Author Topic: DIY Voltage Stabiliser (Read 2857 times)

ahmisuhairi · « **on:** October 28, 2007, 05:43:33 PM »

Anyone hv info/experience making 1? Knw how to put elec. cap..But dono where to put mica cap. Want to improve mid n high torque.

4700 uF x 2
2,200 uF x2
1,000 uF x4
470 uF x4
330 uF x6
220 uF x6

Wired like below diagram

something like the in the website below
http://www.prox.jpn.org/~yt27/dressup/dressup25.html

netken · « **Reply #1 on:** October 30, 2007, 02:15:18 PM »

wanna purchase V-Caps? prolly not suitable or too expensive ...

but as a power input bypass cap, i wonder how it will perform ...

built · « **Reply #2 on:** October 30, 2007, 02:56:19 PM »

you can use panasonic fc series caps. they can be easily purchased
at RS Malaysia or Farnell. the reason he is using so many capacitors
(in parallel) is to reduce the ESR.

have fun!

ahmisuhairi · « **Reply #3 on:** October 30, 2007, 04:08:15 PM »

THANKS

But now still looking for figures for mica and polyester caps to combine with them... V-cap for it? wont it be a waste, better make passive for myself...

built · « **Reply #4 on:** October 30, 2007, 05:56:23 PM »

any specific reason you are combining the mica and polyester?

calvinhpk · « **Reply #5 on:** October 30, 2007, 09:48:36 PM »

Quote from: built on October 30, 2007, 02:56:19 PM

you can use panasonic fc series caps. they can be easily purchased
at RS Malaysia or Farnell. the reason he is using so many capacitors
(in parallel) is to reduce the ESR.

have fun!

can parallel many capacitors reduce ESR??

built · « **Reply #6 on:** October 30, 2007, 10:22:28 PM »

ESR - Equivalent Series Resistance

yes.

ahmisuhairi · « **Reply #7 on:** October 30, 2007, 11:01:51 PM »

Thanks. I saw few design using mica n poly caps but they are usually used in small values, the reason using them instead e-cap maybe sifus can explain. Small value=higher frequencies, vice versa.

calvinhpk · « **Reply #8 on:** October 30, 2007, 11:56:20 PM »

Quote from: built on October 30, 2007, 10:22:28 PM

ESR - Equivalent Series Resistance

yes.

I know what is ESR, but I don't know parallel few capacitor can reduce ESR, can you explain or show me something??interesting to learn

built · « **Reply #9 on:** October 31, 2007, 06:49:50 AM »

calvin,
since you already know ESR, however for the benefit of others,
ESR is defined as...
"ESR is the sum of in-phase resistance. It includes resistance of the dielectric, plate material, electrolytic solution, and terminal leads at a particular frequency. ESR acts like a resistor in series with a capacitor (thus the name Equivalent Series Resistance). This resistor can cause circuits to fail that look just fine on paper and is often the failure mode of capacitors."

hence, when 2 "resistors" are connected in parallel, the resultant
resistance value is half. of course, when more are connected in
parallel together, the lower the resultant rsistance will be. i can
only tell this much with my limited knowledge in the subject. if you
think otherwise, please share with us.

netken · « **Reply #10 on:** October 31, 2007, 07:38:29 AM »

a.suhairi,

why dun u try and emulate the Pivot Blue design? i remember there is a diagram sketch outside the box ...

calvinhpk · « **Reply #11 on:** October 31, 2007, 09:17:03 AM »

thanks built..... :D

ahmisuhairi · « **Reply #12 on:** October 31, 2007, 01:40:30 PM »

im not an expert in electronic etc its got something to do with stabilising the voltage as the irregular voltage from the battery and spark plug will be high and low and that will create the ESR...

abel · « **Reply #13 on:** November 02, 2007, 12:00:06 PM »

where can get this kind of casing hehe nice leh

Audiophiliac · « **Reply #14 on:** November 02, 2007, 02:21:05 PM »

can take it from component crossover's casing

ahmisuhairi · « **Reply #15 on:** November 02, 2007, 03:12:15 PM »

Abel,

nice one u git there... what the caps' values?

netken · « **Reply #16 on:** November 02, 2007, 03:31:00 PM »

is it true after some day, these caps will drain the battery ??

cos when the engine is off, the caps will actually take the power from the engine ...

worse still if the life span of the cap is over ... then it will have weaker strength to store energy but keep absorbing more ....

just a thought ..