On Tue, 7 Feb 2017 09:44:28 -0800 (PST), "
wrote:

And the typical thermocouple puts out about 0.750 DC - or *just enough*.

Since tou mentioned thermocouples, I always wondered how they produce a
voltage. I've probably installed/replaced at least 10 of them, but never
understood how they work to create a voltage.....