ph meter

Hi there! If you're interested in finding the best ph meter on the market, I'd recommend checking that link: www.directindustry.com/.../ph-meter-62046.html. It really help me chose the ideal solution...
Frequency Meter

Hi, I want to develop a frequency meter with a resolution of .01 Hz. I am using 89c51 and a 12Mhz clocker. Kindly let me know how to do it. Thanks
ENERY METER

Hi, I want to build a Energy Meter(KWH Meter) for 220V ouput. Please help me in getting started.
Temp Meter

I am working on a design using the on-chip temperature sensor: Displays the room temperature in a LCD and lights an array of six led's blinking to form a christmas tree. Need assistance in C or...
decibel meter

Hi All, Can anyone tell me how to make a noise level meter (dB meter) ?? Any help will be greatly appreciated. Regards, Rocknmoon