ferrite core. Tips for a beginner radio amateur

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ferrite core. HAM Tips

If you need to break a ferrite ring, then for this you can heat the fracture points up to 100 degrees with a soldering iron and at the same time, without much effort, you can break the ring with dimensions K32x20x6 with your fingers.

But a more convenient method that you can try is to simply wrap the break points with nichrome wire and pass a current through the wire, which will heat the wire and ferrite.

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1,6 nm gears for molecular machines and nanorobots 06.05.2022

Devices are getting smaller and require tinier parts. Researchers at the University of Erlangen-Nuremberg (FAU) in Germany have made the world's smallest working gear. This chemical gear is needed for the operation of molecular machines and nanorobots. It will help create electronic components, transport drugs inside the human body, manipulate individual cells or molecules.

To this end, scientists have already developed nanoscale versions of many parts, such as engines, pistons, pumps and propellers. The FAU scientists have added the cogwheel to this list. It consists of two interconnected components, including a trypticene molecule with a propeller-like structure and a flat section of a thioindigo molecule perpendicular to it (gold plate).

Together they work like a gearbox. The pair has a gear ratio of 2:3. So when the plate rotates 180 degrees, the propeller only rotates 120 degrees. The entire device contains 71 atoms and is 1,6 nanometers long. Thus, it is the smallest working mechanism to date.

The system can be easily turned on and off with light, earning it the name of a molecular "photo device". For the first time, molecular mechanisms could be controlled directly, and not just observed passive movement.

The molecular photodevice will allow the creation of more versatile nanomechanisms and pave the way for new systems of nanoscale gears that can transmit motion over long distances, in different directions and at different speeds, just like their macroscale counterparts.

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