A different approach to flashing payout lights. no programming

[Corrupt_rev]

While not thought through completely, here is another possible solution:

4017.jpg

It makes use of the clock inhibit input. A high on the reset and clkinh pins will keep the chip in a state of reset. When you trigger the one shot, those pins will go low, allowing the clock to cycle the LED's. The adjustment on the clock sets how fast the LED's flash, the adjustment on the one shot sets how long they flash. If you use all 10 outputs, including the carry and not including the 0, you don't need the diodes.

BTW, if you want more brightness, you'll need to add driver transistors to each LED. According to the datasheet, that chip is only rated to source or sink 1 mA.

Best of luck to you!

Ooooh. I like this solution!

So instead of the monostable(one shot) controlling the astable(clock pulse), the mono controls the 4017? Love it!

I do remember thinking about doing something similar when I first approached the project, but my brain got locked into the monostable>astable route for some reason.

I think my brightness issue was due to the npn not allowing a fully open ground path for the LEDs. This will solve that issue.

Giant thanks!! I'll try to get this hooked up today and reply with results.