What can you do with all used Covid-19 hometests? My proposal is to turn it into a pulse motor on solar energy. In this way you make it into a memory object with a very long runtime.
This pulse motor has a simple construction. The rotor runs with magnet bearings build in the plastic Covid test strips. Below a small glassplate I glued a magnet. This keeps the rotor shaft in place. The shaft does not touch the upper bearing. As actuator I use the Hall sensor. That is also the driver for the coil. A LED shows the pulse and can be used for the adjustment. That's a pretty accurate job. I glued the sensor to the coil and moved it until I reached the optimal result. All the test strips I glued together with second glue. The solar energy is stored in a super-capacitor and can supply power to the circuit for at least a week. This without any power supply from the solar panel.
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