LM317T Voltage Regulator with Pass Transistor

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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Modern automotive pressure sensors are of up most importance, whether gasoline or diesel engines. Did you know that a faulty HVAC or air conditioning high pressure sensor can make the engine not start? It so happens that on some vehicles (Cadillacs) the high pressure sensor is connected to the other sensor voltage reference line. So a shorted sensor will render the crank sensor inoperable. Get the scoop here on pressure sensors. They're used in injection systems, transmission, HVAC and many other systems. Presented using advanced software CG animation technology to help you understand. Part of our wiring diagram and electronic series shown here on this channel. Enjoy...



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A list of my multimeters can be purchased here: astore.amazon.com This series of videos is a tutorial on how to use a digital multimeter for beginners. It will also explain the basics of electricity and address some safety issues. This first video covers how to measure AC (alternating current) and DC (direct current) voltage. I use a Fluke 177 multimeter for this demonstration provided by Comtest: www.ComTest.co.za Items covered in this multimeter tutorial: * Multimeter safety * How to measure battery voltage; how to measure a car battery / lead acid battery; how to measure mains electricity / power outlet / 220 volt / 110 volt. * What is electricity; how does electricity work; what is voltage; what is current / amps / ampage / ampere.



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DC-DC Converter Output Ripple www.vpt-inc.com By Steve Butler, VP of Engineering at VPT Inc. Topics include: •Definition and causes of common mode and differential mode output ripple •Simple, effective ways to control output ripple •Lab demonstrationSee all of VPT's videos on technical issues for incorporating DC-DC power converters, EMI filters, and other power products into your avionics, military, or other high reliability power system: www.vpt-inc.com



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Das ist mein Projekt aus der Woche zwischen den Weihnachts- und Jahresendfeiertagen. Ein stabilisiertes Festspannungnetzteil für die wichtigsten Spannungen zum experimentieren. 12V, 9V, 5V und 3V ist auch noch in Planung, wenn ich den 3V Spannungsregler habe. Mehr auf: www.qslnet.de



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THIS IS A VIDEO TO SHOW THOSE WHO DONT WANT TO SPEND A LOT OF MONEY FOR THE BIG SYSTEMS OUT THERE. THE BLACK UNIT IN THE BACK GROUND IS THE ONE THAT IM MAKING FOR A FRIEND WHO WILL USE IT WITH GREAT GLADNESS. HIS ELECTRICAL SYSTEM WAS ALMOST COMPLETELY DESTROYED BY LIGHTENING. IT WOULD COST TOO MUCH FOR REPAIRS AND NEW DEPOSITS AND OLD BILL TO RECONNECT, ESPECIALY WITH REPAIRS FOR A NEW SERVICE BOX AND UPDATING TO A BREAKER SYSTEM AND THE WIRES DESTROYED IN THE HOUSE. ALTHOUGH THIS UNIT WILL NOT NORMALLY SUPPLY A NORMAL HOUSE HOLD IT WILL ALLOW HIM TO HAVE LIGHTS , RADIO, TV , CELLPHONE CHARGING, AND A FEW MORE THINGS BUT NOT ALL AT ONCE OR CONSTANTLY. BUT 20 DOLLARS A DAY FOR GAS IN A GENERATOR IS NOT AN OPTION EITHER. A BAG OF ICE, AND A COOLER IS. WE ARE MAKING A SOLAR HOT WATER HEATER AS WELL. BY 1:00 PM HE WILL HAVE ENOUGH WATER TO DO DISHES AND GET A NICE HOT SHOWER. THEN RELAX BY THE TV OR RADIO FOR A FEW HOURS ON STORED ENERGY. THEN GO TO SLEEP WITH A SMILE. IF HE GETS UP IN THE NIGHT HE CAN JUST TURN ON THE LIGHT. AND ITS ALL FREE. I HAVE ONE CONFESSION TO MAKE ABOUT THE ONE IN THE FIRST VIDEO THAT EVERYONE HAS COMPLEMENTED ON FROM THE BEGINNING. THAT IS , THAT THE ONE THAT IS IN THE VIDEO IS THE 7th OR 8th ONE I DID. I DID IT FOR SOMEONE ELSE BUT I DESTROYED ONE OF THE COIL SETS IN IT BY PULLING ON THE WIRES TO HARD WHILE I WAS RETHREADING THE WIRES TO COME OUT THE OTHER SIDE. BUT THE 12 VOLT SYSTEM INSTEAD OF 24 VOLT SYSTEM WILL NOT SLOW THE BLADES DOWN WHEN ...



