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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Voltage Converter -48V to 5V(0.5A) for Telecom System

The IC is allowed to be biased at a -50 V rail with a shunt zener by the small current consumption of a MAX641 so that the IC can convert -50 to 5 V. In telecom systems, this is a … Continue reading

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Low-Voltage 1.5V Battery to +5 V DC-DC Converter

Using this circuit a low voltage battery can be increased to 5V. The need of input voltage of this circuit is only 1.5V and the output voltage is 5V at 40mA. Using 2.4V input, this circuit can supply 180mA at … Continue reading

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Basic Thyristor Switch

The silicon controlled rectifier (S.C.R.) is called as the thyristor. It is like a diode, when the cathode is negative with respect to the anode, the current flowing from cathode to anode. But, the difference of thyristor and diode is … Continue reading

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Crowbar Power Supply Overvoltage Fault Protector

This is a The Crowbar circuit. This circuit is used to prevent the load from damaging. This circuit utilize a zener diode. The regulator steps down the 12V input to 5V. The load will damage when the regulator is fail … Continue reading

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