Metal Detector circuit


Posted on Sep 10, 2012

The circuit described here is that of a metal detector. The opera- tion of the circuit is based on superheterodyning principle which is commonly used in superhet receivers. The circuit utilises two RF oscillators. The frequencies of both oscillators are fixed at 5.5 MHz. The first RF oscillator comprises transistor T1 (BF 494) and a 5.5MHz ceramic filter commonly used in TV sound-IF section.


Metal Detector circuit
Click here to download the full size of the above Circuit.

The frequencies of both oscillators are fixed at 5.5 MHz. The first RF oscillator comprises transistor T1 (BF 494) and a 5.5MHz ceramic filter commonly used in TV sound-IF section. The second oscillator is a Colpitts oscillator realised with the h




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Two-wire Lamp Flasher
Solar Charge Controller connection with solar panel
Infrared Cordless Headphone Amplifier
10-Band Graphic Equalizer
car burglar alarm timer
LM1881 LM1881 Video Sync Separator
Three-phase controlled rectifier circuit



Top