Presettable shunt regulator

Depending on their location, linear voltage regulators are arranged traditionally into two sub-groups: series and shunt (or parallel) regulators. In practical circuits, series regulators. particularly the popular integrated types in the 78xx family, are normally used since these give good regulation and allow a reasonable output current. Nevertheless, good shunt regulators are also becoming available,[…]

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Regulator Short Circuit Indicator Circuit Diagram

Why we need Short Circuit Indicator? Modern integrated voltage regulators are protected against short circuits but do not give an indication when a short circuit occurs. In the case of regulators with the fixed output (78xx), a short-circuit indicator is easily arranged by connecting an LED and series resistor across the regulator output. The LED[…]

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Fuse monitor

Fuse monitor

When an appliance ceases to —K operate, there may be various causes for this, one of which is the blowing of the mains fuse. The monitor proposed here contains an LED that lights when that is the case. It is suitable for use with fuses rated from milliamperes to amperes. As long as the fuse[…]

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