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EEVblog #555 - 555 Timer Kit

EEVblog

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  • Recommended by 2 people: 2 on Hacker News.
  • Presented by Dave Jones, host of EEVblog

Intermediate. Assumes working knowledge.

370K views12 years ago2 recommendations

HardwareElectronicsEmbedded systems

Dave Jones builds a discrete-component 555 timer kit, tests it with an oscilloscope, and explains its internal transistor-level circuitry.

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

Why it's here

2 people recommend this

What people say. Engineers recommend this video for its excellent, deep-dive explanation of how the classic 555 timer works at the transistor level.

spectramaxon Hacker News • Recommends

On “How to Read a Schematic”

I totally agree with you. There is a deeper problem I think across the board, whether it is electronics books or programming tutorials, mechanical engineering, etc. For example, no one teaches you the way you see in this particular segment of an old EEVBlog episode 1. Please watch this clip as Dave dives deep into how a simple 555 chip works at the transistor level, breaking down into modules and explaining how each module works. What we need is a book that does the following: Break down REAL circuits from the wild, explain each module in isolation, then explain how it fits into the larger system. No one does this, not in my 15 years of experience in engineering. It is the same everywhere…

okketon Hacker News • Recommends

On “The 555 and How It Got That Way”

Don't miss the #555 Episode of EEVBlog where Dave Jones solders this kit and talks a lot about how the 555 works its history: link to this video

cogburnd02on Hacker News • Mentions

On “To elaborate on why open-source hardware is hard”

> You could have an open replacement for e.g. the 555 There is already a kit 1 for a 555-like circuit (I think Dave 2 says there's some reason it can't be used in place of an actual 555) made of discrete components. But there's no indication that it's Open Hardware, though. :-( 1 link 2 link to this video