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The History Of A Controversial Book Of Anatomy.
Pernkopf and his Anatomie – the most beautiful and horrible anatomical work of the 20th century.
This is an article and tutorial explaining what an P-Channel MOSFET transistor is and how it works, its basics.
Source: P-Channel MOSFET Basics
This is an article and tutorial explaining what an N-Channel MOSFET transistor is and how it works, all the basics.
Source: N-Channel MOSFET Basics
Various Arduino projects that need to switch a high DC load are using MOSFET’s to do this, according to the circuit at the right (R1 is optional and may be necessary to switch off the FET if the pin goes low.
Popular MOSFET’s that are used are the IRF510 and IRF 520
Looking at those graphs one can see that at a gate to source level of 5V (Arduino levels) the IRF510 is only capable of delivering 1 Amp, whereas it is specified for 5,6 Amps continuous current. The 520 is somewhat better: at 5 V it delivers 3 Amps from its max of 9.2. This is because these FET’s are designed to pass the max current at gate voltages of around 10 Volts and that is beyond what most microcontrollers can deliver.
For the IRF522 it is even worse.
Looking at the curve, at a gate to…
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N Channel Enhancement Mode Mosfet
To download your own copy of the IRF540 datasheet pdf file, click the link below:
(Vishay branded type)
The circuit below uses a different mosfet but it illustrates the same principle: