AF/RF Signal Detector Circuit Using TDA2822 IC

Here’s a design circuit for AF/RF Signal Detector Circuit Diagram. This circuit based on the TDA2822 IC. This is the figure of the circuit;

 

 

This circuit has features: very neat and easy to make, the loudspeaker is in use 4 ohm & 500mW.used to detect the signal does not AF / RF,  cheaper cost, low power stereo amplifier in 8-pin mini-DIP IC, output power up to 250 MW. Component: Switch, Capacitor, Resistor, Transistor, Speaker, Diode. [Circuit diagram source; circuitdiagram-schematic.com]