Power Supply
Power supply Circuits
Solar Charger
Here is a solar charger circuit that is used to charge Lead Acid or Ni-Cd batteries using the solar energy power. The circuit harvests solar energy to charge a 6 volt 4.5 Ah rechargeable battery for various applications. More >
Laser Communication System
This laser communication system transmits sound or music signals through a laser beam. The intensity of the laser beam changes with the amplitude of the sound signal. The variation in the intensity of the laser beam is converted into a variation in the voltage level by using a calculator’s solar panel. More >
Mobile Phone Battery Charger
Mobile phone chargers available in the market are quite expensive. The circuit presented here comes as a low-cost alternative to charge mobile telephones/battery packs with a rating of 7.2 volts, More >
AC Mains Bistable Switch
This AC mains-operated bistable switch turns on or turns off a device using a miniature neon lamp and a few discrete components. This switch can be used for control panels, appliances and lighting controls. More >
Battery Circuit for Backup/Standby Operation
The circuit was designed to create a spare and reserve power source with the use of batteries during the absence of power from the mains. More >
Single Voltage Supply with Symmetrical Output
The circuit has been made for the creation of a symmetrical voltage that would come from a single power supply. More >
Three-Phase Appliance Protector
Many of our costly appliances require three-phase AC supply for operation. Failure of any of the phases makes the appliance prone to erratic functioning and may even lead to failure. Hence it is of paramount importance to monitor the availability of the three-phase supply and switch off the appliance in the event of failure of one or two phases. More >
AUTOMATIC PHASE CHANGER
In three-phase applications, if low voltage is available in any one or two phases, and you want your equipment to work on normal voltage, this circuit will solve your problem. More >
Generator Room Light
At night when power fails, one finds it difficult to reach the generator to start it. Here is the circuit for a generator room light that automatically turns on at night, facilitating easy access to the generator. During daytime, the light remains off. More >
Inverter overload protector with delayed auto reset
The circuit presented here is an overload detector which shuts down the inverter in an overload condition. More >