PCB Quadrotor: Strobe Vibration Visualization
One of the challenges of making a PCB-based micro quadrotor has been vibrations in the relatively thin, flexible frame. To visualize the vibrations, I used a strobe light set to a frequency that is slightly higher or lower than the propeller RPM.
More info on quadrotor: http://scolton.blogspot.com/p/flying-things.html#4pcb
credit
Shane Coulton
