  A simple strobe setup with potential to study higher-order eigenmodes and
multifrequency oscillations in micromechanical resonators is described. It
requires standard equipment, commonly found in many laboratories, and it can
thus be employed for public demonstrations of mechanical resonances. Moreover,
the work presented here can be used by undergraduate students and/or teachers
to prepare practical works in laboratory courses at physics or engineering
universities. The dynamics of a micromachined cantilever is analysed as an
example. In fact, using our stroboscopic setup, the first and the second
flexural eigenmodes as well as a multifrequency oscillation composed by a
superposition of both modes have been successfully filmed with a conventional
optical microscope equipped with a digital camera.
