The internet is full of nice stuff, including this pummer pdf (orig link via oreilly)
a quite simple ``light soaking at daylight, blinking at night time'' device.
very nice is that the blinking is more a flash followed by a dimmed lighting before switching off.
some devices standing together seem to communicate together when the daytime fades.
and it's easily put together:
the circuit from the makezine article.
about the sn74hc240 logic chip here in duty.
|here the both pummers built first|
(guess, which one is bert ;)
and here a dual LED version. i really like the look with the rusty 3.5" adapter:
|another nice one simply glued to a bent i/o shield.|
Some links about pummers:
• many sources at Google images
• to the beam wiki (www.beam-wiki.org)
Have fun, blink blink...
• back to bertnase.de