Similar circuits can be constructed ... PNP transistors and n-channel transistors function similarly to “signal turns switch on” relays and tubes; likewise NPN transistors and p-channel ...

This Design Idea is inspired by Vladimir Oleynik’s “Schmitt trigger provides toggle function ... relays and passive components. A further challenge is to design these circuits such that they could ...

Impulse relay turns on with an electrical impulse at the control input and turns off again with another impulse.

This AC power switch ... circuit senses the presence of AC current in one outlet of a multi-outlet power strip and switches power to the remaining outlet(s). It utilizes a current transformer, single ...

Electroswitch control switch relays combine the function of a control switch with a remote-controlled solenoid allowing one device to do both the manual and supervisory control function in the control ...

In the days before semiconductor diodes, transistors ... functions as a radio frequency detector. Prior to the coherer becoming conductive, the circuit path that includes the coherer and the ...

A ULN2803 Darlington transistor ... relay coil, respectively. The problem begins when we independently switch off the digital-circuitry power supply before the relay-coil supply. In the circuit ...

Modern relay technology ... consumption allows the switch to be operated directly by the microcontroller without the assistance of a transistor amplifier circuit. As long as circuit design has ...

This way when the radio's mode was switched on, the remote power wire would also switch on, powering the relay's coil, closing the circuit and ... to the Base on an NPN transistor.