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Complex numbers are NOT complex! How complex numbers are used in AC circuit analysis. 00:00 – Complex Numbers 00:44 – Phasor graphical addition 01:22 – Why do calculators have the R-P and P-R buttons? 02:44 – Phasor diagram 03:59 – The AC voltage equation 04:47 – The complex plane and …

Part 2 of the AC Basics tutorial series. What are phasors and doing phasor addition. In-phase, out of phase, and leading and lagging waveforms. Phi vs Theta phase angle. Leading into complex numbers in Part 3. 00:00 – AC Basics Theory 00:40 – How an AC waveform is produced 01:37 …

A walk around the 2022 Electronex show in Sydney. 00:00 – Electronex 2022 01:13 – Phoenix Contact 01:38 – Tektronix 03:14 – Siglent 04:37 – John South at Emona + New Rigol StationMax Oscilloscope 07:38 – Harbuch Electronix isolation transformers 09:38 – Mantis remote 3D viewing microscope 12:05 – SMCBA …

Stanford University researchers have made a solar panel that works at nighttime! It will reduce or eliminate the need for battery storage! TAKE THAT Big Oil! You can probably guess how it works… Let’s BUST this impractical boondoggle wide open. The research paper: https://aip.scitation.org/doi/pdf/10.1063/5.0085205 Forum: https://www.eevblog.com/forum/blog/eevblog-1466-stanford-solar-power-at-nightime-busted/ 00:00 – Pulitzer prize …

It’s been a while since the dumpster has delivered a computer. Today we get a HP Proliant ML350p Gen8 xeon server. Does it work? Forum: https://www.eevblog.com/forum/blog/eevblog-1466-dumpster-dive-xeon-server/ Youtube: Odysee: Utreon: Podcast: Download

Modifying an old Maggy/Luxo magnifying lamp to get LED lighting and work from a Sony NP-FW50 battery.Video available on Odysee and Utreon

How you can use your multimeters capacitance range to measure inductors, using the reciprocal method. Forum: https://www.eevblog.com/forum/blog/eevblog-1465-measure-inductors-using-a-multimeter/ Podcast: Download

The TOP 5 Jellybean comparators, plus a bonus and special snowflake choice. 00:00 – Jellybean Comparators 01:20 – Traps for young players using Opamps as comparators 04:43 – Is the old School LM311 still THE jellybean? https://www.ti.com/lit/ds/symlink/lm311-n.pdf 11:17 – TS391 Small single comparator https://www.mouser.com/datasheet/2/389/cd00001660-1795546.pdf 16:33 – LM393/LM2903 Dual comparator https://www.ti.com/lit/ds/symlink/lm393a.pdf …

What’s in Dave’s Mailbag? Forum: https://www.eevblog.com/forum/blog/eevblog-1463-mailbag/ SPOILERS: 00:00 – Mailbag Bonanza! 03:24 – 3M IDC Crimping tool 04:57 – Bulova Accutron Watchmaster battery tester 06:52 – The best button EVER! 07:24 – Continentak Specialties Corporation breadboard 07:53 – Moving Iron AC ammeter 09:29 – Analog Devices power brick 09:57 – …

As if Dymo adding DRM to force you to use their labels wasn’t low enough, they have been BUSTED reusing their old 450/4XL Amazon listings in order to keep all their old positive reviews to make you think people are positively reviewing their new 550/5XL DRM model! This deception should …

Don’t buy the new Dymo 550 or 5XL label printers, they now use DRM NFC/RFID technology in the paper rolls to force you into using their labels at 10 TIMES the cost! EFF: https://www.eff.org/deeplinks/2022/02/worst-timeline-printer-company-putting-drm-paper-now NXP NFC chip: https://www.nxp.com/docs/en/data-sheet/SL2S2602.pdfSLRC610 RFID/NFC frontend: https://au.mouser.com/datasheet/2/302/SLRC610-1127743.pdf Forum: https://www.eevblog.com/forum/reviews/dymo-550-thermal-printer-drm-hacking/ Photos: Podcast: Download

Join Dave in the search for an alternative replacement MOSFET. It might not be as easy as it sounds. Talk about how to identify components and circuit function, MOSFET parameters, and using google and parametric searches on supplier and manufacturer websites. Can YOU find a -30V 17A P Channel SO-8 …

Dave repairs his failed Aputure Amaran HR672C LED studio light which is mysteriously killing batteries and falsely indicates charging when no batteries are installed. And salvaging the spare part from an old dumpster laptop! Forum: https://www.eevblog.com/forum/blog/eevblog1460-interesting-repair-of-an-aputure-amaran-led-studio-light/ Podcast: Download

Is it worth salvaging parts from a consumer HP office Inkjet Printer/Scanner from the dumpster? Forum: https://www.eevblog.com/forum/blog/eevblog-1459-is-it-worth-parts-salvaging-an-inkjet-printerscanner/ Podcast: Download

Can’t see those pesky laser etched part numbers on chips? Dave demonstrates what’s happening with the microscope polarising filter lenses on Twitter that’s blowing people’s minds. Does it actually work? And other tricks of the trade. https://twitter.com/azonenberg/status/1494061604161220615 https://twitter.com/ghidraninja/status/1494343655053832203 Aputure Amaran AL-M9 LED light https://amzn.to/3H0O5KW Leica microscope brochure: https://downloads.leica-microsystems.com/Leica%20LED3000%20RL/Brochures/Leica%20LED3000-5000_Brochure_EN.pdf Forum: https://www.eevblog.com/forum/blog/eevblog-1458-microscope-polarising-magic!/ …