How convenient! Now that we’ve isolated which pins of the switch need to be connected, we can breadboard a quick circuit with out BJT based switch controller and test it out.

1. The well-established relay-driving circuit uses an optocoupler to isolate the grounds and noise coupling between the low-voltage digital-control signal circuit (left) and the relay as load (right).

The relay itself can be triggered by a 9V battery via the transistor in the control circuit. Notice the protoboard in the image above.

Explains the principles of transistor switching circuits, highlighting their role in electronic computers. It contrasts transistors with vacuum tubes, emphasizing that transistors function as ...

Obviously, the function of muting circuits is to mute (kill) the audio signal. This can be done in a number of ways including switches, relay contacts, junction FETs, analog switches and bipolar ...

The circuit works well with loads such as relays, LEDs, and so on. However, as can be seen from Figure 3, the circuit breaker is very fast, taking less than 150 ns to respond to the overload and latch ...

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.

Question This transistor switching circuit uses an npn transistor, a voltage divider (consisting of a 5 k Ω resistor and thermistor) and a 5 V power supply.