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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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Self Powered Compressor


The most unique feature of this dynamic compressor circuit is that it needs no power supply, looks like  as passive connector or adapter cables. The attenuation is good enough, about 20dB, works for  input range of 100mV to 10V signal … Continue reading

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LED Circuit for AC Powerline Indicator


Light Emitting Diode or LED is suitable for ON/OFF indicator since it has high durability, almost free of  maintenance. The most common usage is in low voltage application since the operating voltage is low DC. Taking the benefit of its … Continue reading

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Motor Speed Control Using PWM


Pulse width modulation or familiarly known as PWM is used to control the delivered power to load without loosing the efficiency. The speed of an electric motor is controlled by controlling the power source of the motor. The simplest method … Continue reading

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