Tutorial: 555 Timer, PWM LED Driver and Latched Switch - Pt3 - YouTube mjlorton

View all my tutorials and videos: https://www.youtube.com/user/mjlorton... ------------------------------ 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 Electronic parts to get started playing with the 555 timer circuits: http://astore.amazon.com/m0711-20?nod... CSS555 Programmable 555 Timer: http://www.customsiliconsolutions.com... TS555 Low power single CMOS timer: http://www.st.com/web/catalog/sense_p... An Advancement in Micro-power 555 Timers http://blog.customsiliconsolutions.co... The 555 timer. A chip so versatile that it has been used in everything from toys to spacecraft. A chip that can act as an oscillator, a schmitt trigger, PWM driver, a siren/alarm, a light or dark detector, and much much more. It is the most popular IC of all time having been around since 1971 and now selling over 1 billion annually. http://www.instructables.com/id/Build... ------------------------------------------------------------------------------------------------------ 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=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 Youtube Music Library - Phase Three by Huma-Huma **********************************************************************************

Tutorial: 555 Timer, PWM LED Driver and Latched Switch - Pt3 - YouTube
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Science & Technology	Upload TimePublished on 4 Mar 2014