![]() ![]() ![]() To be honest, if you ready to design your own board, you shouldn't need to ask these questions. I hope everyone have knowledge share it with me because me experience in electronic circuits and PCB is poor. Q9/ if I’ll remove the USB with ATMEL or FTDI do I need to use Two crystal 16mhz in the board or one will be enough? The Freaduino use DC/DC MP2307 while the original Arduino Mega 2560 don’t have this chip Q7/why there is another LP2985-33 Linear Regulator with different size and also if I want to remove the USB do I need it or not. Q6/FDN340P Fairchild Semiconductor what is this chip and if I want to remove the USB do I need it or not. ![]() Q5/ why there is OP LMV358IDGKR and for what it use if I want to remove the USB do I need it or not. Q4/ LDO Voltage Regulators NCP1117ST50T3G is this chip use to drop the input voltage from power jack from 9v to 5v to source all the board with mega2560 chip or not. Q3/if I want to remove USB and FTDI chip from the design and programming the board via ISP pins, how many capacitor and resistor and other components from the schematic do I need to remove because I don’t need it. Q2/ how the select able switch between 5 and 3.3 v work, the mega have 3.3 v so why there is select able switch. Q1/ what’s difference between Regular Arduino MEGA 2560 and Freaduino_Mega2560 in components that’s make Freaduino_Mega2560 5V current 2A. I'm interesting in this edition of Arduino mega 2560 As we see there are many components not used in the board because the remove USB port and ATMEL chip to programming ![]()
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