Tagged Questions

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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13 views

IC similar to U2538B for IR filtering 46kHz

For an infrared receiver I need to bandpass filter a signal with a carrier of about 46kHz. Normally one would buy an IR receiver with built in signal conditioning, but they don't seem to exsist for ...
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0answers
20 views

Datasheet for Keyes IR Transmitter (KY-005) wanted

Can someone help me find the datasheet for the Keyes IR Transmitter (KY-005)? I know how the pins work, I just need to figure out its voltage drop and how much current should go through it. Thanks! ...
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2answers
77 views

Which SMD component as IR barrier?

I have a PCB design that uses an infrared proximity detector in the form of an IR LED and an IR transistor placed with about 10 mm spacing between them. Now the problem has arisen that I need some ...
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2answers
92 views

Calculate mosfet gate resistor?

I got this schematic : In the image you see; I'm driving two infrared leds at 40 Ma each one with a FDN327N Mosfet. Attached at D8 there is one of Teensy 3.1 digital output that has HIGH voltage ...
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1answer
50 views

Photointerrupter issue

I have circuit with photointerrupter GP1S092HCPIF. The documentation is rather weak and D-shape pin strange but I need a small SMD type. I hopefully identified pins correctly and when soldered on ...
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1answer
34 views

Is it possible to limit IR led so sensor detects it only if you aim at it?

I will have IR led and IR sensor as in TV. As you know, even if you don't point at the TV you are able to change channels. My question is, is it possible to limit it somehow (maybe by putting the ...
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0answers
32 views

Sony RMT-CE75A protocol

I am planning to use an old Sony remote I found around my house for a remote control project. It has the remote number RMT-CE75A and it says Radio Cassette. I am trying to figure out the protocol ...
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0answers
23 views

Custom IR LED controller for two independent strips

Is there a way to modify a controller with IR remote to control two separate led strips independently. Basically you have two strips, one controller, one remote and you can change the color|turn ...
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0answers
35 views

Does any module exist with two separate PIR sensors?

I would like to use two separate sensors to detect a range of situations. subject from the right, subject from the left, from the middle (dual trigger), ignore one side, determine length of ...
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3answers
82 views

What is the cheapest sensor that can detect a wall regardless of color?

I'm making a small toy that will use the sensor reading to avoid colliding with a wall. Before buying the sensors I want to confirm that can they detect green, pink, or white colored walls.
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2answers
164 views

Use 555 for additional 40KHz PWM in Arduino

I need to transmit infra red signals using IR LED from my Arduino device. The IR signals consist of PWM 40 kHz periods and "silence" periods of various length (typical IR remote signals). I know ...
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0answers
31 views

Simple non-ultrasonic rangefinding beacons?

I am looking for a range finding beacon system, where beacon A will tell me how far it is from beacon B, with an operational range at least 7 meters, and preferably omni-directional. It cannot use any ...
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0answers
42 views

IR Emitter seems slow

I have a circuit same as in following question: Why would an IR remote circuit use one resistor/transistor pair for each LED? Except that I am driving the 2N3904 base from a LPC810 (DIP8) and I have ...
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2answers
160 views

Will my 12V power supply ever burn these IR leds blinking at 38kHz even without a resistor?

I'm new to electronics, my background is mostly on the software development side... so go easy on me, as this might be a really stupid question. I just want to be sure what is safe to assume and what ...
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1answer
80 views

Safe line IR laser which will be seen from 15 meters by camera module

What characteristics (wavelength, mW) IR line laser should have to: be seen by camera module from 15 meters outdoor in day-light too safe for eyes line as big as possible thickness of line should ...
-1
votes
1answer
84 views

Small low-power device-to-device proximity detector

I would like to find or create a small low-power proximity detector to tell a device when another device is near. This would be coupled to a small microcontroller like the AT-tiny 45. It doesn't ...
0
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1answer
131 views

How to amplify the signal of a TCRT5000 phototransistor

I'm trying to read the IR signal from my Itron C1S Power meter. It has an emitter that lights up for 10 ms every Wh of consumption. This question is based on my prior question: Use a photoresistor ...
2
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6answers
217 views

