Convert 12V to 5V by using 7805 or using Resistor? - General Electronics - Arduino Forum

Hi Guys, This is my first time to use 7805 to convert 12V to 5V. I have a few questions hope you guys can enlighten me. 🙂 Attached is my 12V to 5V diagram. My question is: Do I need really need to add a diode 1N4007 between 12V and 7805? Is it correct to use 470uf + 0.1uf (input) and 0.1uf + 220uf (output)? (Got this values from ) Can I connect the 5V output to Nano's VIN? Understand that the 7805 got heating issue, is there anyway to reduce the heat? As i will

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