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Achieve precision temperature control


Temperature circuit diagram - Achieve precision temperature control
Temperature circuit diagram - Achieve precision temperature control
Each sample pulse turns off 5V transistor Q1, which isolates the Seebeck voltage and allows its sampling through S1 and storage capacitor C1 to hold it.
W Stephen Woodward, Chapel Hill, North CarolinaC
By periodically setting the TEC's drive to zero, a storage capacitor samples and holds the Seebeck voltage. And you can, states the author, adapt Seebeck sampling to virtually any TEC-drive topology.

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