Recent content by dk99

I'm sorry for replying so late... the major problems involved are that the tank is pretty small... and i the content of the tank is not always water so i couldn't consider the option of using that water as a dielectric...(because the contents are different... and I'm only concerned with the...

how to measure water level in a tank?? How to measure water level in tank in the cheapest way? The first thing that came to my mind is pressure sensor... but it's ruled out because it's expensive. Can somebody suggest a cheaper mechanism? And it is preferred to have a low power mechanism...

Measuring water level in tank...?? How to measure water level in tank in the cheapest way? The first thing that came to my mind is pressure sensor... but it's ruled out because it's expensive. Can somebody suggest a cheaper mechanism? And it is preferred to have a low power mechanism...

Ya.. Atmega looks like a superior choice because it's got an inbuilt ADC and all. please suggest any tutorials for learning about microcontrollers

Which Microcontroller?? i am supposed to build a VARIABLE DIGITAL NOTCH FILTER using a microcontroller (either avr atmega-32 or 8051) for my lab project. I don't know which one to chose please help me out. And suggest any nice tutorials to learn about microcontrollers.

It is using Pocket PC.. isn't it? I think it's pretty expensive. I don't think it's really implementable in India. My friend is proposing Regular wireless sensor network. How does it sound?

Thank you all... (especially mike :P) It was helpful..

How do the domestic Energy meters communicate with the power utility centers (Using the Power Lines) ?? What kind of hardware do they use? Please help me out :)

Thanks carl.. but i don't know anything about those currents... I mean their phase relationships. Can we use something like 2 current transducers and a comparator?? Do such hardware exist?

There are two AC current carrying conductors.(both are of the same frequency) How do you compare the currents to know if they're not equal at all times...? Please Answer as soon as possible ...