Date: Sun, 27 Oct 2002 23:00:48 +0000 From: Baldur Gislason <baldur@foo.is> To: Ronald G Minnich <rminnich@lanl.gov> Cc: freebsd-hackers@freebsd.org Subject: Re: Show me the light Message-ID: <20021027230049.3BD9DAB93@tesla.foo.is> In-Reply-To: <Pine.LNX.4.33.0210271547260.30460-100000@xed.acl.lanl.gov> References: <Pine.LNX.4.33.0210271547260.30460-100000@xed.acl.lanl.gov>
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I have powered leds from the parallel port, there's about 10mA of current available on each data pin without destroying anything. so I wired 8 leds, each with a 330 ohm series resistor, no external power supply. Baldur On Sunday 27 October 2002 22:48, you wrote: > On Mon, 28 Oct 2002 .@babolo.ru wrote: > > As far as I remember, there is open collector output > > on parallel port, so your wish impossible %-) > > oops, I forgot that little deal. Yup, you need a pullup. > > you can get PP relay modules for not much. > > ron > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hackers" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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