Temperature Control of Peltier Element #7

Determining approximate nature of relation between the pulse width and current through peltier by the filter

Now that we were able to obtain a PWM at 54 KHz frequency, we tested practically if the filter works and if the current magnitude changes with change in the duty cycle!

So we tested the circuit for different PWM values and measured the magnitude of current that flows through peltier for that value.

Following is the plot we got for PWM Duty Cycle vs Current.

PWMvsCurrent

This plot indicates that we were successful in changing the current magnitude through Peltier using PWM signals from Arduino!

 

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