Here is a great collection of touch switch circuits. A touch switch is an electronic device that enables us to control a circuit by simply touching a sensor. Simple touch switch circuit with 4011 – ...

They switch on with a base voltage of around 0.6V to 0.8V. Circuit diagrams often show transistors in switching circuits. For an ideal NPN transistor, the switch-on voltage at the base is ...

This last principle is used in the sensitive switch installation you will be presented next. Photocell is placed in a bridge circuit and a comparator is used as detector bridge balanced. The ...

A transistor is a key component in ... You can see an example of a thyristor in a circuit in How a thyristor acts as a latching switch.

In theory, the hundreds of photons, controlled by the triggering photon, could fan out and switch off hundreds of other transistors in an optical circuit. With its exotic clouds of atoms and bulky ...