A different approach to flashing payout lights. no programming

[Corrupt_rev]

While waiting for a part to arrive for my model B, I began working on the flashing LED circuit for it.

I knew I wanted sequentially flashing LEDs. My model B has the round lenses on the right side of the play field and it would be perfect for this.

I knew how to make a sequential flasher, but I wasn't sure how I was going to activate it. Enter the 556 dual timer IC.

All I needed to do was set up two timers. The first as a monostable that would act as a pulse lengthener, and the second as an a-stable to provide the clock pulse for the 4017 decade counter.

I figure it must be a cold day in hell because it not only worked, but I got it going on the first try!

So, here's a video showing it in action along with me stumbling through a commentary trying to explain how it works.



After I fix the little issue I mentioned in the video, the next step will be making the printed circuit board and installing it!

If anyone's interested, I can post the schematics as well.