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Line 1: A good clean power supply unit (PSU) is the most important part of a modular system. A proper [[Power supply (linear)\|linear power supply]] and good distribution makes a big difference to the stability and sound quality of the system.<ref>[https://www.~~muffwiggler~~modwiggler.com/forum/viewtopic.php?p=1470018 Best Eurorack Power Supply (PSU) for your buck?], ~~Muff~~Mod Wiggler forum, 23 Feb 2014</ref> [[Power supply (switching)\|Switch-mode power supplies]] are smaller, lighter, and much more efficient than linear power supplies but produce more noise, (above audio range) on their output.<ref>[{{Cite web \|url=http://cp.literature.agilent.com/litweb/pdf/5990-3242EN.pdf \|title=Understanding the Importance of Low-Noise Linear Power Supplies] \|accessdate=2016-03-04 \|archiveurl=https://web.archive.org/web/20121219163349/http://cp.literature.agilent.com/litweb/pdf/5990-3242EN.pdf \|archivedate=2012-12-19 \|url-status=dead \|df= }}</ref> ▼ ~~== Power supplies ==~~ ▲A good clean power supply unit (PSU) is the most important part of a modular system. A proper [[Power supply (linear)\|linear power supply]] and good distribution makes a big difference to the stability and sound quality of the system.<ref>[https://www.muffwiggler.com/forum/viewtopic.php?p=1470018 Best Eurorack Power Supply (PSU) for your buck?], Muff Wiggler forum, 23 Feb 2014</ref> [[Power supply (switching)\|Switch-mode power supplies]] are smaller, lighter, and much more efficient than linear power supplies but produce more noise on their output.<ref>[http://cp.literature.agilent.com/litweb/pdf/5990-3242EN.pdf Understanding the Importance of Low-Noise Linear Power Supplies]</ref> === Safety === Use a [https://en.wikipedia.org/wiki/Residual-current_device RCD]. Mains voltages can kill and [[capacitor]]s in disconnected power supplies can still deliver quite a jolt. Unless you're qualified to work with mains electricity, ready made external transformers are safer. ~~Remember charged [[capacitor]]s can deliver quite a jolt.~~ == Comparison == {\|class="wikitable" ▼ !rowspan="2"\|Brand!!rowspan="2"\|Model (& web page)!!colspan="3"\|Current rating (A)!!rowspan="2"\|DIY/Ready built!!rowspan="2"\|Transformer type!!rowspan="2"\|Bus!!rowspan="2"\|Schematics!!rowspan="2"\|Comments!!rowspan="2"\|See also ▲{\|class="wikitable" sortable" !Brand!!Model (& web page)!!Type<ref group="note">Trying to decide what's linear or switching, the transformers are mostly interchangeable so instead going by the type of regulators.</ref>!!Volts & max. Amps!!Transformer type!!Main components!!Distribution!!Licence!!Comments!!Further info \|- \|[[AI Synthesis]]\|\|[https://aisynthesis.com/product/eurorack-power-supply/ Eurorack Power Supply]\|\|linear\|\| +/-12V \|\|12V AC wall wart\|\|7812, 7912\|\|\|\|\|\|PCB and components kit.\|\|[https://aisynthesis.com/diy-eurorack-power-supply-build-guide/ build guide, schematic] ~~!+12V!!-12V!!+5V~~ \|- \|[[Befaco]]\|\|[https://web.archive.org/web/20160305071621/http://www.befaco.org/en/tienda/power-bus-diy-kit/ Power bus DIY kit]\|\|linear\|\| +/-12V @ 0.7A, 5V @ 0.3A\|\|internal switched PS +/-15V DC unit\|\|LM317TL, LM337TL, 78M05\|\|Regulators are on a bus with 14 headers\|\|[https://creativecommons.org/licenses/by-sa/3.0/ CC-BY-SA]\|\|PCB and components kit.