Designed in KiCad, FTDI breakout board. USB to UART

 FTDI- USB to UART

Designed in KiCad, FTDI breakout board.
USB to UART.

I've compromised in usb differential pairs, it was very difficult to route it keeping other traces shorter, hence instead of differential pair routing, I've route one after one. (I think, the board would need little optimisation)
However, this should NOT make difference in this application.

[In case of high speed PCBs like Ethernet, HDMI, LVDS, RF, etc. there would be significant difference.]

My Learning
1) The rise time decides whether systems are high speed or low signals and NOT the frequency.
2) If you have no FTDI breakout board to program your uC (say Atmel chips), don't worry!!! Using arduino uno board you can do it.
3) The teardrop trace is good for high speed signals and the trace should be from the centre of the pads.
4) The metal connection at the surface of the multi-layer board reduce edge-fired emission, as such system creates fringing fields on outer edges.







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