±5-V Voltage Converter Schematic Circuit Diagram

Asymmetrical ±5 V power supply is often needed for small, battery-operated operational amplifier projects and analog circuits. An IC that can easily be used for this purpose is the National Semiconductor LM 2685. It contains a switched capacitor voltage doubler followed by a 5-V regulator. A voltage inverter integrated into the same IC, which also[…]

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Compact Switching Step-Down Converter Schematic Circuit Diagram

Switch-mode power supplies are used in electronic circuits to increase (step up) or reduce (step-down) voltage levels in the most efficient manner possible. Compared to linear voltage regulators, switch-mode supplies convert relatively little energy into heat. Their efficiency is thus high. This is a major advantage with compact power supplies in particular since it sometimes[…]

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Small power converter

The converter enables an existing positive supply voltage to be raised, to be lowered, or to be changed into negative potential. The new voltage is electrically isolated from source by a DIY transformer wound on a G2-3FT12 toroid. The primary winding consists of 30 turns. The number of secondary turns, n, is calculated from n= […]

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Virtual ground

Virtual ground: Often only a single power supply is available for an opamp circuit. Since such circuits normally require a double supply, this means that in some way the available supply has to be converted. This is normally done by a potential divider and capacitor across the single supply. sometimes followed by an ancillary opamp.[…]

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