When you say "linearize" the voltage coming from a potentiometer do you know what type of potentiometer you have? There are 3 basic types: Linear, Audio Taper and Log Taper. The Log Taper is sometimes referred to as a "Power" Taper. So first off you should make sure you...
My two cents. Do a google search for water level measurement and you will find optical, electrical, mechanical (weighing), and pressure (pressure sensors indicate rising level).
Good luck,
Jim
p.s. Of course if you are trying to get away cheap then you will have to explain more of your...
My two cents. The ARRL site is excellent if you are a memeber and is not worth the time if you aren't. Try this site which incorporates ham radio articles as well as direction finding club information.
http://members.aol.com/homingin/
Also, "steering" a radiated signal by...
My two cents. With a double sided board a single ground plane is preferable to a split plane AS LONG AS THE high speed digital is routed away from the analog and is over contiguous copper that allows the return current to flow undisturbed back to its source (check those vias, only find one for...
You mention 5 mA as a UL limit. I assume you are referring to the UL1950 standard. Other standards have different leakage current limits, the most common being 3.5 mA for non medical devices, 300 uA for cord connected, non patient contact medical devices and 5mA for "Hard wired"...
I agree with most of the messages posted here, both pro and con. In 1978 I helped design an x-ray processor controller board using 4000 cmos as it rabn at 12V for the noise immunity. Just this year, we are replacing it with a one chip micro for cost reduction reasons, not sourcing problems...
If you do not want to design/build a lock in amplifier, then you should at least consider taking your measurements differentially such as using an instrumentation amplifier. Again, either analog devices, analogic, national semiconductor or Maxim should have one of those devices. They also...
Torque is a function of the current waveshape that is being conducted by each field winding. For example,... if the waveshape is not a square wave, the the amount of torque you will get from the motor is a percentage of the stated output. Also, if you are you using a chopper scheme to prevent...
