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This is fat
After using too many models, it is found that the most practical and simplest thing is to stick a small iron piece on the back and then rely on the small ball of magnetic force. It is convenient to take, 360 rotating and cheap.
Infrared technology is a bit LOW, now it is opened and closed with pulse trigger.
That's great
Figure 1 When operating a mobile phone, it is easy to trigger infrared sensing, right?
This design does not have flexibility. Mobile phones are too big and too small.
By clamping?
Magnetic adsorption?
Very good