In my new Dacia Duster is missing unfortunately an outside temperature indication. A finished thermometer with LCD did not separate from there while the contrast with sunlight usually particularly is. I had still alphanummeric LED display in red there for this project in the best way am suitable. As microcontroller i used a ATTINY 2313. The temperature sensor is a 1-Wire-digital sensor, thus the alignment of the sensor is void.
Full article: http://www.electronics-lab.com/blog/?p=21906