Dave is chasing fart noises in this JBL Charge 3 waterproof speaker.
A teardown, and powerup on the bench to find the mysterious fart noises.
Will it get repaired, or will the fault do a Harold Holt?

Part 2: https://www.youtube.com/watch?v=u7sVGnrf0P0

Forum: https://www.eevblog.com/forum/blog/eevblog-1605-chasing-fart-noises-jbl-charge-3-repair/

00:00 – JBL Charge 3 Waterproof Speaker Fault
02:17 – Teardown
07:13 – Drivers
08:16 – Passive Radiators
09:58 – The Case Moulding
10:46 – Main PCB
11:36 – Under the microscope
15:30 – What’s this Power Rail doing?
18:07 – Power Rail Capture
20:16 – Are we chasing a red herring down a rabbit hole?
20:56 – Trying to capture the fault: Oscilloscope vs Microphone
22:22 – The Fault has done a Harold Holt

Burden Voltage is a BIG trap with Multimeters, don’t get caught out!
A short video demonstrating the impact of Burden Voltage / Shunt Resistance on current measurement.

Mutlimeter Shunt Tutorial Part1: https://www.youtube.com/watch?v=jx0dryLmUEQ
Part 2: https://www.youtube.com/watch?v=xSEYPP5Xsi0

Forum: https://www.eevblog.com/forum/blog/eevblog-1604-beware-multimeter-burden-voltage/

The 1km Colas Wattway Solar Roadway in Normandy in France is finally being scrapped.
Press F in the chat.
€5M of taxpayer money down the drain. That money could have bought a 5MW commercial solar farm that produced 15 times the output power, and lasted decades longer.

Forum: https://www.eevblog.com/forum/blog/eevblog-1603-colas-wattway-solar-roadways-is-dead/

Reference links:
https://www.auto-moto.com/en-bref/cette-route-solaire-qui-a-coute-5-millions-d-euros-va-etre-demantelee-30624
https://actu.fr/normandie/tourouvre-au-perche_61491/on-s-attendait-a-rencontrer-des-problemes-la-route-solaire-de-tourouvre-au-perche-une-idee-pas-si-lumineuse_53438905.html
https://time.com/4616912/solar-panel-france/
https://www.theguardian.com/environment/2016/dec/22/solar-panel-road-tourouvre-au-perche-normandy
https://www.forbes.com/sites/johnparnell/2019/08/21/frances-solar-highway-was-always-a-road-to-nowhere/?sh=783cb5c971b6
https://www.wired.co.uk/article/france-solar-panel-roads
https://www.businessinsider.com/first-solar-road-france-failure-photos-2019-8
https://www.colas.com/en/innovation/greater-mobility-lower-impact/
https://mymodernmet.com/france-wattway-solar-road/
https://www.marketwatch.com/guides/solar/solar-farm-cost/#:~:text=Solar%20Project%20Size&text=At%20an%20average%20price%20of,the%20intention%20of%20selling%20electricity.
https://www.popularmechanics.com/technology/infrastructure/a28720252/french-solar-road-failure/
https://www.digitaltrends.com/cars/frances-first-ever-solar-panel-road-appears-to-have-some-serious-issues/
https://www.wattwaybycolas.com/en/references/photos.html

Technical specs: https://www.wattwaybycolas.com/media/documents/documents-en-anglais/dp-wattway-pack-gb.pdf

Map: https://www.google.com.au/maps/@48.5872378,0.647139,3a,75y,189.86h,63.17t/data=!3m6!1e1!3m4!1sRGiblnJFqgFm2wye5_F_1Q!2e0!7i16384!8i8192?entry=ttu

My previous videos on Colas Wattway:
https://www.youtube.com/watch?v=RjbKYNcmFUw
https://www.youtube.com/watch?v=rpwx-8s1M38

The near 18 year grift of Solar Freak’n Roadways:
https://www.startengine.com/offering/solar-roadways

00:00 – Colas Wattway Solar Roadways is DEAD
07:47 – Not even the biggest road construction company can make Solar Roadways work
08:32 – Even Colas admit it’s a failed concept
10:13 – How may homes can it power?
11:29 – How big a solar farm can you buy for €5M ?
13:16 – One final walk down the biggest solar roadway in the world
16:37 – What ever happened to Solar Freak’n Roadways?

Repair of a Sony HCD-SBT20B Bluetooth Stereo. What it’s like to nail the repair and then, well come-a-gutsa and have to go down the rabbit hole to fix the fix all whilst battling bad design info.