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The project is essentially done and ready for delivery to the strawbale home where it will live. The only thing to add now is a bit of + / - physical protection to avoid bumping live buss bars, a small AA charge, and a lamp. This setup will basically be used to run a few kitchen appliances like food processors, etc, in an off grid home. When the SLA's die, each one (5 total) will be replaced with (2) 6V Trojans in series, thus comprising a 1000 Amp Hour Bank. That is why everything was done beefy, to accomodate that. I will post links to the parts I used; everything was quite affordable. The setup as shown cost less than $300 incl. everything you see. the inverter is a Xantrex 3000 watt modified sine wave with max 300A input. Blue LCD DC 500A Digital LED Panel Ammeter/ amp Ampere Meter Without shunt available by ebay vendor minishop_008 for $9.99 free shipping. myworld.ebay.com DC 500A 75mV Current Shunt For Ampmeter Analog Panel AMP Meter Ammeter - matching shunt for above ammeter by minishop_008 for $9.99 free shipping. LCD Digital Blue Voltage Volt Meter Voltmeter Panel 20V - $4.99 free shipping available by vendor bestnbestonline. myworld.ebay.com Entire metering package cost was $25. 20A 12V/24V PWM Solar Street Light Panel Charge Controller Regulator Auto switch $14.99 free shipping myworld.ebay.com myworld.ebay.com



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I thought that using a voltage regulator may be intimidating to some people so I made this video showing a little simpler way to hook up three lasers to a 9V battery. The original reason for the voltage regulator is that it keeps the lasers safe with no voltage variations or spikes. and also it keeps the lasers the same brightness for alot longer, but with only the resistors (like in this video) the lasers will get dimmer as the voltage goes down on the battery, yes that means that the voltage regulator would keep the lasers at the same brightness for alot longer------ to a point (once the battery discharges to 6.2V and then they'll start getting dimmer. You need to make sure to have a 330 ohm resistor on each individual laser. "Enjoy the Poop!!!", where did that come from?



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Link to page: www.pcbheaven.com This is the remake of the third episode of the LED driving and controlling methods Theory Series. In this episode i explain how can someone design a constant current LED driver with a single transistor, biased with a Zener diode to achieve constant current regulation regardless of the power supply voltage. Additionally, i analyze a second circuit with sme functionality but instead of the Zener diode i use two simple diodes. On-line calculator for this circuit: www.pcbheaven.com



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My multimeter has an Offset error (-0.4V). The correct value is 14,4V . My gallery about completly alternator and regulator repairing: www.sportmotor.hu Voltage Rectifier/Regulator malfunction: A typical cause is !!NOT!! a bad SH633-12 regulator. The generator will be groundfault at high temperatures. Can not be measured by Multimeter only by Insulation Tester! Regulator alternates: moto-electro.ru or home.comcast.net !!! You should check the coil. Charging coil line (yellow to yellow) 0,1...0,3 OHm Ground line Contiunity should exist about 10GOhm/500V...50 GOhm/500V You can check this by ( Insulation Tester) or home technique: 1 Remove the whole alternator 2 switch DC voltage 0...230V :-) between one yellow and alternator-cover 3 Measure the current ( if your alternator is good, you can not measure anything by multimeter) 4 Calculate resistance (10^9 Ohm , G ohm) // 5 Heat to 100 ° C and repeat 2 to 4 // My measuring was 30Kohm when I warmed it to 100° C and this is very bad !!! 20° C was 1GOhm !!! I hope you find the problem ! If you have any question do not hesitate to contact me. My email: benzinszag@freemail.hu



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rebuilderinabox.com - Go here to help locate the proper rebuild kit and the rest of this video for your vehicle.



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A quick tutorial on connecting inverter / charger batteries in series to increase voltage. For more information on Tripp Lite's inverter / chargers and related accessories, go to: www.tripplite.com



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Understandably, this is not going to save the planet or signifigantly reduce your electric bill but it will give you really intense workout. It just seemed to make good sense that an alternator would work well since it is already voltage-regulated and cheap & easy to obtain. It is important to get the alternator spinning before you energize the rotating field or it will be very hard to get it up to speed. The amount of power you can get depends on how strong your legs are and the size of the inverter you use. I doubt the alternator could be maxed out with human power. Of course, you could modify the alternator if you wanted to. I've gotten 160 amps before out of a modified Delcotron. This one puts out 35 amps. Now, I realize some people would ask whats the point of all this. Well, whats the point of a stationary bike anyways? You expend energy for nothing as it goes nowhere. At least you could run a TV, stereo, lights, or whatever while you're at your exercise routine. Some of you auto electric experts might want to point out the seemingly high voltage and say "Hey, it should be no more than 13.8 volts" but this is a $3.50 volt meter!



