Hello @thomas.wright ,
As a follow up. It took some time, but I did develop a series of articles exploring the MOSFET. Please consider:
A microcontroller is a low-power logic device. By itself, it is generally incapable of directly driving a relay. A single N-channel MOSFET may be interposed between the microcontroller and relay to increase the available coil current and accommodate relays with higher coil voltages.
In this article, we explore a simple MOSFET-based interface allowing an Arduino Nano Every to control a 12 VDC relay. The design, as shown in Figure 1, also features the CIT J104D2C12VDC.20S relay and the DMN67D8L-7…
Guide to Selecting and Controlling a MOSFET for 3.3 VDC Logic Applications
It is common knowledge that MOSFETs provide an easy-to-use solution for controlling digital loads. In theory, a microcontroller can turn on a MOSFET by directly applying voltage to the MOSFET’s gate terminal. In practice, things are not so simple, especially if we use 3.3 VDC logic.
The MOSFET is a voltage-controlled device where the gate voltage determines the conductivity. Classic MOSFETs such as the IRF520 require a …
Sincerely,
Aaron
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