How VFD displays work: https://www.youtube.com/watch?v=gZIRPJt69sM
Mud run video: https://www.youtube.com/watch?v=yAahT8_P-_E
Tektronix autopsy: https://www.youtube.com/watch?v=VZCokbsTwmQ
Forum: https://www.eevblog.com/forum/blog/eevblog-1603-sony-amplifier-repair/

00:00 – Sony HCD-SBT20B Bluetooth Stereo with a water ingress problem
01:17 – Water isn’t that bad actually, even mud.
02:49 – Comically long screwdriver time
04:09 – Vacuum Fluorescent display for all you VFD fanboys
05:10 – Annoying construction
06:14 – Logic level problem? Doesn’t seem to be the PSU.
07:57 – Yuck!
09:58 – PCB Cleaning time
12:11 – Did the cleaning work?
13:28 – Hang on, I think I see something…
14:36 – More corrosion
15:21 – Back to measuring voltages on the VFD
17:15 – Handy use of Auto Hold
18:00 – VFD dispaly under the microscope
19:33 – Cathode measurement
20:13 – Anode connection tracing
22:10 – I wouldn’t have designed it like this
23:08 – Sanity check
24:32 – What’s in the can?
28:16 – Schematic time. Sony service manuals are something else
33:22 – Don’t come-a-gutsa on dual diode pinouts
35:16 – Let’s power it up on the bench
37:19 – There’s something very strange about this…
40:04 – Oh FFS!
42:03 – Now it’ll work…

How VFD (Vacuum Fluorescent) Displays Work.

Extracted from a hacking video #717: https://www.youtube.com/watch?v=clUVEyi_YNM

Forum: https://www.eevblog.com/forum/blog/eevblog-1601-how-vfd-(vacuum-fluorescent)-displays-work/

ouute: Road Based Energy! Harvest kinestic energy from cars using speed bumps. Will this decarbonise and save the planet? Do the numbers add up?

https://www.rouute.com/road-based-energy
Discount Morgan Freeman promo video: https://www.youtube.com/watch?v=uGw2lcTS1gs
Introducing Rouute test video: https://www.youtube.com/watch?v=BxnksdL5nx8
https://www.electricaltimes.co.uk/worlds-first-road-based-energy-recovery-system-set-to-launch-to-market-to-help-drive-net-zero-agenda/
https://www.business-live.co.uk/manufacturing/grimsby-start-up-could-generate-26824298
https://www.facebook.com/rouutetechnologies/
Kinetic Energy Calculator: https://www.calculatorsoup.com/calculators/physics/kinetic.php

Forum: https://www.eevblog.com/forum/blog/eevblog-1600-rouute-road-based-energy-busted/

00:00 – Rouute Road Based Energy
01:58 – Discount Morgan Freeman narrates the video
03:21 – UN Goal 7 compliant
04:40 – The founder explains and shows a testing video
06:37 – Let’s look at their info pack
09:03 – Can we get serious now?
11:19 – Reminds of PaveGen that is still gaining millions in funding for energy harvesting pavements
12:41 – You canna’ change the laws of physics Captain!
13:30 – Let’s calculate the Kinetic Energy viability using their numbers
14:34 – They seem to be out by an order of magnitude at least…
16:15 – Converting kinetic energy into electrical energy is just energy THEFT on flat roads
19:57 – It works, but is all but impractical in most circumstances.

The TOP 5 Jellybean Bipolar Junction Transistors (BJT)

00:00 – What is a Jellybean Component?
01:30 – Low Power BJT: 2N3904 / 3906, SMD Marking 1A
06:49 – 2N2222
08:52 – BC547 fanboys
09:28 – Medium Power BJT: FMMT617-619 / 717-719
12:27 – SS8050 / 8550
15:08 – High Power BJT: 2N3055 / 2955
17:09 – Sneaky MOSFET, and the differences from BJT’s
19:30 – High Voltage BJT: FZT458 / 558, FMMT458/558

Jellybean Series Playlist: https://www.youtube.com/playlist?list=PLvOlSehNtuHv268f0mW5m1t_hq_RVGRSA

Forum: https://www.eevblog.com/forum/blog/eevblog-1599-top-5-jellybean-bipolar-transistors/

Teardown and reverse engineering of the ANENG AC11 Smart Mains Socket Tester + DaveCAD schematic.

