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555 timer monostable mode https://youtu.be/srBVqhfL1ns 555 timer astable mode https://youtu.be/Apsg2Sf9oAA How I set up the Sainsmart DSO note 2 pocket oscilloscope to measure DC output of 555 time https://youtu.be/cv0-vGk8GsA Step by step build and explanation of a 555 timer bistable mode (flip flop) circuit. https://www.amazon.com/shop/electronzapdotcom for links to where I bought most of the things I use in my videos. Electronzap earns money from this storefront. https://www.patreon.com/electronzap If you'd like to support my efforts directly ... https://www.youtube.com/watch?v=n05_tQIqEm8