Serial Interface

[britespaak]

Hi. I want to make the serial interface in picaxe_manual3.pdf, page 43 (the top circuit). Could someone tell me how many watts the resistors should be rated at? My options are .6 Watts and 1 Watt

 

[stjosephsopunake]

Smaller the better... There will be very litle power dissipation. Just needs to be tidy.