Timeline for Powering Pi and 3.5" HDD from one PSU
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 13, 2014 at 0:49 | comment | added | John La Rooy | @ElliottB, If you check the specs of the poly fuses you'll see that they can take seconds or even longer to operate. They are an inappropriate part to use for protection here. It's up to you whether you choose to or not. I'm not going to google it for you, there are plenty of places (including this site) where it has been discussed | |
| Jan 13, 2014 at 0:45 | comment | added | Elliott B | over-current protection. I've never heard of these stability problems, do you have any reference for that information? I'd love to read more about it. I do see a minor benefit to using GPIO, that is a smaller footprint by not using the micro USB connection. | |
| Jan 10, 2014 at 20:42 | comment | added | John La Rooy | @ElliottB, Protection from what? Polyfuse are too slow to protect semiconductors in most circumstances. It's hard to imagine a circumstance where it would offer real protection. All it does is add an extra impedance to the power supply that may cause instability problems | |
| Jan 10, 2014 at 12:19 | comment | added | Elliott B | Could you explain why bypassing the poly fuse is an advantage? In my understanding, the micro USB input has the most protection. | |
| Jan 10, 2014 at 12:18 | comment | added | Elliott B | You're right, I might need a larger one to handle the hard drive. My main concern is putting two devices on the same 12v output line, is that ok? | |
| Jan 10, 2014 at 4:46 | history | answered | John La Rooy | CC BY-SA 3.0 |