EEVblog No Script, No Fear, All Opinion

Dave debunks the Xiaomi Mi Air wireless charging system that claims to be able to charge at 5W up to several meters using mm wave RF beam steering technology. Where have we heard this before? The Amp Hour 5G episode: https://theamphour.com/430-shahriar-discusses-5g/ https://blog.mi.com/en/2021/01/29/forget-about-cables-and-charging-stands-with-revolutionary-mi-air-charge-technology/ Forum: https://www.eevblog.com/forum/blog/eevblog-1369-xiaomi-mi-air-wireless-charging-busted!/ Podcast: Download

Part 2, this time looking at different types of active oscillocope probes. Single ended active FET probes, differential active FET probes, current clamp probes, high voltage differential probes, positional current probes, and EMC magnetic and electric field probes. 2MHz Current clamp probe: https://www.eevblog.com/product/cp2100b/ Active FET probe: https://amzn.to/3oq0Q8g EMC probe set: …

Dave looks at the pros and cons of 5 different types of oscilloscope passive probes. Switchable x1/x10, Fixed x10, High voltage single ended, DIY Transmission line Z0 probe, and BNC to banana/croc leads. PART 1 of 2 200MHz 100M 100:1 HV probe: https://amzn.to/3onPj9w Cheap 100:1 HV probe: https://amzn.to/36fN0iM 8kV HV …

Another mystery item from the storage bunker. Forum: https://www.eevblog.com/forum/blog/eevblog-1366-mystery-bunker-item-teardown/

Dave answers a viewer technical question about why his circuit is acting up, and goes through a design review outlining the possible problems. Level translation, clocking, schmitt triggers, line driving, loading, buffering, bypassing, and other aspects are discussed. If you want to see more design reviews like this please drop …

Dave repairs the Compaq Portable Plus power supply. And takes a look at the schematic and an unusual old documentation system. Forum: https://www.eevblog.com/forum/blog/eevblog-1364-compaq-portable-psu-repair/ Podcast: Download

Solar FREAKIN’ Roadways has just raised over $1M by selling common stock in the company! AND has scored ANOTHER government contract!, this time from the Department of Defence! Solar FREAKIN’ Aircraft Carriers! https://www.startengine.com/solar-roadways Energy Output: https://monitoringpublic.solaredge.com/solaredge-web/p/kiosk?guid=1e085701-ccb3-4ce5-b107-86e3b5e831dd&locale=en_US Forum: https://www.eevblog.com/forum/blog/eevblog-1363-solar-freakin-roadways-gets-new-funding!/ Podcast: Download

First Mailbag of 2021 is a skookum bumper! Forum: https://www.eevblog.com/forum/blog/eevblog-1362-a-very-skookum-mailbag/ Spoilers: 00:00 – AvE’s 5lb Copper Widlarizer! https://www.youtube.com/user/arduinoversusevil Making of the hammer: https://www.youtube.com/watch?v=lutiVGV5Omg Final packing of hammer: https://www.youtube.com/watch?v=Exs4kQre62I 05:05 – Avionics Guest Lab from Gary Bertram 10:01 – Koki’o Project Cases: https://www.crowdsupply.com/cowfish-studios/kokio-project-case 12:50 – 1960’s Chinese Analog VOM! + modern …

By popular demand, Dave tears down the dodgy tactile switch from his aircon, and compared with a couple of others. Forum: https://www.eevblog.com/forum/blog/eevblog-1361-dodgy-tactile-switch-teardown/ Podcast: Download

Dave’s lab aircon control panel has been dodgy for years, time to finally fix it! A simple fault with rather interesting and complicated set of a symptoms based on a (poor?) design decision. Forum: https://www.eevblog.com/forum/blog/eevblog-1360-repair-aircon-control-panel/ Podcast: Download

Dave shows you his new compact portable video blogging kit that provides a complete vlogging solution in a tiny grab’n’go case! With 4 different audio solutions, lighting, power & charging solution, and a versatile handle and frame system, along with a tripod in an incredibly compact case. Bill of Materials: …

Collaboration with CPU Galaxy! The $250,000 IBM ceramic hybrid TCM processor module is X-RAYED! BONUS x-ray of a classic DIP chip! Technical PDF: https://eevblog.com/files/ibm-system390-air-cooled-alumina-thermal-conduction-module.pdf Forum: https://www.eevblog.com/forum/blog/eevblog-1358-$250-000-ibm-processor-x-rayed/ Podcast: Download

Dumpster Santa delivered a nice Coolermaster Mini-ITX with Gigabyte GS-H97N motherboard and an Intel Core i5 inside. Forum: https://www.eevblog.com/forum/blog/eevblog-1357-dumpster-diving-santa-pc/ Podcast: Download

If you thought Solar Rowadways was done and dusted in 2020, you were WRONG! French road company Colas Wattway have found a new sucker to try their already epically failed Wattway solar panels, this time in Georgia in the United States as part of a government funded initiative through Curiosity …

Teradown of the new $399 Siglent SDS_1104X-U Four Channel oscilloscope. A cheaper alternative to the SDS1104X-E And what’s all this magnetic shielding stuff anyhow? Forum: https://www.eevblog.com/forum/blog/eevblog-1355-new-siglent-sds1104x-u-$399-4ch-oscilloscope-teardown/ Podcast: Download