Control a lot of IR sensors with Arduino / Build a game board tile

Is it possible to control a lot (let's assume 100) of TCRT5000 IR distance sensors with one Arduino? So just use one or a few pins but not 100? I am relativly new to the Arduino/electronics area and ...
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1answer
60 views

Explanation and usage of LM324

I am trying to make a line follower robot using LM324 as comparator, but I cannot understand the theory or the explanation of this circuit. I also don't know how to calibrate it with the IRs.
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1answer
79 views

High quality IR projector for depth detection

I want to build my own depth sensor like the way Kinect does it, using IR and a Camera but I can't find anywhere where I can get the "IR Camera". I do not need a CMOS board as I will be computing ...
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3answers
339 views

Sending audio over infrared?

I am an undergraduate and new to electronics. I wanted to know if it is possible to send audio over an infrared LED? I plan to use a 555 timer to generate PWM output with carrier at around 44 Khz to ...
0
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1answer
97 views

Two arduino unit communication

OK plain and simple I'm not sure to use IR or RF. This is short distance up to maybe 10 ft. I have an Arduino Uno that I have all set up here. I press a button and it carries out its code. This is ...
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1answer
64 views

Interesting observation on strange behaviour using motors and IR transceiver

I am working on a robot with with the following specs: Two coin type vibration motors rated at 3V for locomotion Motors triggered using two darlington transistors (sample schematic shown below) ...
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2answers
60 views

Issues related to Bit-banging transceiver modules

I have two Infrared Transceiver modules from TFDU4101-TR3 on two separate boards each interfaced to ATMega164PA microcontroller. To drive these transceivers an endec is needed which I have not used in ...
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2answers
122 views

How to connect IR sensor ( Infrared detector/receiver )?

Would you give me a hand ? I have an IR sensor with 3 pins. It looks like the one in the picture, and I did not find any datasheet for it on the internet. actually, I have 3 questions : 1- I want ...
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3answers
112 views

How can I increase the range of an infrared emitter?

I'm currently using this set of infrared emitters and detectors. It appears that I only get about 10 cm of signal before the detector doesn't pick it up. It's on +5v power with a 10k pull-down ...
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1answer
124 views

How much power/intensity IR Diode should have to be seen from 30-50 meters

How much power/intensity IR Diode should have to be seen from 30-50 meters by camera with IR pass filter? Must be a good point in a photo. Should be seen in a day light. Preferably with wide angle. ...
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2answers
161 views

What's the difference between an infra-red and a normal phototransistor?

I was wondering if there is any difference between an infra-red phototransistor and a normal phototransistor. I was also wondering if either of these would be directly compatible with an Arduino? ...
2
votes
1answer
130 views

Beam Angle vs Viewing Angle

I am looking at the product specs for an IR light and see that it has: Beam Angle: 50 deg Viewing Angle: 25 deg What is the ...
2
votes
1answer
444 views

Converting Pronto hex codes to raw on/off pulses

I'm really just getting my feet wet when it comes to IR protocols and IR codes in general, so my knowledge and understanding may be a bit shaky here. I am a programmer and am trying to create a tool ...
1
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2answers
199 views

Transistor Ohms

I've built the circuit in the schematic below to control my TV, the D1 and D2 LEDs are the two mini LEDs from this IR Extender: I've cut it below the female headphone jack and I'm using my ...
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2answers
102 views

Why is IR Transceiver transmitting/receiving rubbish?

I am trying to interface two microcontrollers wirelessly using IR transceivers. The microcontroller I'm using is ATMega164PA running on a 3.3V supply at 8MHz and the transceiver is TFDU4101-TR3. I am ...
0
votes
1answer
71 views

Micro Controllers to control Solenoid valves upon receiving signal from PIR Motion Sensor

I am using a PIR Sensor of Sparkfun(Model 8630) to detect human's presence in washroom. If there is no human presence in an interval of 30 minutes, the Solenoid Valve connected to pipe line in the ...
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votes
2answers
444 views

Robot following you; what's the best way?

