LM317T Voltage Regulator with Pass Transistor

Zener Diodes and Silicon Diodes, Multiple Output Regulated Power Supply.



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How to build your own linear adjustable power supply based on LM317. In this tutorial I'll explain how linear power supply works, what parts it consists and ...



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a remade computer tower into a 30 amp dc power supply 1.5 volt to 37 volt original circuit @ htt://www.zen22142.zen.co.uk could be modified to other voltages and amp loads could be battery or mains voltage www.docstoc.com



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READ THIS FIRST: Small tutorial on Computer ATX Power Supplies. How to use them, how to connect them in series, in parallel. What is 12V rails? Is it possible to connect 12V rails together? ATX connector wiring explained. What is difference between old computer power supplies and new ones? And finally how to make Lab Bench Power Supply from Computer ATX Power Supply. WARNING: Computer power supply has a BIG HIGH VOLTAGE capacitors inside, that could hold a potentially DEADLY CHARGE! DON'T TAKE APART POWER SUPPLY IF YOU DON'T KNOW HOW TO WORK WITH MAINS-RATED EQUIPMENT!!! ADDITIONAL INFO & PHOTOS: jumperone.com FREQUENTLY ASKED QUESTIONS: jumperone.com ATX WIKIPEDIA PAGE: en.wikipedia.org And you can find some more cool stuff on www.jumperone.com



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This video describes a quick and effective way to measure magnetic field emission from switching power supplies. Such emissions have caused many field problems.



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BenchTop adjustable power supply for powering systems, consoles, circuits, etc... The LongHornEngineer: www.youtube.com TheCowGod's ATX PS: letsmakerobots.com The Adj. Voltage Regulator & schematics used: www.datasheetcatalog.org Thanks for watching



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Official Page with More Information: newbiehack.com This video shows an AC to DC power supply in detail explaining the waveform throughout the circuit to see why capacitors are used around the regulator.



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boginjr.com A few resistor modification, some desoldering, wiring and an LED voltmeter from eBay and voila, our new supply with overcurrent protection (short circuit proof) is now done. Video includes "heavy duty testin' " with a small peewee two watt 0R58 resistor (to check the maximum current provided by the supply), purposely haven't kept it there for more than a second or two, or else it would burst in flames real quick xD - And say goodbye to your LM317 "lab power supplies" !



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this is a little electronics project i decided to build using simple compononets. it allows me to input any voltage from around 4v-30v and always have 3v out. components: 1kohm variable resistor 220ohm resistor 1watt lm317t regulator + heatsink 1uf capacitor and .1uf capacitor diagram: www.tapr.org



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Magnum S45 with blown 2SB754 output supply regulator, common symptoms are loss of AM audio and swing and loss of variable power adjustment. The 2SB754 which was made by Toshiba is now obsolete but can be replaced with the 2SB817 which is made by Sanyo. Early version using 2SC1969's in parallel for high output.



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Bipolar power supply from unipolar. Circuitry engineeringIn the process of construction of various electronic devices, there are often situations when a bipolar power supply is required to power them. In case there is a transformer with one step-down winding, it is not difficult to make a source with bipolar power supply. Moreover, some of the circuits are also constant-voltage regulators. Here is one of the examples of a bipolar constant-voltage regulator. The circuit consists of 3 simple voltage regulators. Alternating current voltage is applied on the diode bridge, the plus of which comes to the collector of the transistor VT2, from its emitter, relative to minus, the constant voltage of +12 V is removed. Consequently, the voltage difference between the collector and the emitter of the transistor VT2 is 15 V. Therefore, this voltage is used by the transistor VT1, and on its emitter, relative to the emitter of the transistor VT2, a constant voltage of +12 V is also received, and relative to the minus, the voltage is +24 V. Now we have a plus, total and a minus. But imagine a situation when there will occur a short circuit of the output of the circuit-wise high-side, in other words, when the emitter VT2 will be closed to the emitter VT1, namely, there will be +24 V on the common wire, relative to minus. This can result in the bringing out of operation the power supply system. To avoid this, a stabilizer is set according to the minus on the transistor VT3. The circuit has ...



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Ultimate Performance! High efficiency not only helps protect the environment but also allows the XFX 850W Black Edition Modular Power Supply to run cool and quiet while also combining both fixed and modular cables to deliver superior performance and flexibility. Its all about the XFX 850W Black Edition Modular Power Supply and it is designed specifically for the high performance gamer. The XFX 850W Black Edition Modular Power Supply supports multiple high-end graphics cards. Offering an array of unparalleled features, the XFX 850W Black Edition Modular Power Supply delivers exceptional performance.



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In this video you can view the work of a voltage regulable power supply from 20 to 0 V. I used components from an old TV and another electric machines.



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Step by step power supply construction for hobby projects PS 1 www.youtube.com PS 2 www.youtube.com PS 3 www.youtube.com Load Lamp www.youtube.com Hall Sensors www.youtube.com www.bristolwatch.com



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This video covers the basics of diodes, bridge rectifiers, and how to build simple unregulated AC to DC power supplies than can handle a few mA up to several Amps. I recommend watching my transformer tutorial first if you are confused about where I am getting the AC voltages from: www.youtube.com This is a followup video on how to make a regulated voltage supply: www.youtube.com Don't forget to subscribe!



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Petey demos his home made pedal power supply brick . the unit can power a pedal board @ 9 volts , negative polarity , meaning center conductor is the minus , like boss standard . it has two 12 volt ports on for reverse and one forward polarity . additionally featuring ports for 3 , 5 , and 6 volt outputs for powering smaller draw devices . the unit is fused , uses an led and is powered from an old HP printer power supply that puts out 18 volts / 1.6 amps . simple design featuring filtering , and uses commonly available / low cost lm7809 and other voltage regulators . AC adapter repair video : youtu.be



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Chargery Power, a Chinese electronics company, was kind enough to provide me with one of their new power supplies to test it. In my test, it worked very well! The output voltage is very stable, and the overcurrent protection reduces the output voltage, instead of switching it of. A nice feature! The noise from the fans is not that lout, I expected more noise from a unit of that output. All in all, I am very pleased, and can definitely recommend the Chargery S1200.



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Plug pack regulator talkingelectronics.com Simple charger www.circuitdiagram.org



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this is a homemade lab power supply. 2 - 32 volts 4amps. it is based on the lm723 regulator on a home made printed circuit board. the transformer and caps came from axeman surplus store. the meters came from some really old equipment. the amp meter has a homemade shunt. the case is made from the shell of an old microwave. a shot goes out to my uncle that helped with the case. here is the schematic i based it on. hmin.tripod.com



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Visit www.engineeringshock.com or www.electroniclessons.com Here is the instructables link. Copy and paste to browser: www.instructables.com



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