EEVblog No Script, No Fear, All Opinion

From the EEVblog forum, an infuriating electronics exam question! Plus a bonus job interview tip. 00:00 – The Forum question 02:12 – Is this a good job interview question? 03:36 – Dave’s working… 07:04 – The Solution 08:08 – Other forum responses 11:40 – Kirchoff’s Current Law MUST Hold! 12:51 …

Dave tracks down why his old 3kW system that was moved was now showing a 20% drop in output power at the same time every day. Is it inverter temperature, inverter mains voltage, solar panel cracking, dodgy connection resistance, or shading? Forum: https://www.eevblog.com/forum/blog/eevblog-1426-this-problem-can-drop-solar-output-by-20/ Podcast: Download

Part 2 of the Fluke 23 multimeter repair by digging into the bunker meter archives from episode #84 Experimenting with alfoil Forum: https://www.eevblog.com/forum/blog/eevblog-1425-fluke-repair-2-electric-boogaloo/ Podcast: Download

Repair of an original Fluke 23 Multimeter. Forum: https://www.eevblog.com/forum/blog/eevblog-1424-fluke-23-multimeter-repair/ Podcast: Download

Dave released the magic smoke during a repair! Brain was not engaged… 00:00 – Alien LED driver 01:34 – New microscope measurment setup! 02:46 – Teardown 07:45 – Brown Black Burnt 09:31 – This sucks! 16:08 – BANG! 18:49 – It seemed reasonable at the time… 19:41 – Reverse Engineering …

The report has been released on the Tesla Moorabool Victoria Big battery fire by Energy Safe Victoria, let’s go through it and discuss the cause. https://esv.vic.gov.au/news/cooling-system-leak-led-to-victorian-big-battery-fire/ Report: https://esv.vic.gov.au/wp-content/uploads/2021/09/VBB_StatementOfFindings_FINAL_28Sep2021.pdf Forum: https://www.eevblog.com/forum/renewable-energy/australias-biggest-tesla-battery-storage-system-at-moorabool-is-on-fire/msg3715759/#msg3715759 00:00 – Overview Tesla Moorabool Fire 02:44 – Finding on the cause of the fire 07:14 – Corrections and improvements …

Dave hacks a dumpster find to power it up because of a PITA power connector. Then does some bonus PCB imaging. Forum: https://www.eevblog.com/forum/blog/eevblog-1421-dumpster-hack/ Podcast: Download

1 hour Mailbag! Forum: https://www.eevblog.com/forum/blog/eevblog-1420-mailbag/ SPOILERS: 00:00 – Pleo the Dinosaur! The designer talking about Pleo: https://www.youtube.com/watch?v=BOba_zGoZq8 The Commodore Collector: https://www.thecommodorecollector.com/ 06:23 – Amazing workbench of the week from voltnut Xdevs! https://xdevs.com/ 14:25 – DEC VAX 370/11 135A 5V PSU teardown 22:22 – Emizon MCM Electronics alarm panel + AdPlayer …

RIP Sir Clive Sinclair. Dave finally gets around to starting to take apart and restore the classic Sinclair C5 electric vehicle. Forum: https://www.eevblog.com/forum/blog/eevblog-1420-sinclair-c5-restoration-part-2/ Podcast: Download

This “Repair” of a Keysight DSOX1102G oscilloscope was a tad embarrassing… Forum: https://www.eevblog.com/forum/blog/eevblog-1418-the-most-embarrassing-repair/ Podcast: Download

Following in from the DC circuit fundamanetals series starts the AC circuti fundamentals series. This part 1 looks at: – What is Alternating Current – How AC is created using a generator – Angular Frequency – The sinusoidal waveform, benefits and downsides – Average, peak, peak to peak, and RMS …

Random teardown from the lab, a Sennheiser EW100 true diversity wireless microphone receiver. Plus an explanation of how antenna diversity works. Transmitter and camera receiver teardown: https://www.youtube.com/watch?v=dFvN04Woihk Gary: https://twitter.com/Gary43696951 Forum: https://www.eevblog.com/forum/blog/eevblog-1416-random-teardown-sennheiser-ew100-true-diversity-receiver/ Podcast: Download

Reverse engineering the Micsig DP10007 high voltage differential probe. Turning the PCB into a schematic. Forum: https://www.eevblog.com/forum/blog/eevblog-1415-reverse-engineering-the-dp10007-differential-probe/ Reverse enginering how-to for the Rigol oscilloscope: https://www.youtube.com/watch?v=lJVrTV_BeGg DIY light box for PCB photography: https://www.youtube.com/watch?v=6ZH2KeplSrs Podcast: Download

Can Dave destroy the Micsig DP10007 high voltage differential probe by turning the voltage up to 1100V RMS? Plus a teardown of course. https://www.eevblog.com/product/hvp70/ Forum: https://www.eevblog.com/forum/testgear/new-eevblog-hv-probe/ Podcast: Download

NOTE: This video was a response to various questions about Right to Repair I hastily did for a legacy media current affairs program who are doing a segment on right to repair. But I now won’t be on it, so here is the footage if it’s of use to anyone …