Hello All, I'm new to this forum and I am seeking some information on a certain ultrasonic transducer element, PE-50. It's a 1" diameter ceramic piezoelectric...
Hi All, I am working on the Design of a Magnetic Sensor, this sensor is a part of security system. This sensor should be able to detect human intrusion, can...
You could have a coil generating a high frequency field, and then use a sensing pick-up coil to measure variations in this field. However, this forms pretty...
The human body has a miniscule magnetic signature. Why do you want to use a magnetic sensor? You will probably pick up watches, belt buckles, rings on...
A plate would work but an outer ring around the room at various field projection points that bounce back to the plate will indicate where the intruder is...
... Shafali, Start with the name -- I think you mean dissertation, not Dessertation. See: http://en.wikipedia.org/wiki/Dissertation. Profs can get really...
Along the past few years, Ain Shams University Students’ Scientific Society has annually organized one of the world’s most well renowned and prestigious...
hi i have used this sensors about one year but i always have used +5 dc volts as the power but i now want to supply heater with pulses but i dont know with...
Disclaimer: I've never used the MQ series sensor. I've just read the datasheet. Why do you want to drive the heater with pulses? Do you want to turn the...
If any of you are familiar with the Nintendo Wii remote, it uses a Pixart Multi Object Tracking Sensor to track up to 4 IR sources. I am looking for an IR...
Im looking for an optical sensor. The closest thing I have found is the one used in the Nintendo Wii where the remote tracks the distance of the IR LED lights....
Happy New Year (2009). I wish the best feelings in life!  Feliz Ano Novo (2009). Eu desejo os melhores sentimentos da vida. Márcia Ferraresi Araújo Student...
Hello, I'm trying to construct an underwater detection system capable of detecting an object the size of a softball or larger when it enters the water. There...
On Wed, Jan 7, 2009 at 7:35 PM, sciencegirl31415 <sciencegirl31415@... ... Hello sciencegirl, - how is this water contained? a swimming pool, a tank,...
... There are few possible solutions to pinpoint a source of light (LED) resulting in distances and positions. One I am considering right now is the use of...
Thank you for the response Wagner! The water is contained in a swimming pool with calm water, 30ft wide, 50 ft long, 15ft deep, no light in the water. The...
Thank you Muhammad! Could you recommend an "off the shelf" sonar range finder that could be altered to create an electric signal/alarm when the range changed?...
Years ago based on my daughter's national research, I developed an electronic fence to protect small children to falling into a swimming pool. The fence was...
Hi there people. I am working on a 2-electrodes ecg project but I am having some problems. I can have my circuit working when I use a simulator but not when I ...
Can you just measure the conductivity of water. With a gap in your prob that in normal condition no current can pass and as soon as it getting wet the path...
I think the conductivity change from a softball dropped randomly into a swimming pool of water is going to be REALLY hard to measure... unless Scott has some...
What sort of signal ARE you getting? Is it nothing at all? Is it DC saturation? Is it 60 Hz? Try using a battery powered scope, or a scope running on an...
I don't know why it is hard to measure. The glouse meter measure conductivity of a test strip after you put a drop of blood to wet the test paper. Here all you...
If you're still considering sonar, the closest off-the-shelf (OTS) thing is a fish finder, or a depth sounder. Here's a depth sounder (depth transducer),...
Scott, Are you proposing to use the conductivity sensors to detect the splash from the object (softball), which falls into the pool? I think, in this problem...
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