Great resource for getting a step further,
Verifizierter Kauf(Was ist das?)
Rezension bezieht sich auf: Programming Arduino Next Steps: Going Further with Sketches (Tab) (Kindle Edition)
I was really stuck using Timer 1 on Arduino Uno for precise pulse duration measurement. This book not only helped me out regarding the timer, but was inspiring for future projects too. So far, the most useful book on Arduino programming I ran across. Thums up!