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JJ Folderol
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And the next meetup will be....
5 Replies

Saturday, March 07, 2015At:Epoch Coffee on North Loop in AustinContinue

Started this discussion. Last reply by Silver Cade Mar 7, 2015.

Spring Find

I found this at my local Tractor Supply Co. Store for about $9 and figured I'd pass along the info.…Continue

Started Oct 9, 2013

Sometimes it's just not quite right...
2 Replies

Here's the first pass mockup of a gravitational anomaly detector.  It's going to take some refining before it's ready for use.…Continue

Started this discussion. Last reply by JJ Folderol Oct 9, 2013.

March 2013 Schedule

02Mar -- Texas declared its independence from Mexico (1836). 03Mar -- Zilker Park Kite Festival 05Mar -- Multiple Personality Day --  Get in touch with your inner selves...07Mar -- Bluebonnet…Continue

Started Feb 20, 2013


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More Infrared...

Today's small test demonstrated that the IR frequencies I'm working with pass through common window glass quite freely. 

Quite useful, since my DIY pass filter is rather flimsy and would require a supporting substrate.

Posted on August 31, 2012 at 7:08pm

Infrared experiments

I've been experimenting a bit with using infrared (IR) phototransistors and LEDs as a proximity detector circuit for a possible future project.

The test circuit is a simple one but adequate to test the parameters I was curious about: waving a hand over the…


Posted on August 25, 2012 at 8:58am



If you're looking for LED flashers and such for a project, visit flashingblinkylights


These guys have EVERY trashy plastic LED piece of crap the Chinese have ever built -- quite impressive in a perverse and twisted way.


I've recently ordered 5 pieces of a multi-color LED flasher module…


Posted on May 3, 2012 at 11:44am

Fuji Disposable Camera Flash Type 3

Just sort of archiving this here....




Posted on July 31, 2011 at 12:46pm

Igor! More Power!

I've been playing with the flash circuit from a single-use camera, and after reverse engineering the circuit I've begun making some changes.

The standard design uses a blocking oscillator running on a 1.5 volt AAA battery to produce 300 volts across a large capacitor. The capacitor is then discharged through the itty-bitty flash tube in about 1/1000 second.

After some modification (removing the big capacitor, flash tube, and trigger circuit) and adding a…


Posted on July 21, 2011 at 6:30pm — 1 Comment

Concept: Absinthe Snow Cones?

Valid concept or mildly insane?

Posted on July 3, 2011 at 1:07pm — 2 Comments

Latest Activity

JJ Folderol replied to JJ Folderol's discussion And the next meetup will be....
"Sorry, I couldn't make it and it seems none of the regulars will be attending. Awkward timing.  We were there last meetup and will most probably be there next time. See you next time. JJ"
Mar 7, 2015
JJ Folderol posted a discussion

And the next meetup will be....

Saturday, March 07, 2015At:Epoch Coffee on North Loop in AustinSee More
Mar 3, 2015
JJ Folderol replied to JJ Folderol's discussion Sometimes it's just not quite right...
"Here's what it looks like with a cheap clock module installed.  (Plastic = Evil) Now I need a battery for it, but I think I can whip up something temporary with a potato and some nails... JJ"
Oct 9, 2013
JJ Folderol posted discussions
Oct 9, 2013

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