From owner-freebsd-chat@freebsd.org Sat Nov 21 08:24:46 2020 Return-Path: Delivered-To: freebsd-chat@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 74CA647E3D5 for ; Sat, 21 Nov 2020 08:24:46 +0000 (UTC) (envelope-from silver.bullet@zoho.com) Received: from sender4-pp-o94.zoho.com (sender4-pp-o94.zoho.com [136.143.188.94]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4CdRKn3cBcz3lvN for ; Sat, 21 Nov 2020 08:24:45 +0000 (UTC) (envelope-from silver.bullet@zoho.com) ARC-Seal: i=1; a=rsa-sha256; t=1605947082; cv=none; d=zohomail.com; s=zohoarc; b=LFMP3hDEIeHsU8y8/MQmrxfEgbe/TEOSQTsuHm2RAwJAPih9ObJOh3/B+ixEHlZ/JhQEyyof8D4eRbCfo1IJZGcOwa6pcl/LVNM0ijvILwJtnBnp/wpb14mnsA0jrF2sWtN3CskxRCakMIgr1hypkcEzyGAhxMaTc4k8Jjsj9KY= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1605947082; h=Content-Type:Content-Transfer-Encoding:Date:From:MIME-Version:Message-ID:Subject:To; bh=ReIymQ6y31Gw3GhCAEcuFo087SkVxwaqa2XWWzg0Vx0=; b=dsx+PfdWpbXxinLe5+dwOcWEX0YJC4ButXJQFR7tRKAs2fRE86b40uGF4AdHV1Opl/gOc/06szglqOlj/zD7eOofbU/+HdzOYo/9CTatqomyRV+YhULhELV4YIaLNJ0tU6vnhA5GFzocOnnkhFhBP3GHFOzfQIVEFkGZiiVN0xo= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=zoho.com; spf=pass smtp.mailfrom=silver.bullet@zoho.com; dmarc=pass header.from= header.from= Received: from utnubu (dynamic-002-243-074-004.2.243.pool.telefonica.de [2.243.74.4]) by mx.zohomail.com with SMTPS id 1605947080606700.5129131736653; Sat, 21 Nov 2020 00:24:40 -0800 (PST) Date: Sat, 21 Nov 2020 09:24:44 +0100 From: Ralf Mardorf To: freebsd-chat@freebsd.org Subject: Sustainability of switching power supplies Message-ID: <20201121092444.2355c5a7@utnubu> X-Mailer: Claws Mail (linux) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-ZohoMailClient: External X-Rspamd-Queue-Id: 4CdRKn3cBcz3lvN X-Spamd-Bar: ---- X-Spamd-Result: default: False [-4.49 / 15.00]; XM_UA_NO_VERSION(0.01)[]; FREEMAIL_FROM(0.00)[zoho.com]; R_SPF_ALLOW(-0.20)[+ip4:136.143.188.0/24]; TO_DN_NONE(0.00)[]; DKIM_TRACE(0.00)[zoho.com:+]; DMARC_POLICY_ALLOW(-0.50)[zoho.com,reject]; NEURAL_HAM_SHORT(-1.00)[-1.000]; RECEIVED_SPAMHAUS_PBL(0.00)[2.243.74.4:received]; RCVD_TLS_LAST(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[zoho.com]; ASN(0.00)[asn:2639, ipnet:136.143.188.0/23, country:US]; RBL_DBL_DONT_QUERY_IPS(0.00)[136.143.188.94:from]; ARC_ALLOW(-1.00)[zohomail.com:s=zohoarc:i=1]; DWL_DNSWL_NONE(0.00)[zoho.com:dkim]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[zoho.com:s=zm2020]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; RCPT_COUNT_ONE(0.00)[1]; SPAMHAUS_ZRD(0.00)[136.143.188.94:from:127.0.2.255]; RCVD_IN_DNSWL_NONE(0.00)[136.143.188.94:from]; MID_RHS_NOT_FQDN(0.50)[]; RCVD_COUNT_TWO(0.00)[2]; MAILMAN_DEST(0.00)[freebsd-chat] X-BeenThere: freebsd-chat@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Non technical items related to the community List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 21 Nov 2020 08:24:46 -0000 Hi, does anybody know about papers related to the sustainability of switching power supplies? In my very limited experiences they are seemingly less sustainable than old school power supplies. I'm curious, if any paper does exist related to energy efficiency of usage of a power supply, but also taking into account how much energy is needed to repair or replace those switching thingies and classic stone age power supplies. And apart from energy efficiency, how much other resources are required to produce and maintain different kinds of power supplies? My experiences with modern computer power supplies aren't bad, but my impression about switching power supplies in almost everything and the sustainability of this approach ... voltage undersized caps etc. isn't good. Regards, Ralf