Simple battery charger with indicator Circuit schematic with explanation

This is a simple 12V rechargeable circuit smart battery charger circuit. You can use it to the best car battery charger circuit battery chargers, inverter battery charger, charger, etc. automatic emergency battery indicator alarm circuit also comes with the battery charger schematic. The main advantage of this indicator is a buzzer informs us when the battery needs recharging. This circuit diagram certainly contributes to your daily life battery charging applications. 
Battery charger diagram:
battery charger with indicator Circuit schematic with explanation

Electronic components: 
-Transformer (230V or 110V to 15V 15V 
T0)-bridge rectifier (1N4007 x 4) 
-condensateur (470uF, 50V) 
- Voltage regulator IC 7815 
-12V rechargeable battery how the circuit this battery charger - The load circuit is constructed. around IC 7815 voltage regulator and two transistors BC 548 - 230V or 110V The main is the first step down using a step down transformer and then it is filtered and rectifiered. - The DC voltage is supplied voltage regulation IC 7815 ;.the output will be regulated 15V 12V rechargeable battery is connected to the output of the voltage regulator. and charge when the main power is available. - When the battery voltage falls below a particular value LED1 stops glowing and buzzer gives her indicating that the battery is discharged and must be charged.

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