LED that uses the 5V port for power. However, I've read that you need to use the 5V pin to use AA batteries. Is it possible to wire the LED or the batteries to a different pin, or ...
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66 views

Why did cars switch from infrared key fobs to radio-wave key fobs? [closed]

Is an RFID key fob less likely to have its signal blocked? Or is it longer range? Or can it be made smaller, or cheaper? Also, how do infrared devices generate an infrared signal? With an infrared-...
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Standard pin out for 38KHz IR receiver to 3.5mm jack lead?

Is there a (rough) 'standard' for IR receiver 3.5mm jacks? I wish to use one of the many IR receiver to 3.5mm jack leads Ive seen for sale, however none mention the pin out. I'm sure all combinations ...
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39 views

Reading power supply value in the datasheet ; -0.3 V to 6 V ? ; Unclear

I am working on IR module and was referring to datasheet from Vishay. While looking at supply voltage it showed -0.3 to 6 V. I am unable to understand -0.3 V, how -0.3V can power the circuit. Then I ...
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324 views

Multiple infrared LEDs in parallel or series?

For a bird camera project, I would like to power 4 infrared LEDs from a Raspberry Pi as the light source for the Pi's NoIR camera. The IR LEDs (TSHF6410) have a forward voltage of 1.4V and a maximum ...
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65 views

How to overdrive a 5W IR LED for laser tag

I am a bit of a noob regarding electronics, but hey, I guess I need to start somewhere. Here is the premise: I want to build the Arduino Laser Tag Link: and all went fine until I stumbled upon ...
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2answers
95 views

Need help with break beam sensors for an art installation

I've been commissioned to create a piece of public art that fuses technology, light, and sound. The final piece must have six beams that can be broken and trigger musical notes. My first idea was to ...
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1answer
236 views

Getting IR signal from remote controller

I was trying to get a IR signal from a remote controller. I hooked the IR receiver to the oscilloscope and I got nothing. Then i brought the remote controller very close (~1mm far of the receiver) I ...
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1answer
65 views

How to read datasheets effectively to connect components safely?

I understand that many questions have been posted regarding datasheets, but I hope that you can help me with my question as well. If I want to know how many infrared LEDs (SFH 4780S) can be driven at ...
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389 views

Detect an IR signal with a photodiode to use it with a microcontroller

I am trying to detect an IR signal with a photodiode to connect it to my STM32F411 and use it as a trigger signal. The signal I send are two pulses at 500 kHz which looks like this: I am using a ...
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2answers
685 views

200 mA output from the Arduino digital output

200mA and 0.2V are needed to turn on a mid-IR LED. Given that the output current of each digital pin in Arduino UNO is 40mA, is sufficient current provided by simultaneously connecting 5 pins to the ...
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Need help with IR Transmitter circuit

I'm working on IR transmitter circuit. But R77 feedback resistor creating confusion about its working. I know it's acting as a current limiter to the LEDs but confused about its role in feedback. Can ...
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52 views

How to strobe high power led while maintaining constant current

I am trying to make a high power tv-be-gone. For those who don't know, it uses arduino or attiny to run through every IR power code for most tv brands. I have made regular ones that use several 5mm IR ...
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Need Help with the transistor configuration? Biasing methodology used in circuit?

I am confused about how this circuit works, the circuit is the instrumentation for IR sensor even I have never encountered the such biasing, the IR led is activated with the pulse of 150 us the output ...
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1answer
106 views

Need help with an IR demodulation circuit

I'm trying to reverse engineer a PCB and made a schematic. The bad thing is I only have PCB images from both sides, not the actual PCB. This PCB is used to detect a very small black object spinning at ...
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2answers
39 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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64 views

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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101 views

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
74 views

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
31 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
66 views

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
68 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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93 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
45 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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123 views

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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261 views

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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