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How to Convert a Computer ATX Power Supply to a Lab Power Supply

How to Convert a Computer ATX Power Supply to a Lab Power Supply
Edit Article Edited by Abizarl, Krystle C., Jack Herrick, Vertent and 42 others Computer power supplies cost around US$30, but lab power supplies can run you $100 or more! By converting the cheap (free) ATX power supplies that can be found in any discarded computer, you can get a phenomenal lab power supply with huge current outputs, short circuit protection, and reasonably tight voltage regulation on the 5V line. On most power supply units (PSUs), the other lines are unregulated. Ad Steps 1Look online or at your local computer store for an ATX computer power supply, or dismantle an old computer and remove the power supply from the case.Ad 2Unplug the power cable from the power supply and turn off the switch on the back (if there is one). 13 Plug the power cable into the back of the power supply and into an AC socket. Tips You can use your power supply 12V output as a car battery charger! Warnings If you suspect the power supply is damaged, do not use it! Related:  ATX power supply -> Lab bench power supplyElectrónica

Transformer une alimentation ATX en alimentation de laboratoire Cette technique permet de réaliser une alimentation de laboratoire à partir d’une vielle alimentation ATX d’ordinateur. Voilà qui est bien pratique pour fournir de la tension à nos montages électroniques DIY. Cela fait déjà un petit moment que je comptais réaliser ce hack simple, mais par manque de temps, j’utilise bien souvent une alimentation ATX, sur laquelle j’utilise les connecteurs de base est je court-circuite le pilotage. Cette version réalisée par Phil Levchenko de JumperOne est vraiment bien faite, avec très peu d’éléments il est possible de disposer d’une alimentation stabilisée qui vous délivrera les tensions suivantes : +3,3V / +5V /+12V /-12V / -5V. On remarquera que Phil a bien isolé chacun de ses points de soudure avec de la gaine thermo-retractable et qu’il a utilisé de grosses résistances de charges pour faire chuter la tension lors de la coupure, car selon vos montages, une simple coupure d’alimentation n’aura pas fallu à faire baisser la tension rapidement.

Bench PowerSupply - My Scratchpad Ive increasingly found I need a better power supply while working on my Arduino projects. So here is my version of the standard ATX power supply conversion wrapped in a nice metal case I had laying around. Heres the finished product. Im quite pleased with how it turned out. There are loads of guides on how to use the ATX supplies on google. 12v, 9v, 2x5v, 3.5v and a variable supply. Inside I have an ATX PC power supply stripped out of its metal casing and fixed into my metal case. Ive taken the power socket and fixed it onto the back plate of the case.Im using a smaller 12v fan to fit beside the power socket. 12v, 5v and 3.5v are taken directly from the ATX power supply and connected to the switch and then to the red post. The 9v supply is from an LM7809 regulator connected to the 12v supply and an LM317 is used for the variable supply, again connected to the 12v supply. Im really pleased with how the case turned out especialy the front panel.

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Resistor Color Codes & Component Identification Resistor Color Code Bands& Other Component Identification Resistor Color Code Identification While these codes are most often associated with resistors, then can also apply to capacitors and other components. The standard color coding method for resistors uses a different color to represent each number 0 to 9: black, brown, red, orange, yellow, green, blue, purple, grey, white. On a 4 band resistor, the first two bands represent the significant digits. Alpha-Numeric Code Identification With the sizes of resistors and other components shrinking or changing in shape, it is getting difficult to fit all of the color bands on a resistor. Naming Convention To simplify the writing of large resistor values, the abbreviations K and M are used for one thousand and one million. The E12 Range These identify a range of resistors that are know as "preferred values". 1.0, 1.2, 1.5, 1.8, 2.2, 2.7, 3.3, 3.9, 4.7, 5.6, 6.8 and 8.2 The E24 Range There are also E48 and E96 tables, which have even more values.

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potencia La potencia es un concepto de gran importancia cuando hablamos de la interconexión entre amplificadores y altavoces. El nivel de potencia de esta interconexión y por supuesto la eficiencia y directividad del altavoz, determinan el nivel de presión sonora (SPL) generado. Hay varias especificaciones de potencia comúnmente utilizadas, entre las que tenemos: 1.- Potencia RMS. El valor RMS de una onda sinosoidal es el 0,707 de su valor máximo, o lo que es lo mismo, el 70,7%. 2.- Potencia promedio o "averaje" . El valor promedio de una onda sinosoidal, es 0,637 de su valor máximo 463,7%). 3.- Potencia continua. 4.- Potencia pico. 5.- Potencia programa. 6.- Potencia musical. Se han llegado a crear términos ridículos tales como PMPO (siglas en inglés)por Potencia Máxima Pico de Salida, que es sólo por milésimas de segundo y a 1 KHz.