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Hi,
Input 24 vac, throw full rectifier with 1000 UF capacitor. Achieved 7 to 30 vdc output. Used less than a 2 watt load for the test.
I have never built a circuit board before. I am focusing on the regulator. I found this schematic and built it. It works, and then I studied it. It seems...
Hello,
mister _rf’s C=( 5 x Io) / ( Vs x f) was nice but not explained, and came up with 40,000 UF.
Kral’s C = 100 / ( WRP ) (Well done) came up with 12730 UF.
I found another one
C=.01(10)/2=.05 F*1000000=50000 UF
C = (TI)/V = farads
T= time between diode conductions (in seconds)
I =...
Hi,
Understood it’s an approximation.
I am so sorry I would never want you to assume, Frequency is 50 Hz.
W = 314.2 then
C = 100 / (WRP) = 100 / (314.2*2.5*10) = 100 / 7855 = .0127307 F = 12730 UF.
Thank you :)
Note: I corrected my mistakes , sorry.
Hello,
So what did I do wrong?
W = 100 Hz = 628.31853 rads/sec
R = effective load resistance = E/I=25v/10a = 2.5 ohms
P = percentage ripple = 25v (.10) = 2.5v-(a ten percent ripple)
C = 100 / (WRP) = 100 / (628.32*2.5*2.5) = .0254647 F = 25464 UF
Hello,
In link- **broken link removed** I found “For a full-wave rectifier on 50 Hz mains, f is 100 Hz”. But in the very helpful example 50 Hz was used instead of 100Hz, why? Also, I am not clear what the 5 is in -- C = ( 5 × Io) /(Vs × f )
mister_rf
Some info here:
**broken link removed**...
Hi, I want to build a power supply @ 25v a/c in and a variable 0- 20vdc, 10a max out. So that’s the plain. After the rectifier, I want to put a capacitor to smooth out the pulse. Now my question is: Does anyone know the formula to find the UF capacitance? Plus and minus information on error...
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