\|\|[https://web.archive.org/web/20160405171645/http://www.befaco.org/en/fuente-alimentacion/ schematic, assy instructions, Eagle files] ~~\| [[4MS]]\|\|\|\|\|\|\|\|\|\|Ready made\|\|Switching\|\|\|\|\|\|\|\|~~ \|- \|[[Clicks & Clocks]]\|\|[http://clicksclocks.de/tag/psu PSU]\|\|linear\|\|+/-12V @ 1.2A\|\|toroidal attached to PCB\|\|LM317, LM337\|\|Separate bus with 14 headers\|\|With permission of Doepfer\|\|Modelled on [[Doepfer A-100]] PSU2\|\|[http://www2.doepfer.de/?p=2806&lang=en A-100 Technical Details] ~~\| [[Befaco]]\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|~~ \|- \| [[~~Doepfer~~Dintree]]\|\|[http://www.~~doepfer~~dintree.decom/~~a100z_e.htm~~#D112 ~~A-100PSU3~~D112 Power Supply]\|\|2switching\|\|1+/-12V @ 0.2625A, 5V @ 0.5A\|\|4external 12V DC switched brick\|\|~~Ready~~VBED15, ~~made~~7805\|\|~~Switching,~~12 ~~mounted~~headers on PSU PCB\|\|~~Separate~~for Anon-~~100~~commercial ~~bus\|\|none~~use only\|\|~~Supersedes~~Uses ~~previous~~ready ~~models~~made DC to ~~since~~DC ~~2016~~converter\|\|[http://~~clicksclocks~~www.dedintree.com/~~tag/psu Clicks &~~#D112 ~~Clocks~~schematic] \|- \| [[~~MFOS~~EFM Synthesizers]]\|\|[http://www.~~musicfromouterspace~~modular.~~com~~fonik.de/~~analogsynth_new~~files/~~POWERSUPPLY2009~~EFMforum/~~POWERSUPPLY2009~~orgEFMfiles/3500er/3501_PSU.~~php~~pdf ~~Adjustable~~3501 ~~LM317/LM337 1.5A~~Power Supply]\|\|linear\|\|+/-12V @ 1.5A\|\|external transformer\|\|LM317, LM337\|\|\|\|can be adapted\|\|\|\|\|\| \|- \|[[Eowave]]\|\|[http://www.eowave.com/modules/diy-kits/diy-power-supply/ DIY PSU]\|\|switching\|\|+12V @ 1.5V, -12V @ 0.7A,<ref>[http://www.mouser.com/ds/2/405/lm2576-405253.pdf LM2576/LM2576HV Series SIMPLE SWITCHER® 3A Step-Down Voltage Regulator], p.20</ref> 5V @ 0.5A ~~\| [[MFOS]]\|\|[http://www.musicfromouterspace.com/analogsynth_new/WALLWARTSUPPLY/WALLWARTSUPPLY.php Wall Wart Power Supply]\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|~~ \|\|external 15V 4A DC switched brick\|\|2xLM2576T, 7805\|\|Separate bus with 15 headers\|\|proprietary\|\|PCB and components kit\|\|[https://www.modwiggler.com/forum/viewtopic.php?t=136240&start=0 Mod Wiggler forum] \|- \|[[Erica Synths]]\|\|[https://web.archive.org/web/20160418113647/http://ericasynths.lv/en/shop/diy/diy-kits-1/eurorack-bipolar-12v-psu-kit/ 12V bipolar 1.5A PSU] \|\|linear\|\|+/-12V @ 1.5A\|\|toroidal attached to PCB\|\|LM317, LM337\|\|Separate bus with 14 headers\|\|proprietary\|\|PCB, hardware and components kit\|\|[https://www.modwiggler.com/forum/viewtopic.php?t=125684&start=all&postdays=0&postorder=asc Mod Wiggler forum] ~~\| [[Synthrotek]]\|\|[http://www.synthrotek.com/products/modular-circuits/deluxe-power/ Deluxe Power Module]\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|~~ \|- \|[[Frequency Central]]\|\|[http://www.frequencycentral.co.uk/?page_id=894 FC Power DIY]\|\|linear\|\|+/-12V @ 0.5A, 5V @ 0.1A\|\|12V AC wall wart\|\|7812, 7912, 78L05\|\|1 header or solder leads to PCB\|\|\|\|PCB only. Inexpensive solution for small Euro system.