Hopefully, enough voltage is developed across R5
that will turn the LED on sufficiently. That may need
some tweaking. Also, R1, R6, and R9 can be adjusted to
get interesting interactions from the oscillators. I haven’t
actually done this, so I’m not too sure how it will look.
If anyone out there tries it, let me
know how it goes.
Another approach to this — and
what I expected to find out in the
world before I looked — is to build a
Lorenz attractor. This chaotic system
oscillates around some fixed point,
but does it with chaotic behavior
that is seemingly random. It’s called
a strange attractor because the
chaotic behavior appears as though
it is attracted to a fixed point.
There’s a circuit for one at
the Harvard University physics
department website at http://users.
misc/ lorenz.htm. Unfortunately,
the circuit — while pretty simple
mathematically — requires a lot of components. If I were to
try the microcontroller approach, I’d give this a go.
It should be relatively easy to implement a discrete
version of the relationships in software. It would be fun to
try to use this kind of system to make a chaotic flickering
LED and see if it looked better to your brain. NV
n FIGURE 5. Possible flickering LED implementation.
January 2018 15