9V DC power supply

233

04:30:36

The supply is driving a 100Ω load, represented by the resistor in parallel with the voltmeter.

DO NOT BUILD THIS CIRCUIT UNLESS YOU ARE STYROPYRO (because of the 10H inductor, and also poor design)

No load Voltage  is 9.142147V

I’ve adjusted the load resistor while measuring the current passing through it, to see how much current the supply can source, before the output voltage drops below what is acceptable as 9V (that being around 8.7V in my experiment). Based on the reading, having put the oscilloscope in XY mode, I estimated about 100 mA.

If you used a 1 mH inductor instead of the 10 H one, but keep the 100Ω load, the min-to-max range of the ripple jumps from 20 μV to about 1.17 mV

published 1 year ago

Mrogala

7 months ago

Why the two power sources in series? Why not just a single power source going to the transformer? Also curious as to why 85v? I was only wondering because nominal rms voltage in united states is 120.

Redstone_guy

7 months ago

The nominal rms of the sources is 120V in this circuit. I chose two sources because I wanted the reference ground to not be directly connected to live or neutral

Redstone_guy

6 months ago

Also, EveryCircuit uses peak voltage for its AC sources. If you use a voltmeter to measure the input voltage for the step-down transformer, it comes out to a peak of 170V, and and RMS of 120V

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