Repeated or prolonged pressing of a doorbell can be disruptive, particularly in homes or offices. Visitors often press the bell multiple times in quick succession or hold it down too long, creating ...

In the classic configuration and most variants of the astable 555 multivibrator circuit, the timing characteristics are based on the charging and discharging of a capacitor. However, it can be argued ...

This project combines a sand timer with a rotating mechanism and an optical beam through the center of the timer to observe the falling sand as they create a USB Hourglass. This project combines a ...

The product marketing teams over at APC by Schneider Electric were kind enough to point out to me yesterday that THEY, too, have introduced surge protector this year that is endowed with power-saving ...