[sdiy] my annual DIY holiday project

[harrybissell]

well I assume that you are not serious... but

If you used MANY phototransistors you will not
need the colored acetate.

If you used three (RGB)... you will sense almost nothing
as the 'odds' of 50 lights (of the same color) being mostly
'on' or 'off' at the same time are about zero.

I made a display in college that used four 120V lamps, with
'flasher buttons' inside a large plastic globe. even with four
lamps it was RARE to have all off at the same time...

rare and FREAKY if you were walking around at the time...

(the display was called 'harry's brain' by the residents)

H^) harry   (lights are out more often now...  ;^)

David Cornutt wrote:

> What kind of chaos does 150 blinking lights produce?
> Get a bunch of phototransistors, put different colored bits of
> acetate over each one, run them into opamps, and use the
> outputs as control voltages. :-)