Chargers
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 >
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 >
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 >
Mobile Phone Travel Charger
Here is an ideal Mobile charger using 1.5 volt pen cells to charge mobile phone while traveling. It can replenish cell phone battery three or four times in places where AC power is not available. More >
Fast Charger
Here is a High current charger for Fast charging sealed lead acid batteries used in Automobiles, Inverters etc. This charger can give 5 Ampere current for quick rejuvenation of the battery. It uses an Adjustable voltage regulator so that 6 volt and 12 volt batteries can be charged. More >
Dual Power source
Here is a Dual power source for the Home Security system which has to be switched on continuously. It is a power saving circuit that uses a Solar panel for providing power during day time and a transformer power supply during night.It has a battery backup and the power to the security system is derived from the 12 Volt 4.5 Ah battery.So that even if the day light is not sufficient in clody days, the security system will work normally