hi all can someone lead me to a project i need a pic based 16Fxx digital view meter that can indicate the output volume level in khz eg: 70khz ..74khz..76khz .in other word deviation or modulation meter based with pic.thanks .i cant find anyone one on the net i found one that have only volume without indication .
i mislead by kHZ terms. sorry. when search for VU meter.i found it is full wave based average power indicator.then you can use full wave rectifier ----> filter----->pic adc to measure the level.i suggest trial and error method to calibrate
You need two circuits :First to get volume changed Level measurement in volts, and then Second : get this voltage level converted into Frequency and displayed.
Is it so ?
Raza sorry for the delay yess indeed i need any based pic based modulation meter or analog one i can do it i need to monitor my modulation level meter for the transmitter maximum 76khz to not have overmodulation to calibrate the transmitter thanks all