555 Roulette Wheel

I'm picking this back up, but my PCB design is in a sorry state, and I'm rusty on the circuit anyway. So my new plan is to build a perfboard version first, and then go back to PCB design.

So far I have collected nearly everything, but I can't find my chip tubes. I'd rather not take my breadboard circuit apart until the perfboard one is finished, because it's too darn fun to play with. But if I can't find my tubes, I might have to.

I don't know why I walked into the woods on this one. But I took enough time off from looking at it that when I looked at it again, I discovered that all the LEDs were wired incorrectly. Now it's been another four months or so since I looked it over. Wonder what I'll find this time?

Got them working in circle format. Now I that I've verified the spin order, I can redesign that PCB. 😬

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.

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.

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!