16 Dec
2011
16 Dec
'11
11:21 p.m.
On 12/16/2011 05:17 PM, Tony Duell wrote:
With the combination of the room and your eyeballs acting as a
(spatial) low-pass filter? ;)
-Dave
--
Dave McGuire
New Kensington, PA
I had
previously met Sir Denys Wilkinson and he had mentioned something t=
o me about his pioneering days in nuclear instrumentation (including pinb=
all machine multichannel analyzers). When he had told me that he had inve=
nted the D/A converter I didn't really believe him but kinda nodded along=
Depends on what you mean by D-A i guess...
In one of my old books on electric lighting they suggest lighting a large
room by 15 light bulbs in a 3*5 array o nthe ceiling and controllign them
by 4 switches, thus giving 15 levels of illumination (I guess 'all off'
is not illumination :-)). THye even give the best way to arrange the
light bubls controleld by each switch, so as to get fairly evnn
illumination in all cases. I consdier that ot be a D-A.