Dave goes through the real calculations of what it ultimately cost him to rent an office vs buying an office back on 2015.
And on the importance of being your own bank, compounding interest reduction, paying off your loan early, and offset accounts for cash flow benefits.

Louis Rossmann: https://www.youtube.com/watch?v=K5MEx4xhPJc

Forum:

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PART 2 Troubleshooting the Sony RX100 Mk4 camera.

Service manual: https://www.eevblog.org/files/dsc-rx100m4-sm2.pdf
Schematics: https://www.eevblog.org/files/dsc-rx100m4.pdf

PART1: https://www.youtube.com/watch?v=x0_9GV0QU3A

Forum: https://www.eevblog.com/forum/blog/eevblog-1428-sony-rx100-camera-repair-and-then-wtf!/

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Dave "repairs" his Sony RX100-IV camera only to go WTF?!
A long video that is mostly disassembly and reassembly, so use the time markers if you are bored.

00:00 - Sony RX100 Mk4 Repair
04:30 - Teardown
14:44 - Dave gets ZAPPED!
23:19 - Processor Board
25:51 - Lens assembly
30:00 - Finally IN to the power button PCB!
34:49 - I was hoping...
36:24 - Reassembly
45:00 - WTF is THIS?!

Forum: https://www.eevblog.com/forum/blog/eevblog-1428-sony-rx100-camera-repair-and-then-wtf!/

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From the EEVblog forum, an infuriating electronics exam question!

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 - REBEL against The System!
15:10 - Xrunner's practical test
21:38 - Practical Test

Forum: https://www.eevblog.com/forum/beginners/calculate-current/

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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/

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Part 2 of the Fluke 23 multimeter repair by digging into the bunker meter archives from episode #84
Experimenting with alfoil

Part 1: https://www.youtube.com/watch?v=-9kNSR4ozT4
High energy Multimeter destruction: https://www.youtube.com/watch?v=M-FZP1U2dkM
LCD Technology tutorial: https://www.youtube.com/watch?v=mo4_5vG8bbU

Forum: https://www.eevblog.com/forum/blog/eevblog-1425-fluke-repair-2-electric-boogaloo/

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Repair of an original Fluke 23 Multimeter.

Forum: https://www.eevblog.com/forum/blog/eevblog-1424-fluke-23-multimeter-repair/

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Dave released the magic smoke during a repair!
Brain was not engaged...
Astable Aliens: https://www.youtube.com/watch?v=rgbg4jLFVBc

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

Forum: https://www.eevblog.com/forum/blog/eevblog-1423-magic-repair-smoke/

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Resultsw of the 2021 EEVblog survey. Thanks to everyone who contributed!
NOTE: The test equipment live prize draw will be on the EEVblog2 channel soon.

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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 required to get back online
09:26 - Physical pack spacing
11:01 - Statement of Technical Findings Report
12:30 - Root cause
13:45 - Contributory Factors
16:53 - Lessons leanred and preventing a recurrence
17:31 - Dave's hypothesis
20:49 - Fire propagation prevention
22:28 - Conclusion
24:50 - Other installations

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Dave hacks a dumpster find to power it up because of a PITA power connector.

Forum: https://www.eevblog.com/forum/blog/eevblog-1421-dumpster-hack/

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1 hour Mailbag!

Forum: https://www.eevblog.com/forum/blog/eevblog-1420-mailbag/

SPOILERS:
00:00 - Pleo the Dinosaur!
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 LCD screen
Mike's LED Shed: https://www.youtube.com/c/MikesLEDShed/
31:29 - GVDA GD128 Colour LCD Multimeter
https://s.click.aliexpress.com/e/_ATURD0
45:37 - I void Warranties T-Shirt
46:25 - Denon capacitor xmas ornament
47:41 - NetSTM32 ethernet board
https://www.tindie.com/products/netcubesystemsat/stm32-ethernet-board/
https://netcube.li/docs/stm32netboard/
51:22 - Kevin Lutzer's PCB Business Card
https://kevin.lutzer.ca/overview
54:22 - SnowPi RGB Xmas ornament
https://snowpi.xyz/
56:48 - Probe dithering average vibration attachment

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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/

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This "Repair" of a Keysight DSOX1102G oscilloscope was a tad embarrassing...

Forum: https://www.eevblog.com/forum/blog/eevblog-1418-the-most-embarrassing-repair/

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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 waveforms, calculation and conversions.
- Non-sinusoidal waveforms
- Crest factor and its impact on multimeter RMS measurement

Forum: https://www.eevblog.com/forum/blog/eevblog-1417-alternating-current-ac-basics-part-1/

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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

Forum: https://www.eevblog.com/forum/blog/eevblog-1416-random-teardown-sennheiser-ew100-true-diversity-receiver/

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It's EEVblog survey time again!
Plus a giveaway of a BM235, BM786, 121GW, HVP70, and CP2100B
Thanks in advance
Survey link: https://forms.gle/e4fwzjMvgFjUHaWN7

Previous 2017 results: https://www.youtube.com/watch?v=YTKEUN_1l74
Moon video: https://www.youtube.com/watch?v=oYPmitSg268
Forum:

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Reverse engineering the Micsig DP10007 high voltage differential probe.
Turning the PCB into a schematic.

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

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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/

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#ElectronicsCreators #HighVoltage #Teardown

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 else.

