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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TRIAC Crowbar For AC Or DC Lines

A TRIAC Crowbar circuit which works for both AC and DC voltage is shown in the schematic diagram below. This circuit provide overvoltage protection for electronic or electrical equipment against excessive supply voltage.  Crowbar circuit provide two level of protection. … Continue reading

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LM317 Low-Cost 3A Switching Regulator

A switching voltage regulator circuit shown in the schematic diagram here can be a low cost solution for your high efficiency requirement electronic circuit design. Unlike other switching regulator circuit that uses special purpose integrated circuit (IC), this circuit uses … Continue reading

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Variable Voltage Reference

A positive variable voltage reference circuit is shown in the schematic diagram below. A voltage reference can be made using a zener diode, but this method produce a fix reference value. To make a variable reference, we can amplify the … Continue reading

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Stabilized 3V Voltage Source/Reference

This LM10 circuit can be used as low voltage low current voltage source or reference. This circuit regulate the voltage from the power supply to give a very stable output. The  minimum voltage level for powering this circuit require only … Continue reading

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