Tagged Questions

2
votes
1answer
91 views

Can I electronically trigger a PIR motion sensor?

I would like to trigger a PIR sensor using an infrared LED. Is that possible? My goal is to simulate motion in front of the PIR, when there otherwise is none. I tried using a handheld remote ...
1
vote
1answer
130 views

How to choose an IR receiver?

I am working on a project that requires an IR receiver module to detect particular buttons pressed from a SONY Stereo Remote. I have a regular kind IR receiver that looks like this: The problem ...
-1
votes
1answer
110 views

Motion Detection Sensor [closed]

I want to create a simple Arduino-based motion detection sensor system. I'd like to put it behind some sort of covering for protection from everything going on around it. What type of sensors and ...
1
vote
1answer
339 views

IR-Receiver signal almost constant

I have followed the tutorial from Makezine about an Infrared heart-beat sensor, and I have essentially used the same components listed on the video (that is, the same resistors and the same IR Emitter ...
10
votes
6answers
525 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 ...
2
votes
2answers
478 views

How do I properly use Sharp GP2Y0A21YK0F sensor?

I've recently obtained Sharp GP2Y0A21YK0F IR distance sensor and I'm not sure how to make a proper circuit for output measurement, since I'm getting lots of noise. The only thing datasheet mentions is ...
0
votes
2answers
276 views

Good IR LED for tracking with webcam at high speed from up to 50 feet

I'm looking to do some motion tracking on a badminton shuttlecock with a hacked webcam(s) and an IR LED. I went to radioshack and got a few leds but it seems that if i don't point them right at the ...
3
votes
4answers
2k views

Reducing the sensitivity of a PIR sensor?

I have several of these PIR sensors. I am hoping there might be a way to reduce range/sensitivity to a very small field. Currently they are detecting motion about 15-20 feet away. Does anyone know ...
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 ...
3
votes
2answers
995 views

How do I calculate Distance between two sensors?

How do I calculate the distance between the two light sensors (ie. Infrared LED and PhotoDiode). Actually I am designing a device based on the similar principle of GPS to control the mouse position on ...
0
votes
2answers
319 views

Creating an IR sensor

Is a PIR sensor as easy as just a receiver? Rather than use some pre-canned device I was planning to just hook up an IR LED to my microcontroller and then read the IR sensor/receiver for a threshold ...
3
votes
1answer
911 views

What are the relevant parameters for a reverse-biased LED light sensor?

Following this appnote (PDF) on using photodiodes, I'm connecting an IR LED as a light sensor and emitter, configured like this: To emit light, I pull PIN1 high ...
4
votes
3answers
2k views

Cheap effective proximity sensors for detecting people?

I'm building a small device that will be mounted on the ceiling (along with many other identical ones), facing downwards. I'd like to detect when someone walks underneath it. Due to the constraints of ...
1
vote
2answers
178 views

Which infrared bulb should I use with a photodiode?

I'm currently using a photodiode (found here) along with the appropriate emitter to send data between mobile robots. I'd like to the sensor to optionally be used as an ambient light sensor using a ...
0
votes
1answer
939 views

How can I use a Integrated IR Receiver IC in a sensor circuit without microprocessors?

I am asked as a term project to design a circuit that is somewhat similar to a park sensor. Let me first say that I am a 2nd year undergrad student, and we are very newly beginning to get into the ...
5
votes
1answer
384 views

Problem regarding Stephen Hobley's lib for Pixart Sensor

I wonder whether anyone here would have actively worked with the Stephen Hobley library for Pixart Sensor here. I used the same hardware configuration as mentioned in Stephen's website. However, I run ...
4
votes
2answers
280 views

Distance sensor IR

I am building a distance sensor..I have the ucontroller portion done. I was going to use IR to reflect a beam and get a proportional analog voltage to estimate distance but...it has no range Any ...
5
votes
4answers
688 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 ...