The red LED comes on, and NPN transistor grounds the piezo, sounding the alarm. The only way to stop it is by inserting a shorted 1/4″ phone plug conveniently attached to his key ring into a ...

This simple STM setup utilises a piezoelectric actuator constructed by deliberately cutting a piezo speaker into four quadrants. With individual drive wires attached to the four quadrants.

Sirens forward Alex Carpenter (25) shoots the puck during warm up before of a PWHL hockey game against Ottawa Charge. Noah K. Murray-NY Post Alex Carpenter had a lot on her mind as she plopped ...

Sheldon, Iowa — A twin cities area man has been arrested on a warrant on felony burglary and theft charges after an incident in 2021 in Sheldon. According to a ...