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.
10
votes
6answers
526 views
Ideas to measure 2D position of an object constrained to X-Y plane
I am working on a project, and an aspect has come up where I would like to measure (track continuously) the X and Y position of an object across a 2D plane. The object is moved by a person, with the ...
3
votes
1answer
540 views
IR Demodulator - How Does It Work?
I have a circuit here which was designed by others. It takes a 32.768 kHz IR input and outputs a logic low when the input is present. I see 3 distinct stages... everything up to U1A, everything ...
5
votes
4answers
689 views
low voltage motion sensor
I am looking for a motion sensor device that can track person/animal walking by it and record time/date of the event(s). It needs to be able to run on a small battery or two (maybe 2 AA's or a 9 ...
2
votes
2answers
244 views
IR rays over carrier frequency of 34Khz?
How is IR rays that have carrier frequency of ~1014 Hz generated by GaAs in remote control carried over carrier frequency of 34Khz to the sensor?
2
votes
4answers
1k views
Using 38 KHz IR receivers to measure distance
Can I somehow use Vishay's TSOP series IR receivers and IR LEDs to measure the distance from an object? Has anyone done that before or has any idea how one could do it(clever programming or circuitry, ...
1
vote
3answers
319 views
How to short two nodes electronically
I am using a Phillips SAA3010 IR transmitter IC to send a modulated IR signal. The IC has two types of inputs:
Z0---Z3
X0---X7
And one type of output:
DR0---DR7
Each legal operation ...
11
votes
5answers
1k views
Sensor for detecting airsoft bullet
I'm trying to make airsoft chronograph/chronometer (a device that measures airsoft bullet speed). The idea is to measure time in which bullet is traveling from point A to point B, and then I can ...
4
votes
8answers
4k views
How to make IR proximity detector immune to the daylight?
I am trying to make an infrared proximity measurement device.
I want it to be in the range of 10cm or 4" (maybe 15 cm?). The frequency I use is 10 KHz. Here is the circuit I used, except that I have ...
3
votes
1answer
825 views
Best wavelength for IR LEDs to be used with a hacked up IR camera?
So, I recently saw this question and thought it looked simple enough. Instead of a webcam though i used an actual (but old, 3MP) digital camera. The camera was a bit broken anyway(always exposed with ...
2
votes
3answers
826 views
Powering LED with 9V battery
I want to take an LED and power it with a 9V battery. I just don't seem able to get the math right.
Taking an average 9V battery and a 10mm LED, what kind of resistor would I need and how do I know ...
3
votes
1answer
658 views
IR Audio Receiver and Transmitter
Let me start by saying that I am a newbie on this, trying to do some hobby stuff. I am a software professional trying to interface with hardware (maybe getting into Arduino).
Using this information ...
2
votes
2answers
55 views
Arduino IR practice vs. application circuit on 1838 datasheets
There is an explanation of wiring up IR remote controllers for beginners at arduino-info.wikispaces.com/IR-RemoteControl, which suggests wiring the output pin directly into an Arduino pin. I've tried ...
1
vote
0answers
32 views
Infra-Red with arduino
Good Day,
I am trying to build a universal receiver transmitter with an arduino. Basically, I want to understand first how the IR protocol works on normal remotes. Is the signal transmitted modulated ...
1
vote
1answer
183 views
How to re-generate a previously saved SIRC protocol waveform?
I am trying to replicate the remote control for my Sony home theater system. I started with anaylzing the demodulated signal of power on button using a TSOP1738 IR demodulator. It looks like this:
...
0
votes
1answer
153 views
ATTiny 85 + shift register + ir sensor
I had the ATtiny working with the shift register, but when I added the IR receiver to the code the shift register did not work as desired.
I have a shift register connected to 8 LEDs and controled by ...
0
votes
2answers
542 views
RoboCup Junior IR Ball detection
RoboCup Junior uses an IR ball which emits pulsing infrared light (before this it was a steady beam which sensors could not differentiate from environmental sources). A presentation outlining the ...
0
votes
2answers
409 views
Test if webcam picks up infrared
I know the good old-fashioned way of shining a remote at a camera to see if it picks up infrared, but I'd like to know if there's any code that does it for you. That'd be much more professional.
