These things are very popular among radio amateurs because they look cool and unusual. This one is developed by Ivica Novakovic. He didn’t use any motor to move Stick of LEDs but he used spring like steel plate which allows to vibrate at high frequency. This way vibrationscreates a virtual display with resolution of 30×7 LED dots.

Because of vibration method it is not easy to determine the position of LEDs in order to synchronize displayed information. So there is a piezo element used, which detects mechanical movement and via amplification circuit it gives a synch signals which guide AT89C2051 microcontrollers in lighting LEDs. There are four buttons for time setting which also include alarm setting. When alarm is triggered, LEDs are playing effects. Program and PCB are available for download.