h a l f b a k e r yThis would work fine, except in terms of success.
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Devices which use a reasonable amount of power like amplifiers, computers, etc. contain big, chunky transformers which could easily cope with the demands of two or three low-power (say 4, 6 or 9 V DC, at max 2A) devices which currently use their own
"wall-wart" transformer. All that would be needed
would be a few extra taps on the transformer and some sockets on the back panel. You'd then avoid the inefficiency and cost of having separate transformers for every device.
12 volt house
12_20volt_20house
I know this idea is not dissimilar to "12 volt house" but I think starting to sell devices with standard DC power outputs is easier that retrofitting 12V cabling to everyone's house. [hippo, Jul 31 2008]
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Your computer power supply already produces the requisite voltages in a fan cooled power supply. If only it had a power output setup. You could use jumpers to power the 15 peripherals that need individual warts. I think it's a good idea. |
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... turns ratio... rectification... current limiting... switch mode... proprietary connectors... |
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I'll let the electronics types fill in the gaps, lest I appear foolish. I do have my doubts about how easy this proposal would be though. |
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USB? IIRC, it's good for 100mA (or 0.5A with high power mode) at 5Vdc, +/- 5%. |
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This may be suitable for many lower-power devices. Also, connectors are low-cost, and pinout is standard (which is more than can be said of the huge variety of wallwart connectors!) Presumably adaptors can be made if required. |
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the issue here is that everyone wants to ensure the performance and durability of their product. from a warranty and service perspective it's a nightmare. |
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I actually tried powering some of my home appliances using a computer power supply recently, and found my TV, wifi router and mini-itx system used a lot more power when running from a single computer PSU than using individual power bricks. I think the PSUs I tried (three of them) are inefficent at low loads, and since you wouldn't want your computer on all the time to power your other equipment this might be a problem. A generic 12 volt transformed designed for this job might do better. |
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used to be a common item in equipment racks was a wall-wart eliminator: a 1/2U 9V power-supply with many outlets. |
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The only other thing in order is to select/agree upon a universal connector. |
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Selling power bricks seperately would probably end in something like this. |
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I find it a bit strange that power bricks aren't labelled, sometimes their is no obvious pairing between device and supply besides the connectors. I'm probably not the only one to relocate a computer and find there is more than one combination of connections that can be made and the only safe solution is to hunt through technical docs to find the rating of the device and match that with the miniature print on the supply. Given that such incidents can happen the supply rating should be shown in big letters on the front, possibly with a writable white area for you to write "Office mobile or USB hub". |
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