The following post discusses a simple hum filter circuit which can be installed between an audio input source and a power amplifier, so that any possible mains hum frequency within the audio signal is blocked and only the clean audio frequency is allowed to go through. Introduction As the name suggests, hum noise is in […]
Audio and Amplifier Projects
Listen to Wildlife and Insects with this Circuit
In this post I have explained a simple circuit idea which can be used for listening to the amplified sounds of insects and bugs in gardens, trees, or any deserted, quite backyards. Listening to the noises of outdoor wildlife may be a genuine auditory delight as well as a signal of impending danger. When it […]
Parametric Equalizer Circuit
In this post we talk about a parametric equalizer circuit which can be used to enhance a music output to outstanding levels, much better than any standard graphic equalizer output. Advantages The main advantage of a parametric equalizer is that it allows you to modify the frequency and the “Q factor” across a wide range while also […]
Echo Effect Generator Circuit
In this post I have explained a circuit which can be used for transforming an ordinary music into a music with depth and echo effects. Generating an echo effect electronically involves a process in which an input signal is extended and then mixed with the original signal to create collapsing decaying effect, which ultimately results […]
Guitar Distortion Generator Preamplifier Circuit
Distortion and overdrive are types of audio signal enhancement that are employed to change the tone of amplified electric musical instruments like guitars. Typically, this is accomplished by increasing the gain of the instrument, which results in a “fuzzy,” “snarling,” or “grinding” tone. Depending on the type and degree of distortion used, the effects change […]
TV Antenna Amplifier Circuit Diagram to Boost TV Signal Reception
The following useful circuit of a TV antenna amplifier was sent to me by an avid reader of this blog Mr. Miljenko Farkas. I am extremely grateful to him for his kind contribution to this site. Here’s what he wrote in his email: Overview So this antenna amplifier is made to really enhance how well […]