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This is a little bit different question than normal..

Aliexpress is ruing my life, sometimes i order things i don't even need because it seems cool. A few time ago I ordered 500x 555 chips for just a few bucks, haven't used one.

What cool project could I do with so many 555 chips? I'm open to every absurd, stupid, usefull and non-usefull or original projects.

Maybe a predator style giant clock? https://www.youtube.com/watch?v=UyBwKHCtgm0

Or maybe just a random LED blinking matrix with nothing usefull.

Open to every suggestions :)

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closed as primarily opinion-based by Dmitry Grigoryev, laptop2d, Chupacabras, RoyC, Harry Svensson Apr 10 '18 at 20:07

Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.

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    \$\begingroup\$ How about a monochrome mosaic? \$\endgroup\$ – JRE Apr 10 '18 at 13:29
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    \$\begingroup\$ Will 500 black dots be enough to draw the 555's schematic or block diagram? If so arrange them that way on a piece of white cardboard. \$\endgroup\$ – Bimpelrekkie Apr 10 '18 at 13:42
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    \$\begingroup\$ "Aliexpress is ruing my life", okay. \$\endgroup\$ – Harry Svensson Apr 10 '18 at 17:02
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    \$\begingroup\$ StackExchange is focused more on answering specific questions than on having conversations about open-ended questions. I suspect that if you ask this question in a good Reddit community, you'll get more interesting ideas ;) \$\endgroup\$ – Kevin Apr 10 '18 at 18:33
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    \$\begingroup\$ there is at least one dedicated website made for your problem (the "what to do with 555s" problem, not the Aliexpress related one). \$\endgroup\$ – dlatikay Apr 10 '18 at 19:02
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Purchase 500 741 op amps. Then go around to schools giving the 741 and 555 away as examples of antique circuits

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My first inspiration that is somewhat silly would be to create some kind of chain reaction circuit where you press one button and then it trigger a 555 that then trigger other 555. each 555 will also light a LED to indicate where the chain reaction is occuring. That way you get your own small scale nuclear chain reaction simulator. You can play with different propagation frequencies and different arrangements. I'd set them up in such a way that you can easily switch the explosion pattern.

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  • \$\begingroup\$ Yeah, 555 dominoes is an idea! \$\endgroup\$ – Hot Licks Apr 10 '18 at 18:01
  • \$\begingroup\$ This answer likely triggered an NSA alarm. \$\endgroup\$ – Misunderstood Sep 3 '18 at 2:26
  • \$\begingroup\$ I can confirm you that I'm still alive and that NSA didn't knock at my door yet. Thank you for your concern \$\endgroup\$ – Simon Marcoux Sep 3 '18 at 2:39
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555 earrings

enter image description here

Figure 1. These are FIN05 / 5640 earrings that were available on Etsy but they're out of stock.

There's a gap in the market. Go for it!

How quickly can you make them? (Timing is everything!)

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  • \$\begingroup\$ +1 for "Timing is everything!" \$\endgroup\$ – Mr.Mindor Apr 10 '18 at 20:16
  • \$\begingroup\$ What does "FIN05 / 5640" mean? \$\endgroup\$ – Lynn Apr 10 '18 at 20:39
  • \$\begingroup\$ I have no idea. It's what's printed on the chips. Have a look on the Pinterest page where I found them. There's enough resolution if you zoom in. I was wondering if someone else could identify them. \$\endgroup\$ – Transistor Apr 10 '18 at 21:10
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To save some money, next time buy components without the corner hole to screw it on a PCB / proto plate, but use one or more 555's and glue your component on top of the 555. Just to use them as kind of spacer.

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  • \$\begingroup\$ smd dead bug protoboards? \$\endgroup\$ – PlasmaHH Apr 10 '18 at 13:47
  • \$\begingroup\$ I actually meant DIP8 555's. I used them one time to stick a component on top of a breadboard. Like placing a 555 normally into a breadboard (make sure the pins are not creating problems for the 'real' circuit. And instead of glue I put an elastic under the 555 and around the component which was 'placed' on top of the 555. Worked quite well as temporary solution. \$\endgroup\$ – Michel Keijzers Apr 10 '18 at 13:50
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One NE555 contains 25 transistors (some sources say 24). That's giving you the solid number of 12500 transistors, which is more than in a Z80 microprocessor at ~8500. If they were neurons, you'd have the vast computational power of a sea slug brain at your disposal.
So don't expect your 555s soldered together on ~500cm² of PCB, each with their own old-style 100nF cap next to it, to develop a consciousness, but a Turing machine should be doable. At least you won't need an external clock.

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