| Electronics > Projects, Designs, and Technical Stuff |
| Good cheap way to get rock solid 12V DC output? |
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| spec:
--- Quote from: Richard Crowley on November 27, 2018, 06:23:55 pm ---We are all just wasting our time shooting in the dark. @SpannersToSparks has not (can not?, will not?) reveal what his mystery load is. So we can posit guesses forever and never get anywhere. :horse: If that cryptic (and useless) "requirement" is all that the vendor will issue, then I don't see how we can help? --- End quote --- Yes, we could use more information, but I suggest that there is sufficient information to propose an approach. The only thing I can see that is missing is the current consumption. Specifically, what do you see is missing? |
| Zero999:
--- Quote from: spec on November 27, 2018, 06:32:48 pm --- --- Quote from: Kalvin on November 27, 2018, 06:15:45 pm ---Maybe the solution calls for a solid state power supply. >:D --- End quote --- That is correct and what the OP suggested in his opening post. Except he was considering using a switch mode PSU which would require extensive filtering to subdue the switching transients. I am therefore hinting at a linear power supply, say of 10A peak capacity feeding high value electrolytic capacitors to supply the large gulps of current, like a car battery. But also to bypass the electrolytic capacitors with high frequency low ESR capacitors to provide a low impedance and high current capacity across the frequency spectrum. That way you would have better current capacity than a battery, in the sense of this application, with the absolute voltage stabilization of a solid state regulated supply. The techniques for doing this are not difficult. One essential requirement is to use hefty conductors and star point wiring- all pretty standard stuff. --- End quote --- I agree that capacitors are good for reducing the AC impedance of a battery, but don't think a regulator is required, as the voltage range of the equipment is so wide. If noise is the problem, then you can't beat batteries. Even adding a linear regulator to the battery could increase the noise, so there's no reason to have one. |
| schmitt trigger:
Rock Solid is actually a darned good name for, what else? A Classic-Rock cover group. |
| In Vacuo Veritas:
--- Quote from: schmitt trigger on November 27, 2018, 07:15:36 pm ---Rock Solid is actually a darned good name for, what else? A Classic-Rock cover group. --- End quote --- I think you mean https://en.wikipedia.org/wiki/Rocksteady |
| langwadt:
--- Quote from: spec on November 27, 2018, 06:32:48 pm --- --- Quote from: Kalvin on November 27, 2018, 06:15:45 pm ---Maybe the solution calls for a solid state power supply. >:D --- End quote --- That is correct and what the OP suggested in his opening post. Except he was considering using a switch mode PSU which would require extensive filtering to subdue the switching transients. I am therefore hinting at a linear power supply, say of 10A peak capacity feeding high value electrolytic capacitors to supply the large gulps of current, like a car battery. But also to bypass the electrolytic capacitors with high frequency low ESR capacitors to provide a low impedance and high current capacity across the frequency spectrum. That way you would have better current capacity than a battery, in the sense of this application, with the absolute voltage stabilization of a solid state regulated supply. The techniques for doing this are not difficult. One essential requirement is to use hefty conductors and star point wiring- all pretty standard stuff. --- End quote --- The op says it is an SoC current running from a power brick and with the wide voltage spec it almost certainly has switching regulators. Building something to power it that would make an audiophoole think it might be too much is taking overkill to the extreme |
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