In this article I have explained a simple high voltage meter circuit which can be used for measuring extremely high voltages in the order of many 1000s of volts. The circuit can be used to measure high voltages from CDI units, Automobile spark plugs, high voltage generators, mosquito bat circuits, fence chargers, room ionizer circuits […]
Voltage
Automatic Voltage Stabilizer Circuit for TV sets and Refrigerator
Here we will study the design of a simple automatic mains AC voltage stabilizer which can be applied for safeguarding appliances like TV and refrigerators from fluctuating voltages. A voltage stabilizer is a device which is designed to sense inappropriate voltage fluctuations in AC mains supply inputs, and correct them to produce a stabilized voltage for the […]
Mains High Low Voltage Protection Circuit with Delay Monitor
In this post I have explained an upgraded version of my previous mains 220V/120V high-low voltage cut off protection circuit which now includes a delayed restoration of power for the load with 3 LED power status indicators. The idea was requested by one of the dedicated members of this website. Circuit Objectives and Requirements Main […]
Single Phase Voltage from Three Phase Voltage Source
In this post I have explained a simple relay changeover circuit for extracting single phase AC from a three phase AC source irrespective of the condition whether all the three phases are present or not. The circuit was requested by Mr. Biannz. Technical Specifications hi sir please i need something I’ve been searching everywhere but not avail […]
High Current Voltage Doubler Circuit
In this post I have explained a voltage high current doubler circuit which will almost double the voltage that’s been applied at the input (up to 15V max), and also it becomes specifically useful since it allows higher current loads to be used at the output, in the order 10 amps. Since the voltage doubler […]
Voltage-Divider Bias in BJT Circuits – More Stability without beta Factor
Biasing the terminals of a bipolar transistor using a calculated resistive divider network for ensuring an optimal performance and switching response is called voltage divider biasing. In the previous bias designs that I have explained the bias current ICQ and voltage VCEQ were a function of the current gain (β) of the BJT. But, as we […]