N Channel Mosfet Power Switch Circuit. Positive voltage is fed into the gate terminal. So this is the setup for pretty much any n channel mosfet circuit.
In the case of the n channel such as the irf630 when the gate g is greater than 5 volts the led cuts on. We will understand the operation of a mosfet as a switch by considering a simple example circuit. The schematic for the n channel mosfet circuit we will build is shown below.
In the above examples we are switching a led on off using power mosfets.
The resistor on the gate of the n channel mosfet is used to bleed off the electric charge from the gate and turn off the mosfet. For an 2n7000 mosfet 3v at the gate is more than sufficient to switch the mosfet on so that it conducts across from the drain to the source. Positive voltage is fed into the gate terminal. We will understand the operation of a mosfet as a switch by considering a simple example circuit.