\|\|[https://web.archive.org/web/20160402182233/http://www.frequencycentral.co.uk/wp-content/uploads/2013/02/FC-Power-Build-Doc.pdf FC Power Build Doc] ~~\| Synthrotek\|\|[http://www.synthrotek.com/products/modular-circuits/eurorack-power-distribution-boards/ Eurorack 5A Power Supply]\|\|2.2\|\|1.3\|\|1.5\|\|\|\|\|\|\|\|\|\|\|\|~~ \|- \|[[Frequency Central]]\|\|[http://www.frequencycentral.co.uk/?page_id=1766 Routemaster DIY]\|\|linear\|\|+/-12V @ 0.5A, 5V @ 0.1A\|\|12V AC wall wart or 12V centre-tapped transformer\|\|LM317, LM337, 78L05\|\|12 Euro, MOTM, or Dotcom headers integrated on PSU PCB\|\|\|\|PCB only. Inexpensive solution for small Euro system.\|\|[https://web.archive.org/web/20161215232344/http://www.frequencycentral.co.uk/wp-content/uploads/2016/08/Routemaster-Build-Document.pdf FC Routemaster Build Doc] ~~\| [[Tiptop Audio]]\|\|[http://www.tiptopaudio.com/zeuspwr.php Zeus]\|\|\|\|\|\|\|\|\|\|External switching brick 15V DC, 4.6A, 2.5mm [[DC jack]]\|\|\|\|\|\|\|\|~~ \|- \|[[L-1]]\|\|[http://l-1.su/Power.html 12V bipolar linear PSU+busboards]\|\|linear\|\|+/-12V @ 1.5A\|\|toroidal attached to PCB\|\|2xLD1084, 7805\|\|Two 12 header bus PCBs with kit. +5V regulator mounted on bus off 12V rail\|\|\|\|Full kit for PSU + two busboards\|\|[https://www.modwiggler.com/forum/viewtopic.php?t=128163 Mod Wiggler forum] ~~\| Tiptop Audio\|\|[http://www.tiptopaudio.com/zeusmicro.php μZeus]\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|~~ \|- \|[[Electronic Things… And Stuff]]\|\|[https://www.tindie.com/products/dhaillant/mini-dual-power-supply/ Mini Dual Power Supply]\|\|linear\|\|+/-12V @ 0.5A\|\|12V AC wall wart\|\|7812, 7912\|\|Separate kits for 8 or 14 header bus\|\|\|\|\|\| \|- \|[[Metatronic Mods]]\|\|[https://web.archive.org/web/20171102184410/http://www.metatronicmods.com/store/p9/Analog_Power Analog Power]\|\|linear\|\|+12V @ 2.5A, -12V @ 1.5A, optional 5V @ 1.0A/0.5A\|\|toroidal attached to PCB\|\|MIC29300, LM2990T-12, R-78E5.0\|\|separate\|\|\|\|switching regulator for +5V\|\| \|- \|[[MFOS]]\|\|[https://web.archive.org/web/20160115005401/http://www.musicfromouterspace.com/analogsynth_new/POWERSUPPLY2009/POWERSUPPLY2009.php Adjustable LM317/LM337 1.5A Supply]\|\|linear\|\|+/-12V @ 1.5A\|\|separate transformer\|\|LM317, LM337\|\|\|\|free for non-commercial use\|\|PCB or PCB and components\|\| \|- \|MFOS\|\|[https://web.archive.org/web/20160409015835/http://www.musicfromouterspace.com/analogsynth_new/WALLWARTSUPPLY/WALLWARTSUPPLY.php Wall Wart Power Supply]\|\|linear\|\|+12V @ 1A\|\|external AC wall wart\|\|LM78XX/LM79XX or LM78LXX/LM79LXX\|\|\|\|free for non-commercial use\|\|PCB or PCB and components. Not Eurorack but included for completeness.\|\| \|- \|[[ModularSynth.ru]]\|\|[http://www.modularsynth.ru/en/diy/low_cost_psu/ Low-Cost PSU]\|\|linear\|\|+/-12V @ 1A, 5V @ 0.5A\|\|AC wall wart/separate transformer\|\|7812, 7912, 78L05\|\|\|\|[https://web.archive.org/web/20160412191857/http://creativecommons.org/licenses/by-nc-sa/3.0/deed.en CC-BY-NC-SA]\|\|\|\| \|- \|ModularSynth.ru\|\|[http://www.modularsynth.ru/en/2014/07/18/regulated_psu_update/ Regulated Bipolar PSU]\|\|linear\|\|+/-12V @ 1.5A, 5V @ 1.5A\|\|separate transformer\|\|2xLM317, LM337\|\|\|\|[https://web.archive.org/web/20160412191857/http://creativecommons.org/licenses/by-nc-sa/3.0/deed.en CC-BY-NC-SA]\|\|\|\| \|- \|[[Moraydular]]\|\|[https://github.com/vaeinoe/moraydular/tree/master/virta Virta PSU]\|\|linear\|\|+12V @ 1.5A, -12V @ 1A\|\|switching wall wart\|\|LM2991T, LM1086\|\|12 header board with optional 7805, see [https://www.modwiggler.com/forum/viewtopic.php?t=149598&start=all&postdays=0&postorder=asc Mod Wiggler thread]\|\|\|\|under development\|\| \|- \|[[stroh]]\|\|[http://synthcube.com/cart/index.php?route=product/product&product_id=590 modular power supply]\|\|linear\|\|+/-12V <!