1
I have an ~10-year-old hub (Surecom EtherPerfect 505ST if anyone's interested) that says "DC 7.5V" below its power connector. Unfortunately, I can't find the adapter, but I do find one that fits but outputs 12V. My question is: is a modern computer peripheral device that takes an adapter likely to be able to safely regulate down from 12Vdc to 7.5Vdc? Since it's an old bit of hardware I'm not terribly worried about losing it forever, but I have to weigh the risk of damaging it against the likelihood of success if I keep looking for the proper adapter.
(Or maybe I have found the proper adapter and the one that came w/the device supplies more than 7.5V)
This a similar question for PCI cards (5Volts to 3.3Volts): http://superuser.com/questions/839893/i-have-a-3-3volt-pci-ethernet-card-working-on-a-5volt-pci-slot-how-is-it-possib . One of the conclusion (until now) that makes some sense: «[...] the motherboard is properly throttling down the voltage on that slot to 3.3 Volts».
– Sopalajo de Arrierez – 2014-12-13T16:46:02.517@Ramhound I'm pretty sure than a 12V adapter is guaranteed to deliver 12V as long as the current requirements are met. – PenguinLust – 2014-12-13T16:53:04.410
@SopalajodeArrierez Unfortunately, a motherboard is very different from a peripheral device and 5V to 3.3V is much less than 12V to 7.5V. The percent change (approximately -35%) is nearly the same, though. I'm not sure which metric is more telling – PenguinLust – 2014-12-13T16:56:03.083