Room Monitor Circuit

Posted on Dec 21, 2012

The circuit uses Ql to buffer the right-channel balance output while Q2 and Q3 form a VOX circuit. When the signal level from the microphone goes high, the output of the VOX also goes high and the multiplexer inside IC1 switches the high-gain left-channel output through to a following buffer stage.

Room Monitor Circuit
Click here to download the full size of the above Circuit.

This signal is then ac-coupled via C3 into an RF mixer stage and thence to an RF amplifier, which is tuned by C2 and L2.

Leave Comment

characters left:

New Circuits



Popular Circuits

mini projects
simple analog to digital converter
Wailing Alarm Siren
48v phantom microphone power supply
High Fidelity Valve audio Amplifier 40W