--@ 1.5A -->, 5V <!--@ 1.5A -->\|\|toroidal mounted on PCB\|\|LM317T,LM337T,LM1086\|\|Detachable 2"x6" 12 header board with 5x10-pin Euro, 4x16-pin Euro, 8x6-pin Dotcom/MU and 8xMOTM/Frac headers. \|\|\|\|PCB only or full kit.\|\|[https://www.~~muffwiggler~~modwiggler.com/forum/viewtopic.php?t=~~87757~~97492&start=all&postdays=0&postorder=asc ~~Linear Power Supplies!], Muff~~Mod Wiggler forum~~, Jun. 2013~~]▼ \|} == Notes == == External links ==<!-- in chronological order -->▼ {{reflist\|group=note}} ▲[https://www.muffwiggler.com/forum/viewtopic.php?t=87757&start=all&postdays=0&postorder=asc Linear Power Supplies!], Muff Wiggler forum, Jun. 2013 [https://www.muffwiggler.com/forum/viewtopic.php?t=95705&start=all&postdays=0&postorder=asc Power supply battle: TipTop,Elby,Doepfer,MakeNoise,4ms etc], Muff Wiggler forum, Oct. 2013▼ [https://www.muffwiggler.com/forum/viewtopic.php?t=105781&start=all&postdays=0&postorder=asc Best Eurorack Power Supply (PSU) for your buck?], Muff Wiggler forum, Feb. 2014▼ [https://www.muffwiggler.com/forum/viewtopic.php?t=148733&start=all&postdays=0&postorder=asc New Doepfer Power Supply A-100PSU3], Muff Wiggler forum, Oct. 2015▼ == References == {{~~Reflist~~reflist}}~~<!--~~ Primarily [https://docs.google.com/spreadsheets/d/17qu-PkyJnjZf9YzhNYy7X7-d-lmZqhahyUW0YM1b2N0/edit#gid=0 The big eurorack PSU list] curated by Hannes Pasqualini and John Loffink of [http://www.horizontalpitch.com/ Horizontalpitch] with help from community members of the [http://mutable-instruments.net/forum/discussion/5571/power-supply-options/ Mutable Instruments] and [https://www.muffwiggler.com/forum/viewtopic.php?p=1706066 Muff Wiggler] forums. ▲== External links ==<!-- in chronological order --> ~~-->~~ * [http://www.electro-music.com/forum/viewtopic.php?t=51694&postorder=asc Linear Power Supply For Modular Synth Application.], Electro-Music forum, Jan. 2012 * [https://www.modwiggler.com/forum/viewtopic.php?t=87757&start=all&postdays=0&postorder=asc Linear Power Supplies!], Mod Wiggler forum, Jun. 2013 ▲* [https://www.~~muffwiggler~~modwiggler.com/forum/viewtopic.php?t=95705&start=all&postdays=0&postorder=asc Power supply battle: TipTop,Elby,Doepfer,MakeNoise,4ms etc], ~~Muff~~Mod Wiggler forum, Oct. 2013 ▲* [https://www.~~muffwiggler~~modwiggler.com/forum/viewtopic.php?t=105781&start=all&postdays=0&postorder=asc Best Eurorack Power Supply (PSU) for your buck?], ~~Muff~~Mod Wiggler forum, Feb. 2014 ▲* [https://www.~~muffwiggler~~modwiggler.com/forum/viewtopic.php?t=148733&start=all&postdays=0&postorder=asc New Doepfer Power Supply A-100PSU3], ~~Muff~~Mod Wiggler forum, Oct. 2015 * [https://docs.google.com/spreadsheets/d/17qu-PkyJnjZf9YzhNYy7X7-d-lmZqhahyUW0YM1b2N0/edit#gid=0 The big eurorack PSU list], for a wider comparison both DIY and ready made === Other useful power projects === * [https://web.archive.org/web/20160403005206/http://www.cgs.synth.net/modules/cgs73_bus.html Power Bus Board], Ken Stone's Modular Synthesizer * [https://web.archive.org/web/20160402193654/http://www.cgs.synth.net/modules/cgs63_psd.html Power Supply Delay], Ken Stone's Modular Synthesizer [[Category:Eurorack]] [[Category:Power supplies]]