New research shows you can extract a tiny voltage and current from a stationary tube in the earth’s magnetic field. Is this real? It is scaleable to be useful?

Paper: https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.7.013285
IEEE article: https://spectrum.ieee.org/decarbonized-future

Forum: https://www.eevblog.com/forum/blog/eevblog-1680-free-energy-from-the-earths-magnetic-field/

Reverse Engineering the Brymen BM2257 Multimeter front end to understand what changes have been made from the BM235 in the Low Z mode. DaveCAD time. Also some testing of the LowZ mode and how it works.

Forum: https://www.eevblog.com/forum/blog/eevblog-1667-reverse-engineering-the-brymen-bm2257-multimeter/
MOV datasheet: https://www.cnr.com.tw/cloudSpace/CNR_D.pdf
How to reverse engineer: https://www.youtube.com/watch?v=lJVrTV_BeGg
Multimeter Input Protection: https://www.youtube.com/watch?v=zUhnGp5vh60

The difference between Time Domain and Frequency Domain in AC circuit analysis.

AC Theory Playlist: https://www.youtube.com/playlist?list=PLvOlSehNtuHvD6M_7WeN071OVsZFE0_q-

Forum: https://www.eevblog.com/forum/blog/eevblog-1661-ac-basics-tutorial-part-5-time-domain-vs-frequency-domain/

Part 4 in the AC basics tutorial series. AC applied to resistors, capacitors and inductors, along with Capacitive Reactance and Inductive reactance.

AC Theory Playlist

It’s important to understand the difference between Mean and Median, not just for engineering, but for everyday life, so you don’t get manipulated by people with bad intentions.

UBS Global Wealth Report:
https://www.ubs.com/content/dam/assets/wm/global/insights/doc/global-wealth-report.pdf

Forum: https://www.eevblog.com/forum/blog/eevblog-1658-tutorial-mean-vs-median/

You can use almost any decent modern multimeter to safely discharge high voltage capacitor banks WITHOUT a LowZ function.
Forum: https://www.eevblog.com/forum/blog/eevblog-1655-multimeter-tip-discharge-capacitors-using-any-meter/

Transistor Zener Clamp video: https://www.youtube.com/watch?v=BGcKjy_UNQ4

Why is my lab power switchboard wired like this?

Forum: https://www.eevblog.com/forum/blog/eevblog-1652-why-is-my-lab-switchboard-wired-like-this/

FixHub portable soldering station REVIEW

https://www.ifixit.com/products/fixhub-power-series-portable-soldering-station
Just the iron:
https://www.ifixit.com/products/fixhub-power-series-smart-soldering-iron
Schematic:
https://www.ifixit.com/Document/MeQmLlLKT2LSSKFY/Portable-Power-Station-Electrical-Schematics.pdf
Repair Guide:
https://www.ifixit.com/Device/FixHub_Portable_Power_Station
3D Model:
https://www.printables.com/model/1018125-fixhub-power-series-portable-power-station/
How intercreate designed the FixHub:
https://www.intercreate.io/case-stories/ifixit-soldering-iron-and-smart-hub

00:00 – iFixIt FixHub Portable Soldering Station
01:26 – iFixit Screwdriver set + unboxing
02:41 – The smart iron
03:41 – The Portable Power hub
05:04 – The smart iron in detail
06:51 – Auto setup & motion detection
08:43 – Just the Tip
11:18 – You can buy the smart iron on it’s own
11:49 – The hate screens and buttons on iron handles
12:49 – Designed for repairability – Teardown Time
14:51 – Schematics!
15:16 – Concern about the battery terminal spacing
16:01 – Designed by Intercreate
16:47 – Complete bare PCB
18:01 – Dum Arse Dave got the battery to go sparky-spark
18:59 – It was DEAD out of the box!, repair time!
20:47 – Testing the iron from an external USB-C battery bank
22:06 – Testing the TS-80 tips
22:23 – Power meter water test
23:46 – Same power meter test with the JBC iron
24:53 – Same power meter test with the TS80P iron
25:13 – The temperature display is suspiciously consistant
25:52 – Power up timer and temperature comparison test
27:17 – Power up timer test on solder
28:06 – Basic copper clad ground plane soldering test
29:06 – Large package soldering test
29:40 – Small package soldering test
29:57 – Repetative ground plane solder test
30:28 – JBC reference test on large package
31:06 – Temperature accuracy test
31:46 – External USB device powering featurign the µSupply
32:02 – The magnetic stand
34:04 – Trying the computer connection and command line serial port
35:39 – Back to the water test with external power meter
36:54 – Conclusion

Forum: https://www.eevblog.com/forum/blog/eevblog-1646-ifixit-fixhub-portable-usb-soldering-station-review/

Follow-up video: https://www.youtube.com/watch?v=5vbg8QEZXfY

Is the US$80 Quick TS11 80W Soldering station any good?
SPOILER: Nope, it’s pretty terrible.

Forum: https://www.eevblog.com/forum/blog/eevblog-1645-$80-quick-ts11-soldering-station-review/

How DC Solar Isolators Work (TEARDOWN)

00:00 – Teardown of Benedict LS25 Solar True DC Isolator Switch
04:29 – How the contacts work
06:02 – How arc chutes and arc barriers work
12:11 – 5000V arc testing

Datasheet: https://www.benedict.at/files/documents/6617533-DC-Switch-Disconnector-D946E.pdf

Forum: https://www.eevblog.com/forum/blog/eevblog-1641-how-dc-solar-isolators-work-(teardown)/