I have completed my customized
Arduino schematics using KiCad. I have been using
MCP2200 for usb-to-uart conversion. After completing it, i was having a look at
Arduino Uno Schematics available at
Arduino website. I have following questions:
Arduino uno has used resistor of 1K in between TX/RX pins of
ATMEGA8U2-MUand Atmega328. I am not quite sure why they have been used? To limit the current when Arduino TX/RX pins are used as GPIO?
I want to power my board from USB power. I am using capacitor of
10uFto remove noise. Is it a right way to do? Although, i am having a regulator
LM1117-3.3and it's output is being connected to a pin. It is there to power other off-board modules and hence, i am not using it for on-board components.
If you find any other problem with my schematics or layout, please mention them in your comments/answers.