I'm building a simple demonstration toy, that shows a bee's wing in flight. It has a very fast moving part. In its most basic description it is nothing more than a pendulum which needs to rapidly cycle back and forth in about a 60 degree arc. (up to 150 beats per second). I've tried a purely mechanical solution but it would not hold up to the stresses at the connection points. A simpler solution is to eliminate the cam operation and have the pendulum with only one pivot point about 1/3rd the way up the shaft. The base of the pendulum would have a small metal piece that would be the driver for the pulse magnetic osillators at each end of the base arc swing. Unfortunately, I have no electronics experience and cannot even grasp the circuits and pulse devices needed. For most of you guys it is a simple matter of adding a 555 timer circuit, a capacitor, resistor and other techno-bits. I need help in figuring out how to get it to pulse, what to use to pulse the base of the pendulum and a simple circuit design. Any help would be greatly appreciated. I can see in this picture that at the base of this pendulum device there is some kind of magnetic motor which causes the pendulum to cycle back and forth very fast. I've got more weight, but the idea is similar. http://img.photobucket.com/albums/v222/JTRed_Dog/led_swing_clock_scanned_display.jpg"