[RESOLVED] Re: EPROM baking
bill.gunshannon at hotmail.com
Mon Feb 5 14:00:28 CST 2018
My EPROM Programmers all have a connection foir external power
specifically because sometimes USB can't provide the needed current.
On 02/05/2018 02:06 PM, Chuck Guzis via cctalk wrote:
> On 02/05/2018 10:20 AM, Mark G Thomas via cctalk wrote:
>> 2) Many of the chips were failing to program because my Batronix
>> programmer apparently requires more current than my USB port provides.
>> This surprised me because I have been programming chips for years
>> using this programmer on this computer port successfully, and this
>> is the first I have had the problem. Using a Anker powered USB hub solved
>> things. My Batronix programmer even arrived with a cheap powered hub
>> when I ordered it, but I never used it because it was shipped with an
>> incompatible wall wart, but looking at it in the box gave me the idea
>> that this might be the issue.
> You should be aware that many "thin" Far East USB cables will not pass
> the full USB 1.5A current without substantial voltage drop. I recently
> ran into this with a new LG portable DVD drive. It refused to operate,
> even though I'd just taken it out of the box. I replaced the "thin"
> USB cable with several other "thin" ones that I had with the same
> result. Finally, in desperation, I located a "thick" USB cable, plugged
> the drive in, and discovered that it worked just fine.
> Moral: There's a lot of garbage out there.
> Rant: The whole scheme of supplying anything but low-current using USB
> is a terrible idea. I have a similar gripe with barrel connectors,
> which don't seem to enforce any standard at all regarding polarity or AC
> vs. DC.
> For my own projects I've taken to using mini XLR connectors. Perhaps not
> optimal, but they're rugged enough.
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