Thingiverse
Electromagnetic Swing
by mattosx1984
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An automatic electromagnetic swing — it keeps swinging using the magnetic interaction between a coil and a permanent magnet. When the swing reaches the bottom of the arc it breaks an infrared beam that activates the coil which gives the swing a little kick upward.
Construction
The construction is fairly straight forward. The pieces can press fit together, but a tiny amount of glue wouldn't hurt. The coil should be around 8Ω which depending on the gauge wire could be a hundred or more turns.
Two versions can be made: A simple version that only needs a battery and momentary switch connected to the coil or an automated version. Two 3 mm holes are in the vertical slots can accommodate the infrared sensor and emitter.
Simple Operation
The simplest and most straight forward method is to use a battery and momentary push button connected to the coil. This is almost a test of human reaction ability as the button must be pressed exactly as the swing reaches the bottom of the arc.
Construction
The construction is fairly straight forward. The pieces can press fit together, but a tiny amount of glue wouldn't hurt. The coil should be around 8Ω which depending on the gauge wire could be a hundred or more turns.
Two versions can be made: A simple version that only needs a battery and momentary switch connected to the coil or an automated version. Two 3 mm holes are in the vertical slots can accommodate the infrared sensor and emitter.
Simple Operation
The simplest and most straight forward method is to use a battery and momentary push button connected to the coil. This is almost a test of human reaction ability as the button must be pressed exactly as the swing reaches the bottom of the arc.
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