This circuit uses a thin piezoelectric sensor to sense the vibrations generated by knocking on a surface; eg, a door or table. Basically, it amplifies and processes the signal from the sensor and ...

Here is an Ultrasensitive Heat Sensor to monitor high temperature in Electronic devices. It can be placed inside the electronic gadget that usually generates heat during its operation. The circuit ...

Anyone with with an old, dead home security system can give their wired sensors new life—but prepare to get into the weeds to set up a Konnected system. Homeowners with old, wired alarm systems often ...