| General > General Technical Chat |
| Rant. DC Barrel Jack sizes. |
| << < (3/5) > >> |
| vk6zgo:
My old Yaesu FT290R 2.5 watt 2m Ham radio used centre negative. It was, in theory, a battery portable, but many were used at home, operated from a 13.8v DC supply, or mobile, operated from the car DC.(In my case from the "cigarette lighter" socket). In the former case, all was well, but in the latter, if the "barrel" end of the lead was dropped on any exposed metalwork, there was a large "zap" & a blown fuse! :o |
| Kjelt:
Can't we just put a few schotkey diodes in our products so it does not matter what polarity the connector is. BTW I hate those DC barrel jacks, they have no strain relief and there are too many different sizes. |
| tszaboo:
Thats EZ. I dont design products with DC barrel jack, and I loathe DC barrel jack. |
| tooki:
--- Quote from: Kjelt on February 10, 2020, 11:29:33 am ---Can't we just put a few schotkey diodes in our products so it does not matter what polarity the connector is. BTW I hate those DC barrel jacks, they have no strain relief and there are too many different sizes. --- End quote --- It makes sense for there to be different sizes, when those sizes encode they voltage, as is the case with the EIAJ system. (I have thought about diodes, too. I first thought about it when I was a kid and first learned about bridge rectifiers. But I hadn’t yet learned about diode drops!) Strain relief is up to the implementation, just like with nearly any connector type. Maybe you guys have had way more trouble with these thing than I have, over the years. I haven’t found them to be especially problematic. (My main objection to them is simply that I wish more products didn’t need them at all, insofar as I’d rather have built-in power supplies with IEC or C8 cords instead of wall warts.) Besides, USB (especially micro-B) has displaced DC barrel jacks in a HUGE percentage of gadgets already, even things not even distantly computer related, and USB-C is enabling that for even more kinds of products. So whining about DC barrel jacks is kinda like whining about how manual typewriters would jam — not untrue, but of dwindling relevance. |
| exe:
Huh, power socket problems... On my old laptop (asus ux32vd) I had to replace power port every year or more often. They are so unreliable... At the end, the power plug worn out, and I wasn't able to find any good replacement (tried three different types). About a year ago I just soldered the power cable directly, zero issues since then. USB-C looked like an interesting common denominator to all power port problems, but sockets have questionable reliability (talking about macbook pro, both ports on which got worn out in two years). No surprise vendors want to install a temperature sensor in them. |
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