I have science project that involves measuring a small torque, or twisting force.
Is there a torque sensitive resistor I can buy? Or perhaps a torque sensitive capacitor? I can integrate it into an existing circuit if I can find one.
Thanks, Dave
Wind a string around the object and connect the end to a strain gauge.
Yup, sure thing!! It's called a strain gage. Omega, among others, make them. Get some info about them at
Dave M
Never take a laxative and a sleeping pill at the same time!!
Use a Analog Meter Movement, and monitor the current required to re-center the needle. I have seen this setup used to measure sub milligram quantities
Yukio YANO
Jameco sells a resistive flex device that has a range of around 10K-40K. It's a long link, but here it is!
"Yukio YANO" wrote
needle. I have seen this setup used to measure
When I was doing postgrad physics, I used a "microbalance" that used a very similar principle. It routinely measured _microgram_ changes in mass of a gas-adsorbing sample as it was exposed to varying pressures of the gas to be adsorbed.
It is a very good method for measure miniscule mass (well, weight) changes.
May not be what the O.P. is looking for though, but I thought I'd post to recommend this method for ultra-sensitive weight-change measurements.
Martin
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