Forum: https://www.eevblog.com/forum/blog/eevblog-1598-aneng-ac11-socket-tester-teardown-schematic-reverse-eng/

00:00 – ANENG AC11 Mains socket wiring tester
00:59 – Simple mains passive socket tester with neon bulbs
03:33 – Fluke ST240+ RCD Socket Tester
06:06 – Testing
07:14 – Teardown
10:54 – The multi colour segmented LCD
12:15 – Reverse Engineering Schematic
14:54 – Chipset Datasheet

Looking at the new $80 Zoyi/Zotech ZT703S Dual channel 50MHz 25,000 count 0.05% handheld oscilloscope/multimeter compared to the single channel 10MHz 10,000 count ZT702S

ZT-702S review: https://www.youtube.com/watch?v=aUU-PGUnd0E

Forum: https://www.eevblog.com/forum/blog/eevblog-1597-zoyi-zt-703s-$80-2ch-50mhz-oscilloscopemultimeter-review/

Hi-Res photos:

00:00 – The new $80 ZT-703S vs the $60 ZT-702S
03:40 – Power on and screen differences
06:25 – Multimeter
07:49 – The Bargraph is still a complete JOKE
08:50 – Power-off memory test
09:41 – Dumb Arse Dave BRICKS the ZT-702S !
10:23 – The SAME current measurement FAIL
12:19 – 0.05% ?
13:17 – Same BNC connector issue
13:44 – The signal generator is still a joke
15:53 – Trigger level issue FIXED
16:39 – Range overload bug FIXED
19:10 – Teardown
25:07 – Oops…
25:21 – Battery life and current consumption test
26:54 – Conclusion

Teardown of the UNRELEASED Digilent Analog Discovery Pro ADP2230
It will be released on the 29th Feb 2024 for US$695
Featuring the AvE Widlarizer!

Hi-Res photos:

Analog Discovery 3 Review: https://www.youtube.com/watch?v=5SbNnaMM1tQ

00:00 – Mystery Mailbag – The Analog Discovery Pro ADP2230
02:24 – Turns out this won’t be released for 2 months!
02:58 – Product comparison with Analog Discovery 3
03:59 – Not even the Beta software has support yet
04:33 – Lower cost Pro model
06:01 – First impression
08:31 – Teardown
10:09 – This calls for the AvE Widlarizer!
11:19 – PCB
14:08 – PCB comparison with AD3
15:57 – Oscilloscope Front End
18:18 – Conclusion

Forum: https://www.eevblog.com/forum/blog/eevblog-1596-new-digilent-analog-discovery-pro-adp2230-teardown/

A Chinese startup has developed a tiny 50 year life diamond nuclear battery that’s going to change the world! Yeah, nah. Same old betavoltaic, same old limitations, and same old startup marketing hype.

Beijing Betavolt New Energy Technology Co., Ltd.
https://www.betavolt.tech
https://www.betavolt.tech/359485-359485_645066.html
https://www.betavolt.tech/cp_531390.html

https://newatlas.com/energy/betavolt-diamond-nuclear-battery/
https://www.neimagazine.com/news/newschinas-betavolt-develops-50-year-nuclear-battery-11439320
https://world-nuclear-news.org/Articles/Nuclear-battery-Chinese-firm-aiming-for-mass-mark
https://www.chinadaily.com.cn/a/202401/16/WS65a68ff7a3105f21a507c9b7.html
https://www.greencarcongress.com/2024/01/20240114-betavolt.html
https://www.batterypowertips.com/betavolt-achieves-miniaturization-of-atomic-batteries-with-50-year-autonomy/
https://www.eurasiantimes.com/chinas-nuclear-battery-can-power-mobile-phones/
https://www.thediplomaticaffairs.com/2024/01/13/the-dawn-of-nuclear-batteries-and-the-potential-reshaping-of-the-global-economy/

https://www.bristol.ac.uk/media-library/sites/cabot-institute-2018/documents/Diamond_battery_FAQs_Nov_2016.pdf
https://www.bristol.ac.uk/media-library/sites/cabot-institute-2018/documents/Diamond_battery_FAQs_Nov_2016.pdf
https://en.wikipedia.org/wiki/Diamond_battery

Nuclear Diamond Battery Debunked: https://www.youtube.com/watch?v=uzV_uzSTCTM
Nuclear Diamond Battery FRAUD!: https://www.youtube.com/watch?v=5M5MF6KE-jY
Mailbag with Nuclear Tritium battery: https://www.youtube.com/watch?v=yNQCaSNIrEM
Casio calculator test: https://www.youtube.com/watch?v=qo0mizb3CE8

Forum: https://www.eevblog.com/forum/blog/eevblog-1595-50-year-chinese-nuclear-diamond-battery!/