LM317T Voltage Regulator with Pass Transistor

Fixed or adjustable 3 terminal linear voltage regulators design cinsiderations.



http://www.youtube.com/watch?v=Wu8AoIDg0Js&hl=en

Bridge rectifier is an electronic component which converts an input AC current into a DC current as an output. Electronic devices, and particularly portable electronic devices such as portable computers, cellular phones, and personal digital assistants (PDAs) typically make use of alternating current to direct current adapters (AC adapters) either as a direct source of power, or as a source of power to charge on-board batteries. Bridge rectifiers are used to rectify current output from alternative current sources, such as an alternating current generator. Three-phase bridge rectifiers have been provided for rectifying a three-phase alternating current to convert it to a corresponding direct current. The rectifiers generally comprise a three-phase rectifier circuit including six three-phase bridge-connected diodes and a smoothing capacitor connected between DC output terminals of the rectifier circuit. The six pulse bridge phase controlled rectifier is a widely used type of solid state power converter which is used in industry for converting a three phase ac input voltage to a variable dc voltage. The six pulse bridge phase controlled rectifier uses six thyristors as controllable power devices. Bridge rectifiers for motor vehicle alternators generally include two metal parts used as heat sinks that are electrically insulated from each other. The Bridge Rectifier When four diodes are connected as shown in figure 4-8, the circuit is called a BRIDGE RECTIFIER. The input to ...



http://www.youtube.com/watch?v=1pwBmGy9sz0&hl=en

According to FEMA electrical fires kill almost 500 people and injure over 2000 more. Most are caused by poor maintenance of electrical appliances, incorrectly installed wiring, overloaded circuits and extension cords. The holiday season is quickly approaching when we all start to decorate and use our electronics more heavily. In fact, I have already seen Halloween decorations in many neighborhoods. This is a very relevant topic as December is the most dangerous month for electrical fires. I have made 3 quick tips that you can try that could protect your precious electronics and perhaps even your life. 1) Don't Daisy Chain Power strips This is more common than you think. Daisy chaining power strips is when you plug one power strip into the other. I'm not sure why but most people feel comfortable doing this but it is a bad practice. Daisy chaining results in a spread of the potential surge overload across both strips evenly. Where an overload of X size would trip one power strip, when two are connected 2X the overload is required to cause a trip to occur and so on. In short this practice puts everything you plug into the power strips at risk. It's just not worth it when a good quality extension cord can solve the problem. 2) UPS for Desktop Computer Power surges and brown conditions can burn out computer power supplies and even cook the computer all together. At minimum a new computer power supply is around $100 to replace and if your computer gets fried, well then there's ...



http://www.youtube.com/watch?v=JjE14njZ9cc&hl=en

DC Power supply 5 Volt regulated, bridge rectifier used with voltage regulator for fixed voltage DC output



http://www.youtube.com/watch?v=E1o5UPLb5vk&hl=en

I'm Bill and these are the electronics I'm currently working on. This is a KITT scanner as seen on the front of the Knight Rider car which will eventually be on my 2004 Impala and an adjustable voltage regulator.



http://www.youtube.com/watch?v=iAk4XSwQjHc&hl=en

4 leds, light up one after another, from left to right, one at a time. Components used: external power supply connected to 5V voltage regulator IC "7805", "555" timer IC, stadart logic IC's -- "74253" (8 D-type flip-flops), "7408" (AND gate) and "7404" (NOT gate), 5 leds (one is connected directly to the timers output, to make the clock signal visible), a few resistors and capacitors.



http://www.youtube.com/watch?v=-pS0JrSZ1JI&hl=en

It is important to align the alternator when reconnecting the vehicle electronics. Learn how to reconnect the electronics to the alternator in these free auto repair video instructions featuring a certified mechanic. Expert: Nathan McCullough Bio: Nathan McCullough graduated from Nashville Auto-Diesel College with a GPA of 3.5 and received their Craftsmanship Award and Honor Seal. Filmmaker: Robert Rogers



http://www.youtube.com/watch?v=JgwXrKbpMgg&hl=en

We caught up with Jay Leboff and talked about NRG Dock Personal Solar Solutions @ nrgdock.com. This is the first green solar product I have seen that is specifically targeted at re-charging your portable devices. The idea for the product was hatched after he was without power during a storm for several days and needed a way to recharge his cell phone and other portable devices. This product line works with those in rental units or who own a home of their own very clean and slick this is probably one of the most innovative solar products I saw at the Consumer Electronics Show 2008 From their website "NRG Dock's® photovoltaic cell charges its power station, storing energy for whenever you need it. NRG Dock's® regulator ensures the proper voltage for powering and/or charging personal communication devices - including laptops."



http://www.youtube.com/watch?v=vZP39wZqOyI&hl=en