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READ FOR CURRENT PARTS LIST: Year: 1976 Make: Triumph (British Leyland) Model: TR7 Engine Stuff: Nissan Sr20det S13 Blacktop Garret GT2871r .64 trim turbo Tomei exhaust manifold Tomei plug cover Brian Crower 264 Cams SARD 550cc side feed injectors Nissan Z32 MAF Circuit Sports aluminum fuel rail Circuit Sports turbo lines Circuit Sports aluminum pullys Aeromotive fuel pressure regulator Aeromotive fuel filter Braided fuel lines Greddy turbo outlet ACT stage 2 clutch HKS SSQV blow off valve Mishimoto aluminum rad (RX7) Mishimoto twin electric fans Mishimoto couplers/rad hoses Vibrant intercooler Custom intercooler piping Custom cold air intake Eprom ECU Other Performance Stuff: Quaife LSD Wilwood big brake kit Custom strut bar Custom drive shaft Triumph TR8 spyder rear brakes Triumph TR8 rear differential Koni/Spax suspension Custom 3" exhaust off of turbo Pacesetter exhaust tips Walbro 255lph fuel pump Magniflow mufflers Polyurethane bushings Electronic Stuff: Custom carbon fiber dash Autometer Cobalt/Cobalt digital gauges -multistage shift light with rpm -speedometer -tachometer -boost/vacuum -fuel level -voltage -water temp -fuel pressure AEM wideband gauge HKS turbo timer type-1 Pioneer head unit Energy 5 ¼ component speakers Kicker flat sub/enclosure JL small class d amp Sony Xplode amp for speakers Custom blue interior neon Custom carbon fiber switch panel Compustar alarm/door locks Luminia HID kit 10000K Projector fog lights Other Stuff: Custom suede/yellow ...



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I built this in my spare time in an afternoon. I had an old DVD writer that I dismantled to pull the laser diode out of (you can find other videos on Youtube showing how to dismantle the DVD writer). I had bought a couple of 10mW laser modules for $6.95 each a year ago and hadn't made use of them yet. They were perfect for this as they had their own heatsink already and a nice focusing lens and the same diode package as the DVD writer so just popped the 10mW one out and press fitted the replacement diode in. Rough estimate of 300 mW based on 300 mA and 3V for the laser which is 900mW total power and assuming 30% efficiency. Believe red laser diodes have around 50% efficiency but this is an old unit. Will test it with a photometer I have at the office later. Takes less then 2 seconds to burn through a plastic CD case. The aluminum case works as a heat sink for both the laser diode assembly and the LM317T driver. If doing it this way be sure the LM317T is electrically insulated from the metal case with silicon or mica transistor spacers as the tab on the 317 is the output and the case of the diode is at ground, else you will short it out.



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first test with the diy motorized igus camera slider/glidetrack/dolly and timelapse photography some key components for the slider: igus rail (WW-10-80-10, WS-10-80): www.igus.de gear belt: www.maedler.de www.maedler.de motor: www.conrad.de voltage regulator: www.conrad.de further ideas: www.pocketslider.de



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Upgrading Your Alternator? DC Power Engineering IS Your Answer! www.DCPowerINC.com Kyle Is A Cool Guy Who Can Help A LOT! Direct YouTube Channel http DC Power Engineering Inc. 2011



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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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Watch more How to Take Care of Your Car videos: www.howcast.com Subscribe to Howcast's YouTube Channel - howc.st Learn to test an alternator by following these steps. Howcast uploads the highest quality how-to videos daily! Be sure to check out our playlists for guides that interest you: howc.st Subscribe to Howcast's other YouTube Channels: Howcast Health Channel - howc.st Howcast Video Games Channel - howc.st Howcast Tech Channel - howc.st Howcast Food Channel - howc.st Howcast Arts & Recreation Channel - howc.st Howcast Sports & Fitness Channel - howc.st Howcast Personal Care & Style Channel - howc.st Howcast empowers people with engaging, useful how-to information wherever, whenever they need to know how. Emphasizing high-quality instructional videos, Howcast brings you experts who provide accurate information in easy-to-follow tutorials on everything from makeup, hairstyling, nail art design, and soccer to parkour, skateboarding, dancing, kissing, and much, much more. Step 1: Find the battery Locate your car's battery, usually located on the left side of the engine if you're facing the front of the car. If it's not there, check the right side. Some cars even have their batteries under a seat in the middle of the car. Tip Consult the owner's manual for your vehicle if you can't find the battery. Step 2: Connect at the voltmeter Connect the voltmeter to the battery while the car is off. Connect the red positive wire on the meter to the positive battery terminal, and ...



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www.1aauto.com 1AAuto shows you how to repair, install, fix, change or replace a broken, cracked, damaged, slow-moving, or stuck power window regulator and motor. This video is applicable to 1995-2005 Chevrolet S10 Blazer, 1995-2005 GMC S15 Jimmy, 1998-2000 Envoy, and 1996-2001 Oldsmobile Bravada models.



