speciell thx förmin referens:http://forum.Arduino.cc/index.php?topic=164112.0 https://blog.adafruit.com/2013/05/02/ardutester-a... http://forum.Arduino.cc/index.php?topic=164112.0 http://nicuflorica.blogspot.co.ID/2015/04/ardutes...Frot länken ovan j...