Hi all. I have a custom board that I'm putting together to allow me to use and attiny85 chips and selectable speed ( 16 & 20 Mhz ). From the schematics ( UNO ) I notice the atmegaXX controlling the USB also controls the TX/RX leds. Is there a valid way to add these without messing up serial transm…

RX/TX leds on custom board.

system August 29, 2012, 6:16am 2

Just connect 1 LED and a resistor to the Rx line and 1 LED and resistor to the Tx line.

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