Someone brought up an assignment for electronic dice. I did something similar while I was in college just for the heck of it, it wasn't an assignment. I used TTL gates.
30 years later I was thinking about it after viewing that thread and another way occurred to me. My mind tends to work that way, solving problems where there aren't any.
Anyhow, here is my concept...
All the circuit needs is a VCO oscillator that runs when a button is pressed and slowly slows down to a stop. My original concept wasn't as random as I would have liked, I suspect a link between the power supply, oscillator, and number of LEDs lit.
Since the 4017 doesn't have any drive I kept the LEDs at 3ma. This means an output can have 9ma drive max. Not the best design, but the 4017 can handle up to 16ma.
I didn't post this on the other thread because it was a homework assignment. If the poster finds this thread I will call it research on his part and let him have it. However, this is my thread, just like the other thread is his.
30 years later I was thinking about it after viewing that thread and another way occurred to me. My mind tends to work that way, solving problems where there aren't any.
Anyhow, here is my concept...
All the circuit needs is a VCO oscillator that runs when a button is pressed and slowly slows down to a stop. My original concept wasn't as random as I would have liked, I suspect a link between the power supply, oscillator, and number of LEDs lit.
Since the 4017 doesn't have any drive I kept the LEDs at 3ma. This means an output can have 9ma drive max. Not the best design, but the 4017 can handle up to 16ma.
I didn't post this on the other thread because it was a homework assignment. If the poster finds this thread I will call it research on his part and let him have it. However, this is my thread, just like the other thread is his.
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