/diy/ - Do It Yourself

>>2414910
My fear is more that an array of thermopiles would each have different enough temperatures on their other side, since there's enough reason to drive them individually in the first place. If you could assume the background temperature to be equal for all of them, then you could just measure the front temperature only once too and assume it will be the same for all. If any thermopile has to work particularly harder or less-hard then that means it's going to pump a different amount of heat from the others, hence changing the temperature on its back side. Only if the back side is all really well thermally connected together would that kind of assumption stand. Which could be the case, I think the required condition is that the thermopile-to-thermopile thermal resistance would have to be significantly less than the thermopile-to-ambient thermal resistance.

Actually now that I think about it it's not that difficult to multiplex, pic related. Much worse if you need to H-bridge them though.