555 Roulette Wheel

Description

I found this circuit on 555-timer-circuits and I had to make it!

I was looking for things to do with my stash of 555s when I found this fun little roulette wheel. I think it would make a neat interactive badge.

Then I found this video that explains it amazingly well:

O Fortuna!
kristina panos • 12/29/2019 at 13:42 • 0 comments

Got them working in circle format. Now I that I've verified the spin order, I can redesign that PCB. 😬
Fritzing around with vias
kristina panos • 12/28/2019 at 13:55 • 0 comments
Yesterday I went from
- drawing my PCB plan out on the whiteboard, to
- thinking it would be nice if I knew what I was doing enough to put some components on the back, like the coin cell holder at least, to
- figuring out how to do it in Fritzing. Crazy! I've made my via bed and now I must lie in it.
It moves!
kristina panos • 12/28/2019 at 00:57 • 0 comments

Isn't that Jell-o cube LED awesome?
I have no idea why it takes so long to slow down and stop. It wasn't doing that earlier. The suspense may kill you.
Breadboarding and resistor substitution
kristina panos • 12/26/2019 at 23:37 • 0 comments

I've breadboarded this up and it sort of works. I think the problem may be the extremely short leads on my 1uF cap, or else the fact that I don't have any 3.3MΩ resistors and substituted with three 1MΩ resistors in series. I do have six 100kΩ to make up the .3 on each, but I worried I wouldn't have the room. Time to rewire!

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Mike Szczys wrote 01/06/2020 at 22:08

That's some sweet spinning action. The slow down is quite satisfying!

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