All Questions
10
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What result does digital multimeter show when measuring filtered AC V? Is it Vavg or Vrms of the ripple voltage? What's the formula to calculate? [closed]
Can somebody tell me what result does multimeter show when measuring filtered AC V? Is it V avg or V rms of the voltage ripple? And what's the formulas to calculate this?
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0
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2
answers
61
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Why do I get a different value for DC output?
I am given the circuit shown below, a full wave rectifier with a filter.
To find the DC output on a full wave rectifier with a filter, I was given the formula:
$$V_{dc}(out) = \frac{V_{M}}{1+\frac{1}{...
- 97
12
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6
answers
5k
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Ripple voltage filtering capacitor
I'm an self-taught high schooler who's trying to understand how filtering capacitors work. I've searched and read multiple websites trying to understand how filtering works. At the point where I am, I'...
- 309
0
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1
answer
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Flyback 120-240VAC to 3.3VDC ripple and simulation
I'm working on a project requiring a 3.3VDC and eventually a 12VDC. The input voltage could be either 120VAC or 240VAC 60Hz.
I've found and replicated the design PMP10143 proposed by Texas Instrument ...
- 243
1
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1
answer
70
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How to avoid AC in cheap DC charger
I bought a cheap DC charger a couple of days back and I have been using it to charge my headphones and other small electronics.
I recently noticed that there is small amount of AC, less than 1V, ...
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3
answers
1k
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Choosing capacitance for recifier
So I'm trying to use a couple of rectifiers. Specifically, the "NTE5326" and the "36MB120A."
I've tried following videos on how to calculate for a smoothing-capacitor but to no avail.
If you use ...
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-2
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3
answers
2k
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What is generic formula for min and max levels of rectified AC voltage?
For example, if i have 1 phase AC voltage with 1 volt peak level and rectify it., i would get some pulsating voltage V = abs(sin(t+0*pi)). Its minimum is 0 volts ...
user197437
0
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2
answers
357
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Full Wave Rectifier Ripple Problem
I have made a full wave rectifier circuit to obtain 5VDC, 9VDC and -9VDC. To prevent the ripple, i have selected C1 and C2 as 4uF which were shown below. I will use a 12V, 6W transformer to get AC ...
- 363
0
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1
answer
236
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Average of AC signal measured with oscilloscope
I'm wondering why the oscilloscope displays that average rectifier ripple voltage value measured in AC mode is higher than zero. Moreover, the minimum value happens also to be higher than zero. ...
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0
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5
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2k
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What is the problem with charging a (lead-acid) car battery with AC power?
The closest thread I've found (which didn't show up in the automated suggestions) was What happens if an AC voltage is applied to a battery?. Unfortunately, I felt like the answers were more aimed at ...
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