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Lab #7 – Thevenin/Norton

• Activity #1 – finding the Thevenin/Norton Equivalent for the function generator– The function generator is a voltage source that

produces an AC voltage, usually a sinusoidal voltage.

– The waveform produced repeats itself over and over again, in this case 400 times per second

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BK Function Generator

Adjust the frequency knobs to the desired frequency.

Select the range

Turn on

Choose Sine

Output terminal

Adjust outputVoltage

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Lab #7 – Thevenin/Norton

• Activity #1 – finding the Thevenin/Norton Equivalent for the function generator– The multimeter is used to measure the RMS

(root mean square) voltage (or effective DC voltage because it supplies as much power as a DC voltage source would.)

– The DMM can also measure the frequency of the source.

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Digital Multimeter (DMM)

Power switch

AC voltage AC current

Press the AC voltage button to get the RMS value of AC part of waveform.

Range is set automatically

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Digital Multimeter (DMM)

2ND FREQ

You can display the Frequency at the same time by pressing the 2ND button and then pressing the FREQ button.

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Activity #2 – Max Power

• Now that you have Rth = RN you can measure the output voltage for different loads and calculate the power delivered to each load.

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Activities #3-5 – Simulations

• Find Vth– Find open circuit voltage for

• Circuit with only independent sources

• Circuit with both independent and dependent sources

– Vth=0 for circuits with only dependent sources

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Activities #3-5 – Simulations

• Find Rth– For circuits with only independent sources

• By source removal, short circuit current or by applying a load

– For circuits with only dependent sources• Connect a test source to the output

– For circuits with both types of sources• By short circuit current, by applying a load or by

connecting a test source to the output