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HHO Test 5 VDC @ 20A



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This gun is now for sale: I hardly used it after the tuning while moving my attention to airguns from bb. Please email me at markqian@hotmail.com if interest. Here are the modification I did on this gun: 1). Replacing the barrel with JC. This is the first modification I did. It sounds easy but not really to me when I was really new to the gun. I eventually ended up with disassembled the gun completely. The good fact was that it resulted me understand more about the gun. I have been reassembled this gun for more than 15 times. Disassembling the gun not-intentionally encouraged me go further to replace the chip. 2). Replacing the chip for full auto. This is also a hard one. After disassembling the gun, I came up with the idea of replacing the chip. It looks straight forward in the demo video but it is harder when you really do it. You could over heat a component or permanently cut out part of the circuit - I did and make it up when soldering. Warning: anything could happen after you reassembly your gun...What happened to me was the magazine was no longer working. It first kept loading as long as the power is on without stopping and eventually stop working/loading completely (lost all the power). I got it fixed by getting a chip replacement (thanks for DrozdMax.com with a free replacement). 3). Using 2 x 3.6v (close to 4v when full) + 4 x 1.5v batteries = 14v. This is the easiest task. You just need to decide what voltage you want. I don't want to get too close to the limit ...



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How to check battery voltage, alternator voltage, and load test voltage with a multimeter THANKS FOR WATCHING :) Please comment below This video is for information purposes only. If you perform these tasks, HandyManProblemFixer assumes no responsibility in your project. I have to post this Disclaimer to protect my self in the Sue happy Society we live in today.



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This video demonstrates PIR motion detector with a pir circuitry. This circuit is a home made. The circuit uses pir sensor which detects motion and amplifies the signal. relay is switched on when motion is detected,and switched off when no motion is detected. The voltage regulator used here are,7805 and 7812 ic . i had assembled this inside a switch board, and connected to the mains 250 volts. as you can see when the relay is on, and off, light is on, and off. When a motion is detected the relay is switched on. This circuit is always on when continous motion is detected. It waits for a while before switching off. again when it detects a motion it is switched on. this project was designed and developed entirely by Titoo . they consist entirely of content that titoo created himself.. completed in 5 days.



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This beautiful 21" Sony KV-2145R circa 1982 came to my workbench because it wouldn't turn on anymore. Join me in my quest of trying to bring it back from the dead!



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At the heart of this mod are the Texas Instruments PTR08100W 10A, 4.5V to 14V input switching regulator and the RC helicopter voltage display. intro music by Kevin MacLeod filmed with a Kodak Zi8 edited in Windows 7 with Windows Live Movie Maker



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All RcSuperhero planes launch like a rockets (or hand throw) and have AWESOME flight characteristics! If you would like the $19.95 PDF plans see my website www.rcsuperhero.com



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Experiments •Design of DC Jones chopper with R and RL Loads and characteristics study of Commutation and chopper Technical Specification •Input voltage 30V DC •Output Voltage 0-30V DC •Current rating 1A Features •One potentiometer is provided to vary the duty cycle •Inbuilt Power supply for Converter and triggering pulse •Inbuilt resistive Load •Power ON indication Switch •Detailed mimic diagrams are drowned to facilitate the experiments



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Here is my second video with the full description of the circuit. And yes it does charge all iphones/ipads/ipods. Supplies needed: 5v voltage regulator, two 100 ohm resistors, switch, very thin wires, altoids tin, USB port, 9v battery dock, electrical tape, 9v battery.



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My boat was reading 12.2 V at all speeds on the battery, a good sign that something is wrong, not charging. This is a 10AMP regulated system, after looking into specifics, charging should be around 13-13.5V. For motors without regulators 14+Volts is typical. Here is a test to try on a 3 wire...



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Ein Enwicklungsboard für die Mikrocontroller Mega8 und Mega32 von Atmel. Eine Befehlsbibliothek ermöglicht einfachen Zugriff auf die verschiedenen Komponenten, wie zB eine 7-Segmentanzeige oder einen Schieberegler. Die Bibliothek wurde in der Sprache C geschrieben. Ich habe für Aufbau und Planung etwa 12 Stunden gebraucht. INFO: Dieses Board habe ich entwickelt. Es gibt momentan keinen Schaltplan oder ähnliches. Sollte jemand jedoch Interesse daran haben, kann ich den Schaltplan gerne erstellen und veröffentlichen. Das gleiche gilt für den Sourcecode (Diesen kann man jedoch auch gerne vom Video abschreiben :p) A development-board for Meag8 and Mega32 microcontrollers of Atmel. A code library allows us easy access to functions like SetDisplay([number]) for the 7-segment Display or ReadSlider() to read the value of the slider. The lib is written in c. For planning and building a needed about 12 hours. info: I developped this board. Currently, there's no schematic or similar. If someone's interested, I would create a schematic and publish it. The same applies for the code. (But he code you can also copy from this video ;p) Please rate and comment! Is my english good enogh to translate my videos?



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