# 14.6: Circuit Verification Data Sheet

- Page ID
- 26078

1. Output Voltage and LED Test: LED operational _________

Output Voltage Range of Adjustment _______ to ________

2. Adjust output to 5 VDC with a 20 ohm load resistor attached to the output.

Calculated Load Current _________ Measured Load Current _________

Calculate the power being dissipated by the 20 ohm resistor? _________

3. Calculate the expected turns ratio of the transformer from the transformer data listed on the Bill of Material. Calculate and measure \(V_{Sec}\) RMS.

Calculated n = _________ Calculated \(V_{Sec}\) RMS = __________

Measured \(V_{Pri}\) RMS = _________ Measured \(V_{Sec}\) RMS = _________

4. Calculate the expected DC Voltage (VDC) and Peak to Peak Ripple \((V_{rpp})\) out of the filter circuit using the formula: \(V_{rpp} = I_{LOAD}/f_C\) where \(f\) = frequency and \(C\) is the value of the filter capacitor. Use a load current of 70 milliamps.

Calculated VDC = __________ Calculated \(V_{rpp}\) = __________

5. Measure the DC Voltage (VDC) and Peak to Peak Ripple \((V_{rpp})\) out of the filter circuit values with the 20 ohm resistor in place:

Measured VDC = __________ Measured \(V_{rpp}\) = __________

6. Measure VDC and \(V_{rpp}\) of the output voltage of the power supply with the 20 ohm load resistor in place.

VDC of the Power Supply Output = _______

\(V_{rpp}\) of the Power Supply Output = _______