Forum: https://www.eevblog.com/forum/eevblab/eevblab-88-right-to-repair-questions-answers/

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Teardown and measurements with the Micsig CP2100B 2.5MHz oscilloscope current probe.
Also a demonstration of mains switch mode power supply current and noise measurement, and also some performance tests.

Use the coupon code FLUX for 15%
And paying with crypto gets you a further discount on top of that!
https://www.eevblog.com/product/cp2100b/
Or get the cheaper lower bandwidth 800KHz CP2100A model:
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https://s.click.aliexpress.com/e/_AKl2Y2

Oscilloscope standard deviation measurement: https://www.youtube.com/watch?v=G8Qoj3TpO9A

00:00 - Intro
05:39 - Teardown of base unit
14:25 - Clamp unit teardown
23:40 - Mains switchmode current measurement
34:00 - Measuring the Earth's magnetic field!
34:42 - Noise measurement
35:26 - Low current measurement

Forum: https://www.eevblog.com/forum/blog/eevblog-1413-micsig-cp2100b-current-probe-teardown-and-test/

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Dave tears down the 10W Coherent 300C Argon Ion laser. All 42kg, 1.2m and 24kW worth!

The App Hour podcast episode: https://theamphour.com/521-outdoor-laser-projection-object-mapping-with-daryl-tewksbury/

PSU teardown: https://www.youtube.com/watch?v=N8hz3MGS01E
Laservision Australia: https://www.youtube.com/user/LaservisionAustralia

Forum: https://www.eevblog.com/forum/blog/eevblog-1412-argon-ion-laser-teardown/

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#ElectronicsCreators #Laser #Teardown

Mailbag!

Froum: https://www.eevblog.com/forum/blog/eevblog-1410-mailbag/

SPOILERS:
00:00 - Dancom RT403B 25W VHF Marine Transceiver teardown.
09:07 - Workbench of the week, Tony Albus:
https://www.youtube.com/channel/UCwLPcv2xiA3D9lfGArF58ww
TEA: https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/
12:36 - Riedon SSA-100 100A Differential Isolated Current Sensor.
https://riedon.com/
https://www.digikey.com/en/products/detail/riedon/SSA-100/12149327
22:19 - DODGY! Soviet era mains rechargable torch
27:36 - Jon Newcomb's Microcontroller Proto Boards
https://www.ebay.com/usr/jon_newcomb
33:57 - Affable Snake Breadboard LED bargraph
https://www.tindie.com/products/affablesnake/slim-breadboard-indicator-green-8-position/
35:34 - Mystery $2 ebay item DESTROYED by Widlarizer!
37:47 - Present from a 13yo viewer
39:40 - Multimeter PicoProbes:
https://www.tindie.com/products/twires/picoprobes/

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A practical demonstration of Lenz's law and back EMF in an inductive relay coil and how to solve it using a Freewheeling/Flywheel/Flyback/Snubber/Clamp diode. Also the downsides of clamping diodes, and switch arcing supression.
Also a look at an AMAZING potential phenomenon you probably haven't seen before!
Actually, two rather cool things you probably haven't seen before.
Along with transistor ratings, transistor storage current, and Collector-Emitter breakdown voltage, there is a lot to unpack in this video.

This is a follow-on from the DC Transients Fundamentals video:
https://www.youtube.com/watch?v=8nyNamrWcyE

00:00 - Recap of Relays, Inductors, Faraday & Lenz's Laws
02:30 - Relay Back EMF Explained
07:09 - The Flywheel analogy of Inductors
08:30 - Relay circuit demonstration
12:35 - 700V Back EMF!
14:43 - BJT Transistor Storage Time
17:03 - Back EMF Diode clamp demonstrated
19:06 - An AMAZING demonstration!
24:43 - Trap for young players
25:23 - DOWNSIDES of Back EMF Diodes
28:38 - BONUS cool effect of Back EMF diode DEMONSTRATED

Forum: https://www.eevblog.com/forum/blog/eevblog-1409-the-huge-trap-of-inductor-back-emf/

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WiGL have raised almost 5 MILLION dollars on StartEngine.
What's worse than another wireless charging technology startup? - One that doesn't really have any original technology and simply uses off the shelf RF energy harvesting chips!
This one is just embarrassing.
And they want to comepete with Energous, WiTricity, Ossia and others, LOL.

Sorry for the length, here are some handy time markers:
00:00 - WiGL Raised $5M on StartEngine
02:50 - A look at the StartEngine campaign
07:15 - It's like WiFi for Power! Where have we heard this before?
12:02 - Let's comete with Enerous, HUAWEI, WiTricity, and Ossia. LOL
13:52 - Brand Dominance!
16:00 - Let's watch the promo video!
17:38 - The AMAZING WiGL Energy Unit technology!
23:07 - A whopping 2.5mW!
25:56 - All hail the White Paper!
29:40 - The Patent
34:12 - Let's charge an iPhone!
36:58 - Their latest technology demonstrator!
38:15 - WiGL Tech Talk with the founder showing off their latest tech!
45:26 - INFINITE POWER!
46:23 - We've already done it! No, no you haven't.
47:49 - Uh-Oh! We have a SKEPTIC!

WiGL Video: https://www.youtube.com/channel/UCp8St2LrfCuHuPd1UoXfjng
StartEngine: https://www.startengine.com/wigl
White Paper: https://wiglpower.com/wp-content/uploads/2018/02/WigL-White-Paper-Download.pdf
Home page: https://www.wiglpower.com/
Patent: https://patents.google.com/patent/WO2018212805A1/en?oq=9985465

Forum:

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