Category Archives: Power Supply

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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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5V Switching Regulator, Very Simple Circuit

5v-switching-regulator

Switching Regulator for High Power Efficiency When you should regulate a high voltage to a much lower voltage, switching regulator must be the only choice. Fortunately,  a simple switcher integrated circuit chip is available, let you build a complete step-down … Continue reading

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DC to AC Inverter

dc-to-ac-inverter-12v-to-110v-220v

DC to AC inverter is used to convert DC voltage source to an AC voltage source. DC AC inverter circuit works by switching the DC voltage source to make an alternating current  that flow to a transformer. Here is an … Continue reading

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Variable Power Supply 1.2-55 Volt, Uses Switching Technology for High Efficiency

variable-switching-regulator

Designing wide range variable power supply using linear regulator is easy, but suffer terrible efficiency when it should regulate 60 Volt constant source  down to 5 Volt or lower, the efficiency would be 5/60 or 8.33% at maximum effort, really … Continue reading

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