NOAA WEATHER ALERT DECODER


Posted on Feb 6, 2014

This circuit detects the 1050-Hz tone sent by the NOAA (National Oceanic and Atmospheric Adminis-tration) Weather radio stations that operate from 162. 40 to 162. 55 MHz. This tone lasts for several sec-onds. Q1 is an amplifter that feeds tone detector U1, an NE567 detects this tone and produces a low on pin 8. This is coupled to a 555 timer (U3), w


NOAA WEATHER ALERT DECODER
Click here to download the full size of the above Circuit.

hich produces a high on its pin 3, sounds BZ1, triggers SCR1, and lights the LED. S2 is used to rest the circuit.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    8 Channel PWM with AT90S1200
    700w-power-amplifier-with-2sc5200.html
    Latest Car Alarm Simulator circuit
    usb power socket with indicator
    Power Control
    Electronics - circuit relay type answer



    Top