in this video i will make a 5v regulator using LM317 regulator ic why I'm not using the famous 7805 ic because the can only handle 500ma but the lm317 can handle 2A this is the main resin

this charger is for emergency use you can use your 12 v battry and charge your phone with this cirkit

about LM317 regulator

The power supply received at the load end or consumer end has fluctuations in the voltage levels due to irregular loads or based condition of the local power grid. These voltage fluctuations may lead to the reduction of the lifespan of the electrical and electronic appliances of the consumer or damage to the loads. So, it is required to protect loads from over and under voltages or need to provide a constant voltage to the loads and to maintain stability in system voltage using the regulation technique. Voltage regulation can be defined as maintaining constant voltage or maintaining the voltage level of a system within acceptable limits over a wide range of load conditions and thus, voltage regulators are used for voltage regulation. For linear voltage regulation, and occasionally adjustable LM317 voltage regulator is used wherein the non-standard voltage is intended.

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