Switching high voltage power supply with power transistors generator Circuit Diagram Here's how to set up both the BJT and the MOSFET transistor as a switch so you can easily control things like motors, lamps, and more.
Electronics Tutorial about the Transistor as a Switch and using the Transistor as a Switch to operate relays, motors, lamps and other such loads When we need to switch moderate to high levels of power, one of the best methods we can use is a transistor with an open-collector output. In this setup, we connect the emitter terminal of the transistor directly to ground. Figure 7 shows the basic circuit for using a transistor to control a high-current load. You connect a DC power source to one terminal of the load, then connect the second terminal of the load to the collector of the transistor (or drain, for a MOSFET) of the transistor.
Using Transistor Switching Circuit Diagram
However, if you are delivering power to an entire circuit or a voltage-sensitive device, then you want to use a high-side switch. By the way, there are off-the-shelf components called " load switches." These ICs have a P-Channel MOSFET as the switching transistor with a built-in driver for that P-Channel.
If we want to connect a load that requires a higher operating current demand of more than 3mA, it will burn the microcontroller. Many output devices will require a transistor switching circuit to operate a high current requirement load, such as relays, solenoids, and motors. How to use it?
The Transistor as a Switch: A Practical Guide for Beginners Circuit Diagram
If this type of switching arrangement is acceptable, then the low-side switch is usually the cheapest way to achieve load switching. BJT Low-Side Switch A BJT can be used as a load switch and come in two flavors: NPN and PNP. For low-side switching, NPN transistors are used, and for high-side switching a PNP is used.
