This circuit is to provide power supply for 1A 5V digital gadgets like gadgets including LCD, Microcontroller, or any gadgets or components that need neat and filtered 5V.The microconroller based project for automobiles mainly having problems with power supply line, the car, motorbike or any automobile power supply includes starter motors, Horns, relays and so many voltage surging elements, the motors and relays may cause high backward spikes that may cause reverse polarity in line for few micro seconds. in other hand horn and again starting motor may cause sudden null voltage effects. But microcontroller needs pure uninterrupted power supplay.
The LM7805 is the hero of low cost voltage regulator as you are always use, But only 7805 didnt work for Automobile electronics it needs filter of-course. So here we are.
Circuit Schematic
Components:
- FB:ferrite bead - Normal (see picture).
Ferrite Bead - D1:1N4007.
- D2: MUR802 (super fast rectifier) (change in schematic).
- L1: 100mH 1.5W or 2W.
- C1,C2: 1000uF 25V.
- C3,C4: 0.1uF (Tantalum).
- IC1: LM7805 (change in schematic but same package in PCB).
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