This is a circuit which uses battery,...
S&T - Light 003
This is a circuit which uses battery, solar panel ,mains power supply as a power source. At night it uses rechargeable battery to power light and fan and in the morning solar panel energy is used to recharge the battery as well as to power the fan or light. Suppose the battery is not charged due to bad weather conditions then we can use mains supply to charge the battery.
Emergency lights do not work long enough as their batteries are not charged fully due to the power cuts. During night the situation is even worse as it becomes impossible to sleep when the fan also stops working. Here is a circuit for solar-charged emergency light that can also be used to run a small DC fan. It can help in resolving the problem of uncharged batteries by providing dual charging option. Its battery gets charged by a solar panel during the day, but when it is cloudy, or at night, it can be charged using the mains power supply.
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