Random outcome on multiple devices

[Art]

It sounds like it would work.
That would be the first thing I'd try now, nice one.
.. and if not, then tapping the centre of a divider (two resistors from +ve to Gnd).
Still cheaper than timing a cap discharge.

I can't say I've tried to make two devices produce a different result,
just one device from one launch to the next.

(Never done this)

What about reading a resistor on analog pin? A high value, maybe 100K, would that produce a reasonably wide range of seeds?

Robert

Edit: since no 2 resistors are exactly alike, the voltage should vary.