The crystal in not polorized, so it does not matter, and the caps can be between 10 & 30 pF - 22pF is widely available.I see no need for the inductor on the power feed.
Glad to see you are not attempting to put a linear regulator on the board like the original Mega 2560. If - for whatever reason - you needed a step-down regulator, the proper approach is to mount a pre-made switchmode regulator module as a "daughterboard".
I actually need 3.3 volts for an ESP-01 module. Do you have the opportunity to explain what I should do / use.
Hi,Can you please tell us your electronics, programming, arduino, hardware experience?Do you have the tools to solder the SMD TQFP IC?Have you developed a working prototype for proof of concept?Thanks.. Tom..
The advice depends on what you are intending to use the ATmega2560 for, and you have not said. Do you need a 5V version for instance ?I have just submitted a ATmega2560 base PCB for manufacture and its a 3.3V version, I have no use at all for a 5V version and I cannot rememember the last time I needed to use a 5V logic only device.