I built a human-sized robot that can follow anyone wearing an IR beacon. It works quite well indoors and it's quite precise, but outdoors it is completely blind due to sunlight infrared. I have a ...
1
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1answer
132 views

Can an IR camera be used in broad daylight?

I am wondering if it is at all possible to have an IR camera that can be faithfully used in broad daylight. I have already seen this question here, but I am looking to understand if a full blown ...
2
votes
2answers
122 views

Can I use this IR Transceiver for communication and obstacle avoidance?

I am building two robots. For communication and obstacle avoidance I am using Infrared. I bought this IR transceiver TFDU4101-TR3 (http://www.farnell.com/datasheets/1675739.pdf)which I thought I could ...
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0answers
124 views

Poor man's IR obstacle sensor make sense(improve) from signal under daylight

I'm talking about this kind of sensor: Question and then long description: can I do something to improve their blindness in front of window? At least for detection of object in front of the robot, ...
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1answer
70 views

Need Superbright Infrared Emitter [closed]

I need a superbright infrared emitter(800nm to 1000nm) with a 90 degree horizontal and 4 degree vertical field of view that will be clearly visible 100 meters away. And it needs to have a rise/fall ...
0
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1answer
62 views

Which schematic should I use with CNY 70?

I have tried this three schematics (pictures below), and they all seem to be working mostly the same. So I can't choose which one to use, and what are the advantages/disadvantages. Any ideas ? P.s. I ...
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1answer
60 views

What is the wavelength of an Itron C1S IR LED?

I'm trying to find an appropriate IR Phototransistor for an Itron Centron C1S Meter. But I can't figure out exactly what is the wavelength of the IR transistor used by Itron. Do meters have standard ...
0
votes
1answer
316 views

Use a photoresistor to read an IR LED from an Itron energy meter

I want to read my meter at home with an Arduino board. My meter, an Itron C1S, has an IR emitter that pulses once (10ms width) every Wh. I want to know if it is theoretically possible to use a ...
0
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2answers
151 views

IR proximity sensor

I have built an IR proximity sensor using a normal 940nm IR LED, Tsop 4856 kHz IR photodiode. I have used 555 timer to generate pulses to the IR led. the circuit is working correctly as far as I know. ...
0
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1answer
59 views

3 Pin IR Reciever Schematic

I have been looking for this on google and couldn't find it, what does the schematic look like for a 3 pin IR reciever (ground, +5v, out)?
2
votes
3answers
312 views

Sequence multiple IR remote commands (button presses)

A bit of a story here: I would like to be able to quickly and easily turn on/off captioning on the cable TV box. Normally this would require 10(!) button presses. It's hard to be sure, but I expect ...
1
vote
1answer
51 views

Detecting ball moving between IR pair and handling ambient light changes

I plan to use the SEN-00241 IR Emitter and Detector pair to detect a ping pong ball moving fast between them. I understand I could watch for voltage changes to detect this passing object, however how ...
1
vote
1answer
101 views

Difference between infrared heating tube coatings?

I'm converting a toaster oven to a SMD reflow oven and have found the thermal momentum of the resistive elements to be a problem (standard dark-grey type). So I've been searching online for some ...
2
votes
1answer
57 views

IR receiver part interchange

I've got an old stereo that doesn't have a remote control. There was a model that did, and after looking at the service manual it looks like I just need to populate a PCB with an IR receiver to add ...
1
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1answer
229 views

IR proximity sensor for automatic spraying

I am a beginner in field of circuits, so excuse me for my amateur questions. Let me explain my task: I have to build a low cost proximity sensor for a sense and spray device. I have read various ...
2
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0answers
139 views

Helicopter rotor blade system detection approaching objects

I am working on this project to detect anything that is entering the zone of RC helicopter blades (around 10cm diameter) region and stop the rotor. It needs to detect any solid object so metal or ...
2
votes
2answers
104 views

Creating a large motion sensing plane

I want to try and create a "motion sensing plane" where users can have contact points (their hands) detected when it passes through an invisible plane. Think of it like a giant tablet touch screen, ...