[TriEmbed] Power FETs Vol 25, Issue 27

[Grawburg]

Nice technical explanation that I will need to ruminate on, but I do understand it well enough to ask these questions:

1. If the length of wire between the Pi and the FET is much longer than a foot I'm guessing that using a driver is mandatory, especially with a FET like the one I'm using.
2. If fast response is not essential, since we're only talking about milliseconds, the driver may be unnecessary.
3. Suppose I use an  externally powered (5VDC) I/O port expander (MCP23008) between the Pi and the FET? I gain a second layer of protection between the Pi and the load and now supply the gate with 5V.  Once again, I'm making a presumption that lightning-fast response is not essential. I really do like using these I2C devices.

Brian





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