EEVblog

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 – …

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 …

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 …

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 …

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 …

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 …

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 …

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 …

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 …

An in-depth look at the engineering inside a quantum computer, and also demonstrating the operational results live and how they are measured. With Professor Andrea Morello who is the Scientia Professor of quantum engineering in the School of Electrical Engineering and Telecommunications at the University of New South Wales, and a Program Manager at the …

Repairing the Haefely Trench PESD-1600 ESD Tester, plus some testing and discussion of the IEC 61000-4-2 standard. Part 1 teardown: https://www.youtube.com/watch?v=-xtZvSG4N9I Rotary encoder teardown: https://www.youtube.com/watch?v=UgpHZisG1PQ Forum: https://www.eevblog.com/forum/blog/eevblog-1593-16kv-esd-tester-repair-part-2/ 00:00 – Repair of the Haefely Trench PESD-1600 tester 01:40 – Special snowflake rotary encoder test 03:15 – Laugh at Dave as he solders before looking 05:06 – …

Fluke 287 Multmeter Teardown. HiRes teardown photos: Testing video: https://www.youtube.com/watch?v=FgkD8K0Ssdc Forum: https://www.eevblog.com/forum/blog/eevblog-1592-fluke-287-multimeter-teardown/

Colas Wattway is back with the two 1000sqm solar cycleway installations in the Netherlands! The Dutch are riding their bikes on two new solar cycle paths Just 4 months ago! https://www.youtube.com/watch?v=305EVbcCub4 Forum: https://www.eevblog.com/forum/blog/eevblog-1591-more-colas-wattway-solar-cycleways-in-the-netherlands!/ Some FAIL articles: https://nos.nl/artikel/2484255-innovatief-zonnefietspad-bij-maartensdijk-levert-bijna-niets-op https://www.dutchnews.nl/2023/07/solar-bike-path-fails-to-meet-electricity-targets-again/ https://www.wattisduurzaam.nl/37168/energie-beleid/utrechts-zonnefietspad-op-koers-voor-40-van-beoogde-opbrengst/ https://www.wattwaybycolas.com/en/references/photos.html https://www.colas.com/en/media/press-releases/commissioning-two-wattway-photovoltaic-cycle-paths-netherlands/ https://s.www.colas.com/cdn/ff/t-EqIdIPRtCiY46vASJDMezejJHibBO8DoRPk9njM5Y/1702047018/public/2023-12/20231211_pr-colas_wattway-in-the-netherlands.pdf

Is a modern $33 boombox from Kmart any good? Forum: https://www.eevblog.com/forum/blog/eevblog-1590-cheap-$33-boombox-teardown/

A closer look at the scanner array head from the dumpster FAX machine teardown. 00:00 – Linear Scanner Array 04:40 – CCD sensor grouping 08:24 – The optical zebra strip 11:30 – Under the x400 Olympus microscope Forum: https://www.eevblog.com/forum/blog/eevblog-1589-ccd-scanner-array/

The Elon Musk vision of Hyperloop has come-a-gutsa. Vigin Hyperloop One has gone out of business. Who could have predicted it? And who’s left standing in the Hyperloop world? Forum: https://www.eevblog.com/forum/blog/eevblog-1588-virgin-hyperloop-one-goes-bust/ 00:00 – Virgin Hyperloop has gone BUST! 02:54 – Well, it did actually carry humans. 04:33 – The Hyperloop isn’t actually an Elon Musk …

Teardown of a Brother FAX machine found in the dumpster, just because. Forum: https://www.eevblog.com/forum/blog/eevblog-1587-dumpster-fax-teardown/

A $12 6 decade resistor box, is it any good? And it’s not every day you have to repair a brand new product. https://s.click.aliexpress.com/e/_Ddfe4PL https://s.click.aliexpress.com/e/_DnK2irb DIY Decade box: https://www.youtube.com/watch?v=G-QfDkgE2qA IET Decade Box: https://www.youtube.com/watch?v=37gYHdY0DAM Genrad Decade Box: https://www.youtube.com/watch?v=fKrvtYS_6fI Forum: https://www.eevblog.com/forum/blog/eevblog-1586-stranger-things-decade-resistor-box/ 00:00 – A $12 Decade Resistor Box? 01:37 – Binding Posts: You get what you get, …