cimo

URGENT: Random light circuit

6 posts in this topic

Hi

I am looking for more advice for a simple project: the circuit should light up 4 ultra-bright LEDs randomly, that s it, maybe being able to change the way it behaves would be nice as well..

tx

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Ah alright, so you need more randomness for a single light.

I would take a microcontroller (can be a real small one) that outputs a pseudo random pulse train, e.g. with a linear feedback shift register algorithm (LFSR)

Building a LFSR with discrete logic is too complex/expensive.

Using a discrete true random generator (example) is a bit easier to build, but it wouldn't give you enough control about the effect (and this was your request)

Best Regards, Thorsten.

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two NE555 (556) and a "AND" gate or something?

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