Dave celebrates the classic 555 timer IC by building the Evil Mad Scientist "three fives" discrete timer kit.<br />Some scope measurements and an explanation of the internal 555 timer circuitry follow.<br />Construction: http://youtu.be/U6qZPx4uD0g?t=5m10s<br />Testing: http://youtu.be/U6qZPx4uD0g?t=34m35s<br />Circuit Description: http://youtu.be/U6qZPx4uD0g?t=38m16s<br />Waveforms: http://youtu.be/U6qZPx4uD0g?t=54m35s<br />Classic old Signetics 555 timer datasheet: http://serge.bertorello.free.fr/compsnts/ne555%20&%20ne556.pdf<br />The kit: http://shop.evilmadscientist.com/productsmenu/tinykitlist/652<br />Han's Book on Analog chip design: http://www.designinganalogchips.com/<br />Forum: http://www.eevblog.com/forum/blog/eevblog-555-555-timer-kit/<br /><br />EEVblog Main Web Site:<br />http://www.eevblog.com<br />EEVblog Amazon Store:<br />http://astore.amazon.com/eevblogstore-20<br />Donations:<br />http://www.eevblog.com/donations/<br />Projects:<br />http://www.eevblog.com/projects/<br />Electronics Info Wiki:<br />http://www.eevblog.com/wiki/
