Peltier output

PWM output or Linear output

I dont think many understand this.

PWM provides a low cost basic electronic solution. The controller will not heat very much but does not provide the most efficient peltier drive. The drive voltage is not reduced to a specific voltage

Linear is higher cost but has more noise 25 to 1000 KHz, however its output is a voltage and gives the most efficient peltier drive, providing the best thermal performance.

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