Radio Commercial Zapper Circuit

Posted on Nov 30, 2012

The LR inputs are summed, dated and drive a comparator. The comparator senses level and generates a transition when audio inputs go above or below preset thresholds. The number of these transitions (corresponding to rapid volume changes) are integrated and feed voltage controlled amplifiers. This device actually senses dynamic range. BLOCK DIAGRAM OF THE COMMERCIAL KILLER: The envelope of the signal is used to vary the pulse rate from IC2-C.

Radio Commercial Zapper Circuit
Click here to download the full size of the above Circuit.

The pulses are integrated; the resulting signal controls the gains of a pair of VCA`s.

Leave Comment

characters left:

New Circuits



Popular Circuits

Electronic Canary
LCD to a PC Parallel Port
Music Instrument design
Telephone Scrambler Circuit
Phoenix From Start to End
Power Buzzer
555 Christmas Lights Project
Aristo Streamliner Tips
TV Decoder
Control Voltage Distributor
Solar Charger Build
PIC-based applications from Westford MicroSystems descriptions C source code and schematics