EEVblog

Dave shows you how to use your oscilloscope probe to detect mechanical vibrational modes on your PCB. And shows off the Crysound Acoustic Imaging Camera! https://www.kickstarter.com/projects/pocket-acoustic-cam/crysound-pocket-acoustic-imaging-camera/ Forum: https://www.eevblog.com/forum/blog/eevblog-1743-mechanical-vibration-detection-with-your-oscilloscope-probe/

More Dumpster Diving. What did we score today? Forum: https://www.eevblog.com/forum/blog/eevblog-1742-today-in-the-dumpster-room/

More amazing Mailbag! 00:00 – BOOK Professional Electronic Design Best Practices, Volume II 06:01 – A Crusty Nautalytics Simple Compass 11:46 – DPS DIN Power Supply Modules https://digitalpowersystems.eu/hdr20/ USB-AC-PD 20:22 – The Book: The Ultimate Guide to Rebuilding a Civilization Forum: https://www.eevblog.com/forum/blog/eevblog-1741-mailbag/

Looking at a dumpster diving Dell laptop HAUL! with Sagan! Forum: https://www.eevblog.com/forum/blog/eevblog-1740-dumpster-diving-dell-laptop-haul!/

The Beelink EQR6 Ryzen 9 Mini PC mysteriously failed after an upgrade, why? 00:00 – This Beelink EQR6 failed just after an upgrade, WHY? 02:28 – Is is the flat flexes? 04:45 – Woah, what’s THIS? 07:17 – Nooooooooo! It can’t be… Forum: https://www.eevblog.com/forum/blog/eevblog-1739-unusual-fault-in-a-beelink-ryzen-9-mini-pc/

Everyone’s favorite Solar Roadway, the OG Solar Freakin’ Roadways is still going strong with NEW EQUITY FUNDING! WeFunder: https://wefunder.com/solar.roadways.incorporated StartEngine: https://www.startengine.com/offering/solar-roadways US Army contract: https://www.highergov.com/contract/W5170122C0119/ Forum: https://www.eevblog.com/forum/blog/eevblog-1738-solar-freakin-roadways-new-funding!/

A chat with Alex Lidow, the inventor of the original Power MOSFET and HEXFET at International Rectifier. Former CEO of International Rectifier (founded by his father!), and now Founder & CEO of EPC (Efficient Power Conversion) that make the most efficient GaN FET’s on the market. https://epc-co.com We cover everything from inventing the power MOSFET …

What are the TOP 5 Jellybean MOSFET’s? 00:00 – MOSFET vs BJT 02:21 – What is a Jellybean? 04:14 – 2N7002 N-Channel wimpy generic 13:10 – BSS84 P-Channel wimpy generic 14:47 – AO3400 N-Channel SOT-23 21:30 – Continuous Current vs Pulse Current Rating and SOA Graph 24:15 – AO3401 P-Channel SOT-23 25:56 – AO4410 N-Channel …

Nobody truly understands the complexity of modern supply chains for the technology we take for granted. How the AI supply chain works, from ChatGPT to sugercane https://aisupplychain.vercel.app/ https://x.com/chiefofautism Forum: https://www.eevblog.com/forum/blog/eevblab-138-you-dont-understand-supply-chains!/

How to measure DC power rail high bandwidth waveforms with the offset control on your oscilloscope. Active Probes, Passive Probes, Z0 probes, and specific DC Power Rail Probes are compared. 00:00 – How to measure power rails with Active Probes and Power Rail probes 08:03 – Signal Skew 09:54 – 10:1 Passive Probe 10:18 – …

The Uni-T UT892 High Voltage Multimeter is unusually rated to 2000V! Teardown and testing time, is it any good? 00:00 – Uni-T UT892 2000V High Voltage Multimeter 02:39 – Unboxing 03:40 – FAIL right off the bat! Probes matter. 05:53 – Teardown 08:06 – Where’s the MOV’s? 09:07 – The case design leaves a lot …

More mailbag! 00:00 – Vetus Pars Retro Chip Tester https://retrotroniks.com/product/vetus-pars-retro-chip-tester/ 17:05 – PRP1 2GHz Power Rail probe https://www.eevblog.com/forum/testgear/prp1-low-cost-2ghz-power-rail-probe/ 22:07 – PRP1 Teardown 24:10 – PRP1 Circuit Explanation 27:08 – PRP1 Testing 32:09 – Comparison with Agilent 2GHz Active Probe Forum: https://www.eevblog.com/forum/blog/eevblog-1733-mailbag-2ghz-power-rail-probe-retro-chip-tester/

How much capacity has this 20+yo 1000+ cycle Panasonic 14500 lithium ion battery lost? 00:00 – Panasonic electronic shaver teardown 06:30 – Battery dimensions match the type number 08:24 – The battery capacity test setup 10:40 – 500mA Constant Current test 11:38 – How much energy is left in a “flat” battery? 13:46 – 250mA …

The $50 Ziboo 17B Pro 1500V Multimeter vs the $150 Fluke 17B MAX Is it any good? Forum: https://www.eevblog.com/forum/blog/eevblog-1731-$50-ziboo-17b-pro-multimeter-vs-$150-fluke-review/

Part 8 of the AC Basics tutorial series. Looking at the difference between Apparent, Reactive, and Real Power. Plus Power Factor 00:00 – Voltage & Current phase relationship 02:28 – Real Power 07:09 – Apparent Power 12:02 – Power transmission systems and copper losses 17:45 – Reactive Power 20:17 – It’s all a Fugazi, it …

Ohms law applied to AC. AC Tutorial Playlist: https://www.youtube.com/playlist?list=PLvOlSehNtuHvD6M_7WeN071OVsZFE0_q- Forum: https://www.eevblog.com/forum/blog/eevblog-1729-ac-basics-tutorial-part-7-ac-ohms-law/

Part 6 of the AC basics tutorial video series, covering Impedance, Conductance, Susceptance, and Admittance. 00:00 – AC Tutorial Series Part 6 00:56 – Impedance 07:32 – Reactance vs Impedance 08:17 – Conductance 11:21 – The Fluke 87V measures conductance! 12:12 – Susceptance & Admittance 13:53 – Tying it all together AC Tutorial Playlist: https://www.youtube.com/playlist?list=PLvOlSehNtuHvD6M_7WeN071OVsZFE0_q- …

Simple repair of a Casio CT-X700 keyboard, with Sagan, and some really bad music. Forum: https://www.eevblog.com/forum/blog/eevblog-1727-repair-casio-ct-x700-keyboard/

Repairing a failed EV charger DC-DC converter had an unusual twist. Forum: https://www.eevblog.com/forum/blog/eevblog-1726-repair-of-an-ev-charger/

Sagan joins Dave to open more packages, in everyone’s favorite segment Mailbag. 00:00 – The Connector Book! by Davide Andrea https://connectorbook.com/ Listen to Davide on The Amp Hour: https://theamphour.com/708-all-the-connectors-with-davide-andrea/ 11:02 – BLE CaberQu USB-C cable tester https://caberqu.com 22:02- Teardown of the CaberQu 24:22 – Snaptron FREE Sample Box https://www.snaptron.com/free-samples/sample-box/ 24:55 – Sagan’s Knife Skills! 32:10 …