They have yet to see first voltage; except for one connected to a 9V battery to confirm hot and cold sides. The number of choices offered can be a bit confusing. Notice also that the Peltiers come in at least 2 basic types: sealed and unsealed. Sealed simply means that the "sandwich" that is the Peltier is factory sealed edge on to keep out moisture.
I'm not familiar with thermal runaway in Peltiers. I would guess that adequate heatsinks and heatsink cooling should
obviate the problem. Paul is our Peltier Guru here and probably has more info.
ADD. I've since done some googling about thermal runaway in Peltiers. This has me wondering if I should feed mine with a
Pulse Width Modulator or current limiting device??
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Re: Write up for peltier cooling an SCT
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and probably has more info.
