Colleagues, Does anyone know how to detect a 3nA current? I need to design a circuit that would detect a 3nA current through a slice of tissue. The frequency...
Hallo Nick Many years ago I was developing in this area. We built logarithmic current-voltage convertors to measure currents of some 10 pA. I believe you are...
The second articel describing the reduction of input offset voltage and its drift was 19 MB after scanning the four pages. If you are interested please send me...
Hello Claus! Please send me a copy of the article also - if it's no problem for you. Will it help to scale down the scanned images by a few percent to get the...
Hello Marcus Due to the reduced contrast of the old print-out I scanned with 300 dpi. 100 dpi was to less. I can make another trail with 200 dpi. Otherwise I...
Colleagues, Unfortunately, we've just got our first spam message in this group. Job postings are spam. Rare exceptions can be arranged in advance for active...
Hi I want to measure the pressure of the water flow in the pipe .I want to use from Strain Gauge to measure the pressure.I cant drill the pipe .I must to stick...
How accurate do you need to be? If you just want to know if the pipe is pressurized or not this might work. Maybe even a high/medium/low indication. But if...
It must be work.and Its accuracy is high.the pipe is made of plastic. I want to measure the pressure of water. and the water moves across the pipe with 5bar...
So, it's a leak detector. That puts things into a different perspective. However, here are some further questions? - What's the diameter of the pipe and how...
I have a project that I want to begin working on, but dont know where to start. My idea is to construct a device that reacts to an identified object whenever...
You could solve the problem with a beacon. You are wearing the beacon and the pants have the receivers for the beacon. Your beacon can either transmit...
Check out this page: http://www.omega.com/techref/pdf/Positioning_Strain_Gages.pdf Also Omega sells about everything else you will need, including books. ...
How about an RFID tag? You just need to add a signal strength indication to tell roughly how close you are. That shouldn't be too hard to add to a commercial...
Thanks for your response. Just this morning, I started researching the use of the RFID tag & reader. But, I think I will need to simply the function of the...
Thank you for responding to my inquiry. Your input helped place my research on the right path. Thanks again. ... would ... of ... in ... almost ... pairs ... ...
Hi Nick the diameter of pipe is 7mm .and water flow in the pipe with very high tensity. 1% to 10%=value of water leakage detection of total water and the pipe...
Hamed, Sorry, if the following is obvious. You can take a completely different approach to the leak detection. Instead of sensing the conditions inside the...
Be aware of one caveat of the RFID. If you choose an RFID with 100-150kHz or 13.5MHz frequency, you will be forced to use some sort of a loop antenna. The...
As I mention before,the pipe is long. I think that detecting the leakage from outside the pipe is hard.for example if I use the moisture sensor for detect...
... Isn't 1%-to-10% a _very_ large leak? Why must that be quickly identified when 0.5% (still very large) presumably needs no attention? I don't believe that...
The pressure drop in a pipe is calculable (it has been tabulated too). One could measure the pressure and velocity of the water in the beginning of the pipe....
Tell us more about your application. 1) Can you increase the power of the transmitter? 2) Can you increase the gain of the amplifier following the photodiode? ...
actully i m usin the (photo diode) sensors to detect the obstacle placed abt 10 cm frm my robot......& i want to use photo diode pair for this purpose......
So what is the source of the IR? Is the obstacle glowing? Does the obstacle block some distant IR source? Or is the robot projecting IR and the obstacle...
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