Timeline for Do power inductors having an aluminum winding (or a light weight winding) exist?
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
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| Jun 12, 2023 at 1:03 | comment | added | MicroservicesOnDDD | It's about efficiency, brightness, and more complete usage of dead cells (or regular ones). A higher voltage Joule Thief is better because it takes the cells down to a lower voltage, stealing more joules. For a 5-AA 7.5V Joule Thief with a single series string of 6 white LED's (~18V) will bring all cells down to about 100mV instead of the more typical 500mV. Besides, the higher voltage JT's are more efficient. And adjustably brighter with a potentiometer. Loved your Joule Thief, by the way. | |
| Aug 7, 2022 at 20:42 | comment | added | Tim Williams | I always had the understanding that you use the converter, because, well, you can't suck the last bit out of a 1.5V battery, into a white LED, without some kind of converter. And the blocking oscillator is a good candidate, being simple, yet reasonable efficiency (I measured about 60%, at 1.2V input, and instead of the LED, using a schottky and cap to rectify DC output to measure). So I don't get the motivation here; 4xAA will run a single LED just fine with a CC driver (linear or buck as one might prefer!). | |
| Aug 7, 2022 at 20:09 | comment | added | Tim Williams | @MicroservicesOnDDD Beats me. I did a 1W "Joule thief" back in the day, using a PBSS303NX, powdered iron inductor, and single AA cell, which runs up to 350kHz or so: seventransistorlabs.com/Images/JouleThief3.jpg (That's my website.) A few MHz should be reasonable with these or better transistors. I don't know what your goal is; this seems more of a discussion thread than a question and answer. [Edited by a moderator.] | |
| Aug 7, 2022 at 17:05 | vote | accept | MicroservicesOnDDD | ||
| Aug 7, 2022 at 14:17 | history | answered | Tim Williams | CC BY-SA 4.0 |
