LM317T Voltage Regulator with Pass Transistor

Founded in 1983, Yu-Sheng Electrical Enterprises Co., Ltd. is a manufacturer in the heavy electrical industry. With the products sold as important public works and project equipment and power equipment in Taiwan and around the world, the company has earned high reputation and popularity. The company has obtained the ISO 9001:2008/CNS 12681 quality certification of the Bureau of Standards, Metrology and Inspection, MOEA, and is a heavy electrical manufacturer registered as a "trademark" of the said institution. Since inception, "Yu-Sheng Electrical" has developed reliable power equipment to meet the demand for stable power in every country. In response to worldwide market needs, a branch was set up in Kunshan City, Jiangsu, China in 1999, and a factory was set up in Yixing City, Jiangsu in 2005.With the rapid and flourishing development of the high-tech industries worldwide, the development of various types of precision machines and equipment has expanded in scale. Relative to the precision mechanical equipment and processes such as IC semiconductor, CNC machines, precision laser cutting, EMS, PCB production equipment, PLC program control, microelectronics production, SMT, computer automation, etc., the high-tech industries' massive use of computer and precision equipment has led to power and voltage equipment's high sensitivity to power and voltage changes because excessive changes in the voltage are likely to result in abnormal operation, breakdowns, and even frequent ...



http://www.youtube.com/watch?v=7x7lXtlXWWk&hl=en

Homemade Power Supply This is also good for voltage regulation/stabilization of some "green energy" voltage sources that may fluctuate/vary a bit and you need a stable/steady voltage souce for a project. I will put more text here soon, and check often. The LM317 chip allows for a low number of parts (maby 7 parts, plus cords and.or boxs) to be required to make a fixed or variable voltage/power supply. There are similar chips and I will try to put some numbers up. The chip itself is fairly large - this is not a small IC chip that is difficult to handle , and there is only 3 large terminal pins that are easy to access and work with, and a hole for the screw/heatsink if used. For the power supplies in the video, the chip is rated at about 1.25V to about 25V and 1.5 Amps of Current. There are some LM317 versions that will allow more or less current also. You can get just about all the parts at Radio Shack, but their prices are high it seems. Radio Shack is good if you need something right away. You can order the LM317 IC chip from major suppliers, and on Ebay for a deal - some already heat-sinked on a board and ready to go. If you can pick up several at a time to save on shipping, etc. They are only about $1 US now. You can even use machine screws or speaker-jack screws for the input and output terminals. Radio-Shack also does have some nice electronic "kits" with easy hook up springs for the wires. These are the popular "100 in 1" or "200 in 1" , or "300 in 1" type kits ...



http://www.youtube.com/watch?v=p-z-ap8gtyA&hl=en