DIY Bench Power Supply: #1 - Output Switch

----------------------------- Click "Show more" ------------------------------------------ In this series we are going to go through the design and build process of a variable bench power supply. In this video we take a look at my college power supply as this will form the basis of the design. Improvements to the design will be an output switch, initial current setting without dummy load, both coarse and fine voltage / current adjustment. I use the oscilloscope to view the switch on / ramp up / slew rate of the power supply switches. Future videos in this series will cover: "soft" output switch design, power supply design, enclosure / case design, printed circuit board (PCB) design and manufacture, analog and digital display options for current and voltage, breadboard to PCB design with DesignSpark by RS Components: http://www.designspark.com/ Thanks to Tiaan for his "relay contact bounce" post: http://www.eevblog.com/forum/projects... ------------------------------------------------------------------------------------------------------ My website and forum:- http://www.mjlorton.com Donations and contributions:- http://www.mjlorton.com My techie channel MJLorton - Solar Power and Electronic Measurement Equipment -    / mjlorton   My Techie Amazon Store: http://astore.amazon.com/m0711-20 My other channel VBlogMag - For almost any topic under the sun! -    / vblogmag   My VBlogMag Amazon Store: http://astore.amazon.com/vblogmag-20 ------------------------------------------------------------------------------------------------------ =================================================== Video sponsor, Pass Ltd - their websites: At checkout use the discount / promotion code "mjlorton" for 5% off. http://www.tester.co.uk/?cmid=QmhzQjc... - Test Equipment and Test-meter suppliers and http://www.calibrate.co.uk/?cmid=Qmhz... - Calibration and service of test equipment =================================================== $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ Bitcoin (BTC) Donations: 1K7PeF55e7ssE7W3WVCoa7c4j2PHzy6ASv $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ ********************************************************************************** Music clip from PatternMusic by Richard Lawler www.PatternMusic.com (used under creative commons Attribution-ShareAlike Unported 3.0) http://creativecommons.org/licenses/b... **********************************************************************************