Tutorial: 555 Timer, PWM LED Driver and Latched Switch - Pt1

View all my tutorials and videos: https://www.youtube.com/user/mjlorton/videos?live_view=500&flow=list&sort=dd&view=1 ------------------------------ Click "Show more" ------------------------------------------- This is a tutorial on the 555 timer and demonstration on how it works as a PWM LED Driver and Latched Switch. This is also a follow-up to "A Look Inside #6 - Kelty LumaTech Cree LED Lantern" http://youtu.be/gopsOieG7ws In the demonstration I need to look at a leakage / quiescent current to see if it can be reduced. Topics coved in this video: * Some background and history on the 555 timer. * Pin layout and description of the 555 timer DIP IC * Explanation on how the comparator op amps work inside the 555 timer. * Explanation on how the RS Flip Flop works and the its logic * An explanation and demonstration of the 555 timer as a latched switch. * An explanation and demonstration of the 555 timer as a PWM (pulse width modulated) LED driver / dimmer circuit. * A look at transistors and a Darlington pair. * A look at how we can improve the quiescent / q-point current of the circuit. * 555 timer tutorial * Monostable and astable multivibrator ------------------------------------------------------------------------------------------------------ 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 - http://www.youtube.com/MJLorton My Techie Amazon Store: http://astore.amazon.com/m0711-20 My other channel VBlogMag - For almost any topic under the sun! - http://www.youtube.com/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=QmhzQjcxYjVlc1E9&afid=bFcwbzliNzVDc289&ats=K2EyUjZNTDh3UTA9 - Test Equipment and Test-meter suppliers and http://www.calibrate.co.uk/?cmid=QmhzQjcxYjVlc1E9&afid=bFcwbzliNzVDc289&ats=S3Yxd2tOMjVISzA9 - Calibration and service of test equipment =================================================== $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ Bitcoin (BTC) Donations: 1K7PeF55e7ssE7W3WVCoa7c4j2PHzy6ASv $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ ********************************************************************************** Music clip from Youtube Music Library - Phase Three by Huma-Huma **********************************************************************************