Date 2017-01-12 Link to Experimental Joule Thief
There are many circuits that are used infrequently that are powered by the usual 9 volt battery. One of these happens to be a field strength meter (FSM), which is used for detecting the power output of a transmitter such as the one a radio amateur uses. Some FSMs are very simple and use no
(Read More…)
I designed my Blue Blinky with a daylight shutoff, using a LED as the light sensor and an additional transistor to amplify the minuscule current that the LED puts out. This worked just great because there is the point across the timing capacitor where the current is very low, and it takes very little current
(Read More…)
I found this on YouTube. It has no resistors, no capacitors, just two transistors and two inductors. And and a 1.5V cell and LED of course. I redrew the topsy-turvy schematic that was shown at the beginning. It was confusing with the minus on the left and plus on the right. It makes more sense
(Read More…)
Merry Christmas! Happy Holidays, too. I found this article, to my surprise, in a summer issue of Pop Sci magazine. I was surprised because when it came to mainstream media, I thought that the Joule Thief was a best kept secret; hardly anyone other than ‘techies’ knew about it. But here’s proof otherwise. I think
(Read More…)
It’s been awhile since I blogged this, so I may be saying what I’ve already said before. But I get comments from others about how to make measurements of the LED brightness. A recent one is in the comments of an older blog. Many Joule Thief builders don’t have the minimum tools needed for some
(Read More…)
