From owner-freebsd-questions@FreeBSD.ORG Sun Nov 30 01:46:58 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 9AD1E396 for ; Sun, 30 Nov 2014 01:46:58 +0000 (UTC) Received: from nm1-vm4.bullet.mail.ir2.yahoo.com (nm1-vm4.bullet.mail.ir2.yahoo.com [212.82.96.75]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id DD45FCA for ; Sun, 30 Nov 2014 01:46:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rocketmail.com; s=s1024; t=1417312008; bh=2iZB8l7H79E8uW2f1nL2CDAoVrkfYiwmE+xVA3fZ3gs=; h=Date:From:To:Subject:In-Reply-To:References:From:Subject; b=XdP32EYYEXQszf73Ktx7GwjXhHzgkYaos8r8c7v3kctePoXTx4vLj1i/MENh1S5I9EgJk5yd4D3RYD5tIaLYmUBQhY+VGpAIhF+2WTvSnJ77J06e0oqOCcQnLA7PNoXvIrQbqppPZHDeU2MqVJ+RF9nfDnOFr0c7yUbkiUxWAh8= DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=rocketmail.com; b=HbbXs6wNBeC7JXXtT7Ug7+OCI6SN1ms9HFSYxlx4LFMcBqTdMuCov65yzm86P4igomVv7fEu+zu6mBnq1GQv3DzFtLtoyp4LaNYsaZ+IC+0ydTn3tW+7Ow5NTmQPzWHIkulKMkLd1I/BIzeRZJbG6fxBxx30sB3kgFyL5LJXJQ0=; Received: from [212.82.98.127] by nm1.bullet.mail.ir2.yahoo.com with NNFMP; 30 Nov 2014 01:46:48 -0000 Received: from [46.228.39.98] by tm20.bullet.mail.ir2.yahoo.com with NNFMP; 30 Nov 2014 01:46:48 -0000 Received: from [127.0.0.1] by smtp135.mail.ir2.yahoo.com with NNFMP; 30 Nov 2014 01:46:48 -0000 X-Yahoo-Newman-Id: 275284.11767.bm@smtp135.mail.ir2.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: xnXTZdcVM1kEHlo5WebithANFwiKpxn5yeRBNDo..oJg6ZO 0W.gPOUCS0dsrG1ztr6Y4FAKl1U0IlQgA69mapc2w4ma7Xxmm69z51iZor_E VVmfg8qc6tim4LGN5zCQZm7JLLXibLVG7kRUoti4PwHiId1IJGYQH6YopEzp ThG43whvJI_tO6gZSLLqDfoG1i1ZPnpOsyqPq0yYcM6dNmeO0bbgyQNaW67X UkBFTS0JJe75Seed2CSpk9sduFhVDuhUuM3RE1PnpMWvCYZ.7ydoNut9k_XJ qG_GI7l7t4yPrU2UAgEyDcCkq1OIc9OE84SKKdkG80tnKVW9UGzYzAwWs3ce rWlp8_xjFBbDGAumWBkMUCwrJAjPO7VdoTpcbZM2kV72lvjXEm3F_jg92iYK RQ.ICJVCAAR8ZLnLY3zyV2i7zdyM5PmevVTGK6xIxLCjrQaqDImSlT0GdQbl RWtH2YZgz2ddQarKyhxHWWzbHY7GGPI84GU3aOw4BX4x4xj97wTriKk5BnZ8 JFdr21R27DS6Bh0i3dYZzdwyndu3rAR4- X-Yahoo-SMTP: BeMCPs2swBABTJ3kAeEiC_hE0mz8jRexLddJfD8pI2j32fOacjBmXg-- Date: Sun, 30 Nov 2014 02:46:47 +0100 From: Ralf Mardorf To: freebsd-questions@freebsd.org Subject: Re: [Bulk] Re: OT: UPS for FreeBSD Message-ID: <20141130024647.55013135@archlinux> In-Reply-To: <547a52e9.tCBMi6xWobou5Fcd%perryh@pluto.rain.com> References: <54777AB1.9010800@bluerosetech.com> <54779629.302@bluerosetech.com> <5478BD4F.7020306@yahoo.com> <5478BEE6.30308@bluerosetech.com> <5478CC08.9090307@yahoo.com> <20141128204722.561f948e@archlinux> <5478F16A.80605@yahoo.com> <54791d3a.w/pI0kak03d+3nKC%perryh@pluto.rain.com> <20141129113405.3d1bd1d6@X220.alogt.com> <54798883.saa13h6lE6rPwZCf%perryh@pluto.rain.com> <20141129113018.17759e2a@archlinux> <547a52e9.tCBMi6xWobou5Fcd%perryh@pluto.rain.com> X-Mailer: Claws Mail 3.11.1-35-ga8df3ae (GTK+ 2.24.25; x86_64-arch-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 30 Nov 2014 01:46:58 -0000 On Sat, 29 Nov 2014 15:12:41 -0800 perryh@pluto.rain.com (Perry Hutchison) wrote: > However, a full wave bridge (4 diodes) should produce a DC > output roughly equal to the peak-to-peak value of the AC > input, or ~2.8 * the RMS voltage. Perhaps you're right, but at the moment I still guess half of it, 1.4 is the correct value for a 4 diodes rectifier too. OTOH 1.5V voltage loss by the diodes, as I mentioned, might be a half-truth. Often a voltage loss of 0.35V - 0.7V is mentioned. Likely a little bit to OT ;), so I'll be quiet now.