Boss 400 speakers/amp circuit

A block diagram of the stereo TV decoder is presented. It illustrates the overall relationships between the separate sections of the circuit. The decoder section revolves around IC1, a standard 4.5-MHz audio demodulator. The output of IC1 is routed to...

Stereo Synthesizer

There are many ways to create a stereo effect. If you were miking a piano, a string section, or some other large sound source, you would probably stick up a pair of directional mikes and assign them left and right....

Stereo Preamplifier Circuit

A fundamental component for audio applications, this circuit functions as a general-purpose preamplifier. It is recommended to utilize two circuits for stereo configurations. This audio preamplifier circuit is designed to amplify low-level audio signals, making it suitable for a variety of...

Bootstrapped Amp Current Source

This circuit responds to the difference between Vj and V2. Rq sets the gain. Resistors XR2 and (1 - X) R2 produce the bootstrap effect. These two resistors convert the circuit's output voltage to a current. IC1 and IC2 are...

AVC Automatic Volume Control Circuit

AVC - The circuit regulates the volume line automatically, providing an output voltage of approximately 4 volts peak to peak. This voltage remains consistent. The Automatic Volume Control (AVC) circuit is designed to manage audio levels dynamically, ensuring a stable output...

Stereo headphone amplifier

The ping of the cymbals, crack of the snare drum, thonk of the bass - none of these comes through on my low-budget speakers. Sometimes they sound so fuzzy I want to hide behind the couch until it’s over. But...

Bird Feeder Monitor Circuit

The first amplifier circuit is a bird phone. In this circuit, the electret microphone (MIC1) is mounted in the neck of a large plastic funnel. The amplifier, built around an MC34119, is then placed outside of the funnel with the...

Audio

This lab will demonstrate the theory and operation of non-inverting amplifiers as well as their practical application to amplify the signal of a microphone. A non-inverting amplifier will be constructed to increase the output signal of a microphone, which will...

Bassman Modifications

Upgrading to a 3-prong AC cord is a common modification, as is the replacement of filter capacitors. Switching coupling capacitors to brands like Orange Drops or other boutique options is also popular, often enhancing the appeal in online auctions. Additional...