Pummers and Things That Flash
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Description: A pummer is basically just a flashing LED with
a decay value. This simply means that the LED turns on fast then softly
fades away.
I have built a fair amount of pummers, the ones here were
just handy in my apartment to take pictures of. I have given about 6 away
as gifts, left another 12 at my old home, have 7 at my new home, built about 8 prototype pummers
for Solarbotics, then finished another 50 Solarbotics hex pummer kits for
sale. That's up till about 2002 and I still like building them...
I really like pummers, they are quiet, aesthetic, run by
themselves and have an operational life in the years. I have a few that
are approaching 4 years old that are still going. Mark has a few at his
place that are
well over a decade old and still working!
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Build Date: June 18, 2003
The smallest pummer I have built to date. Used as many SMT components as
I could. Powered by 5 SCPD's and using an SMT 74HCT240, the pumm cap is
100uF.
Top picture shows the pummer sitting on a quarter for size comparison.
Middle picture shows pummer in a bottle...
And bottom picture shows the pummer beside the soldering iron I used to
build it.
And yes it really works.
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Build Date: Jan 23, 2003
Not really a great looking pummer, just trying to fit this in a nice
small container. Hidden beneath the circuitry is a powerful rare earth
magnet so that this can basically be stuck to anything made of nickel,
cobalt or most importantly iron.
This uses a newer high efficiency pummer type circuit, the large white
LED will flash for about 2 hours and the smaller red LED will flash for
about 10 hours and that's on a single 1F cap. That sure beats the 45min max
that the first generation circuit gave, and its such a small change too its
another one of those "why didn't I see it before!" type of things.
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Build Date: Aug 18, 2002
Just a quick little bright blue pummer.
Uses a SC2433 solar panel and a pair of AAA nickel metal hydrides for
power storage. This little guy will easily run all night, on a decent days
charge. Built as more of a test using the NiMH batteries instead of the
usual Ni-Cads. Given the choice I still prefer Ni-Cads.
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Build Date: July 20, 2002
LED
color: Blue, Red
This is a Pummer that I built for my cousin Brent.
This uses a pair of AAA Ni-Cads for power and a SC3766 to charge. I used
a 10% duty cycle for better efficiency and longer battery life. The main LED is a bright blue that
is filed flat to give a nice pinpoint of light. This one also has a small red LED that can only be seen from the
back.
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Build Date: Aug 5, 2002
Hmmm this one has a bit of a
story...
I went to the AAAI conference in Edmonton in July, there were these
flashing buttons from NASA AMES research sitting on a table for free, I
took a couple and proceeded to hack one into my name tag with my multitool
while watching the botball competition. When I got home I converted it
into a solar power blfnar, you can also set the frequency of the flashing
as well by adjusting the yellow thing pointed out the side.
I also made a similar one using a ultrabright green LED for Dave to
thank him for taking me along, Thanks Dave!
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Build Date: 2001
A white LED Pummer that uses a
hard drive platter spacer as the "frame". Not really an original
idea, I saw a few at MarkT's place and for fun built one.
This runs off of a 1F 2.5V gold cap charged by a SC2433 solar
panel.
Will run for about 2 hours on a good charge.
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Build Date: Aug 2001
A solar powered laser pointer, not a pummer but still the same basic
category. Pair of 1/3 AAA batteries being charged by
a SC2422 cell. |
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Build Date: Aug 2001
Pummer built from a chunk of crystal that I acquired in New Mexico. I
drilled a hole in the bottom for the LED so that it is actually imbedded
inside, flashes a very bright green actually
see for yourself (1.9MB).
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Build Date: Jul 2001
A small triple LED pummer that uses a pair of coin cell Ni-Cad
batteries. The three small red LEDs are all in parallel so that they all
flash at the same time. The coin cells will usually run this for the whole
night.
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Build Date: Jul, 1999
A dual pummer but the second LED is located near the bottom so it lights
up the base. An older pummer built during one of my first pummer building
binges. All exposed steel is rusting, gives it an interesting
retro-futuristic look, still I tend not to use much carbon steel anymore. |
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