Arduino, XIAO ESP32-C3, LD2410 24GHz presence sensor, Buzzer, TM1637 Unexpeced approaching behind when riding frightened me sometimes, although ready made products are in the market, I made bicycle ...

In this work, we developed a flexible and stretchable bending sensor that is made of graphene film decorated with dense pores and sealed with both polyethylene terephthalate (PET) and elastic rubber ...

Video doorbells are getting smarter all the time, with two-way talk, animal alerts and even built-in radar tracking. These are the smartest doorbell cameras of them all.