I received my package of LED’s in the mail today from goldmine-elec.com. Quantsuff emailed a link to their sale on the Nichia NSPB633 blue oval LED (it might say NPSB, but that’s a typo). They are on sale for 100 for $10. I ordered some and I have been playing around, err, experimenting with them
(Read More…)
Background: I should explain what I’ve been considering. My door has southern exposure so I would like to put a solar cell on it along with a long-running joule thief. The LED will be pointed at the keyhole in the lock. During the day the solar cell will charge a supercapacitor and run the Joule
(Read More…)
A comprehensive biography of Leo Fender can be found on Wikipedia. I went over to the local cemetery and paid my respects to the inventer of the famous Fender guitars. I can’t think of much more to say; his guitars say it all.
Quantsuff reminded me of his Hak Light in an email. I haven’t visited his web page in awhile so my memory needed refreshing. I checked it out, and I thought about another use for his circuit. At the dollar store, they sell (when they’re not out of stock) the CR2032 or CR2025 coin cells on
(Read More…)
One of Xee2vids videos is how to make a monopole magnet. It shows 2 south poles of the magnets and the magnetic lines converge inwards. I remember seeing this in textbooks and it’s shown that magnetic lines of force from two like poles diverge away from each other. That’s the opposite of how it’s shown
(Read More…)
A few months ago I came across a 7 Year Joule Thief video from Xee2vids on YouTube (link below). It’s a conventional Joule Thief except that the resistor has been increased to 2 megohms, and a 100 pF capacitor has been added from the resistor to ground. He calculates that the LED should run for
(Read More…)
A .TXT file I had from 2009, probably from my late great Watsonseblog. If it had a pic attached, I’d like to add it, but I’m unable to determine what picture. Joule Thief using Air Core Inductor – Feb 13, 2009 I saw Quantsuff’s Valentine’s Day Flashing Heart on Instructables and it inspired me to
(Read More…)
Olde Limerick: A young dilettante of the arts Gathered together the finest of parts; But he failed to check whether They fitted together; So now he has the flute that shoots darts!
The postman brought me a package today and I opened it up. I was surprised to find the thing I’ve been waiting for for almost a year. It’s a potential to kinetic energy converter – the Gravity Light. I got to work and assembled it and hung it from the eaves outside. I filled the
(Read More…)
I bought some LT-1073 DC to DC converter chips from Digi-key for about $4.00 apiece. I’m going to try to make something small to power 9 volt radios and other devices. It will use a 1.5 volt AA cell for the input battery. The switching transistor is on the chip so the only parts that
(Read More…)
