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Re: ADB port 5 volt?
- Subject: Re: ADB port 5 volt?
- From: Roger Johnstone <roger@roger.geek.nz.removethisbit>
- Date: 28 Mar 2007 09:09:36 GMT
- Newsgroups: comp.sys.apple2
- Organization: <none>
- References: <eud3qv$4k7$1@Kil-nws-1.UCIS.Dal.Ca>
- User-agent: Halime (MacOSX)/1.0rc2b
- Xref: g2news1.google.com comp.sys.apple2:24495
In <eud3qv$4k7$1@Kil-nws-1.UCIS.Dal.Ca> a2fan@nnnn.org wrote:
> For devices that use the ADB port for power, are they 5 volt? I found
> an old network adapter that says 5 volt with a tiny plug input on it
> that I thought I might try to make a cable for.
Yes, but check how much current the network adapter draws. The ADB
specification only allows for 500 miilliamps, although the only thing
really limiting it will be a fuse on the motherboard. If I recall
correctly each device was also supposed to be limited to 100 mA, but
that was probably just so that the user could always be assured that
plugging in any handful of devices would never overload the supply.
--
* Roger Johnstone, Invercargill, New Zealand -> http://roger.geek.nz
* PS/2 Mouse Adapter for vintage Apple II or Mac
* SCART RGB video cable for Apple IIGS