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VOX circuit schematic
VOX is a switch ordered by voice, often used at microphones instead of the classic switch button. The vox described here may be connected to almost any type of audio equipment which has an external speaker for coupling.
The threshold action is set with volume potentiometer of the audio amplifier which commands the [...]
NS741 fm stereo transmitter
NS741 is an integrated circuit, a small power fm transmitter were left and right audio signals can be modulated in FM stereo with multiplexing.
NS741 Description:
It is a small power fm transmitter that allows data transmission RDS (Radio Data System). Incorporated DSP generates stable stereo signal and attachment RDS data.
NS741 applications:
- Wireless microphone
- Cd and portable [...]
Talk Over circuit schematic
A very usefull talk over circuit which you can use in your radio stations, club or anywhere you want to speak over music without any movement of potentiometers. Just talk in your microphone and the music level will drop accordingly to your voice.
Talk-over circuit schematic:
