Category Archives: Audio and Music

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MAX1703 Single-Cell Boost Converter Circuit

When you design a circuit with only a single-cell battery, you will need boost-converter to provide enough voltage for most ...

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55MHz Scope Sensitivity Amplifier

Scope sensitivity amplifier is a vital front-end signal processing for every scope instruments. The function of this circuitry is simple: ...

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Two-Band Bxandall Active Tone Control

Using active circuit for tone control means that we can provide cut and boost, maintaining overall amplifying factor of original ...

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Pulse Width (PWM) Controller Circuit

A LM3900 quad operational amplifier can be used to build a pulse width (PWM) controller. The LM3900 was chosen because ...

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Small TV Modulator Using A Motorola MC1374

How can television modulator be small and simple like this? First, it uses integrated circuit, and the second, any TV ...

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Mic Pre-Amp with Clipping

Signal clipping is usually avoided in most application, but we can find some useful examples where clipping is intentionally employed in audio processing. One example is signal limiter in SSB or radio transmission.  In radio communication, the source of modulating … Continue reading

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Tremolo Effect

Tremolo sound effect is basically an amplitude modulator.  Some people might get confused with vibrato effect, but vibrato effect is a frequency modulator, big difference. When you apply a tremolo effect on electric guitar for example, you’ll hear something similar … Continue reading

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Two Op-Amps 60 Hz Notch Filter

Notch filter is a filter that remove a certain B. Ideally a notch filter will remove only single point of frequency  component, but practically it will remove a limited range of frequency spectrum. The spectrum should have very small bandwidth … Continue reading

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Fuzz Box (Distorion Pedal) Electric Guitar Effect

The two transistors amplifies the input signal from electric guitar. The two  silicon diodes (any small signal type can be used)  clips the amplified signal to produce a  highly distorted output, after filtering the high frequency component using a 500 … Continue reading

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