From owner-freebsd-hackers Sun Oct 27 15: 1: 3 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 8EAFD37B401 for ; Sun, 27 Oct 2002 15:01:02 -0800 (PST) Received: from tesla.foo.is (tesla.reverse-bias.org [217.151.166.96]) by mx1.FreeBSD.org (Postfix) with ESMTP id 78F6E43E3B for ; Sun, 27 Oct 2002 15:01:01 -0800 (PST) (envelope-from baldur@foo.is) Received: from there (eniac.foo.is [192.168.1.25]) by tesla.foo.is (Postfix) with SMTP id 3BD9DAB93; Sun, 27 Oct 2002 23:00:49 +0000 (GMT) Content-Type: text/plain; charset="iso-8859-1" From: Baldur Gislason To: Ronald G Minnich Subject: Re: Show me the light Date: Sun, 27 Oct 2002 23:00:48 +0000 X-Mailer: KMail [version 1.3.2] References: In-Reply-To: Cc: freebsd-hackers@freebsd.org MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Message-Id: <20021027230049.3BD9DAB93@tesla.foo.is> Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG 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