Ok...if I was to use a 3 degree of freedom polar coordinate arm design that's attached to an additional pulley to give it more movement up and down the closet ...
Three (3) DOF polar should work, although I think it's an overkill for your application. You might get by with 1.5 DOF, if we make a gross assumption that you...
OT, but interesting, I think: We have a large six-tube wind chime whose clapper is a 6"-diameter wood disk, mounted on a thin rope that hangs in the center of...
... Probably, but I think it would be easier if you just stuffed a rag in it... A few things to consider. The amount of energy imparted by the anti-clap needs...
And of course after re-reading your post, you did say that the disc is mounted in the middle of the tube. Still, it might be a good idea to make an accurate...
Each of the tubes is a unique length for its pitch, so - as the tubes happen to be hung - the clapper's position is not centered on any of them. The tube I...
How about looking at it like those desktop devices with a row of ball bearings hung on strings. One ball swings down and stops, the energy being transferred...
... the tube hits the disk, causing the tube to stop and the energy transferring to the disk, which being wood, moves a little away and dissipates the energy...
Perhaps some high speed photography is in order to see exactly how the tube vibrates. Actually, slow speed would work as well, by looking for the portions of...
Hi, I am new to the group, hobbyist tinkerer in electronics, computers, mechanicals and other such distractions. I have a recent practical desire to build a...
I would like know how to deactivate or neutralize an RFID. I know that we can put the RFID in microwave oven, but are there other means for large quantities? ...
Here's an article about a student project on this subject called RFID-zapper. http://www.rfidjournal.com/article/view/2098/1/1 . - Nick ... other means for...
Hi Mr. Martin-- As mentioned in the article that Nick posted, these RFID tags are passive devices. So if the "fear" is of manufacturers identifying the end...
Well the paranoid could use a zapper to foil the RFID triggered landmines there has been so much discussion of. ShaerpDoug ... for the ... but I can...
Thank you very much for your information and information NICK- But I would like know for the RFID who can be decteted by satellite or aircraft how to...
Thank you for your help and information. Of course it is not to be use to shoplifter. But the rfid who can be located by satelite or by aircraft with insidide...
It's easier to just scratch or bend the RFID tag or flick them off. Carrying a zapper is too obvious. That's just the ECM blood in me... Kurt ... From:...
I think it would be nearly impossible to read an RFID tag from an airplane or satellite. They are intended for use at close ranges. Of course, with enough...
Hi Luc-- I'm kinda confused here, but that is not at all unusual these days it seems ... Your initial request was regarding RFID tags used by "commercial...
I plan to design a capacitive sensor for level measurement. I need to understand the effects of temperature on measuring performance and need to compensate the...
I have a daughter, and protection is the ultimate goal. I would like to put a sensor on her doll, small enough as a Quarter, and a transmitter, large enough as...
This sounds pretty strange to me. First of all why does the tracking device need to be so small? Supposedly this device will go in a doll. If this is true the...
Hi Bob-- Check the luggage counter in the travel section of most any mid to upscale department store. They are sold all the time to help prevent your ...
Dear all, I have a sonar with a 200 kHz transducer of Lowrance named the skimmer (Lowrance Skimmer Transducer HS-WSBL) . Now I want to convert the skimmer...
Dear Chris, I saw your message on the yahoo forum. Because I want to use the Lowrance skimmer transducer I'm searching for information aboud sonars. Do you...
Hi, I am doing similar research. I have determined that the transducer is just a piezoelectric element, so your idea of rs-232 is NOT going to work. It needs...
What parts would I need to stick a Rfid tag or sensor on a certain object. When the object goes pass a certain distance a Led light will go off. The distance...
Roger, What principle do you think these alarms use: signal attenuation or time of flight? (I've never seen such alarm.) - Nick ... upscale ... too far...
Hi, Thank you very much for your reaction. I know that the sensor doesn't work with RS232. What I want to do is to convert the sensor signals to a RS232...
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