High Voltage Emergency Mains Cut-OFF Circuit

In this post we learn how to make a simple high voltage emergency mains cut-off circuit for intentionally blowing a fuse during a catastrophic high voltage tendency, making sure that the attached fuse blows first rather than damaging the valuable appliances If the voltage of the mains supply of a computer goes up too much, […]

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Simple Dual Power Supply Circuit Without Center Tap

The article explains how to make a simple dual power supply circuit without using a center tap transformer rather any ordinary two wire transformer. This circuit is of interest not merely  because it uses a bell transformer  with a single secondary winding to  provide symmetrical voltages for  low-current applications but also  because the final output […]

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Make Stabilized Zener Diode Using Transistor

The article states how to make a variable stabilized zener diode circuit using transistors, whose voltage is variable, and the zener voltage can be adjusted as per preference. As anyone would understand the voltage drop across a zener diode is reliant on the current getting through the diode. Consequently, based on the sort and power […]

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110V, 220V Voltage Regulator Circuit

The discussed 110V, 220V voltage regulator circuit can be used for controlling or adjusting all high voltage level inputs such as 110V or 220V simply by altering a couple of resistor values. Here R6, and R7 can be effectively tweaked for getting any desired voltage output conversion from zero to 220V or even higher, with respect […]

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Wireless TV Sound Transmitter Circuit

The post explains how to make a simple RF device which can be used as a wireless TV sound transmitter circuit using a few in expensive electronic parts Hear wirelessly to the audio of your television program on a regular FM radio, or on a Walk-man unit. Anyone can make use of headphones and in […]

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Simple Electronic Gong Circuit

The discussed electronic gong circuit initiates a couple of solenoids in sequence to affect two chimes or gongs one while your doorbell is pushed. another whenever it is released. Any time pushhutton S1 the front doorbell is first pushed C2 immediately charges. This stops switch rebound. that might result in solenoid L2 to activate ahead […]

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Making Delay Timers using NOT gates IC 4049

The post explains how accurate delay timers using NOT gates can be built easily with the help of ICs such as IC 4049 and generate reproducible delay features from these configurations. There are several situations when a switching delay is necessary. One of the ways of accomplishing this is to utilize an RC network and […]

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Thermal Indicator Circuit for Heatsinks

The post details how to build a simple 3 LED thermal indicator circuit for heatsinks and other similar applications to quickly understand the level of heat on the selected surface through a sequential 3 LED panel. The temperature of a heatsink can be measured with a wet finger: if it sizzles, the temperature is too […]

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Doorbell With Memory Circuit

The post explains how to enahnce your doorbell with a circuit which would facilitate a doorbell with memory circuit and allow the user to know through an illuminated LED if somebody has pressed the doorbell button while he was out and unavailable at home. On situation it could be helpful to understand when a guest has […]

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