EEVblog

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 a like and comment. Forum: ...

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/

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!/

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 replica still made today. 19:35 ...

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/

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/

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: Sony ZV1 camera: https://amzn.to/3ptEjbG Pelican ...

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/

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/

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 Labs and The Ray in ...

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/

Dave breaths life into the old Compaq Portable from 1984. Forum: https://www.eevblog.com/forum/blog/eevblog-1354-compaq-portable-repair-part-1/

Eagle eyed viewers spotted a short between two pins on a TQFP chip in the previous teardown video. This isn’t a dodgy assembly issue, it’s a deliberate design short, Dave explains how and why. Solder masks and snap grids. Forum: https://www.eevblog.com/forum/blog/eevblog-1353-why-are-these-pins-shorted/

Teardown of a Made in Australia MicroAir T2000 aircraft transponder. http://microair.com.au/products/26/T2000SFL-Transponder-Rev8- Forum: https://www.eevblog.com/forum/blog/eevblog-1352-aircraft-transponder-teardown!/

Mailbag time! Forum: https://www.eevblog.com/forum/blog/eevblog-1351-mailbag/ Mailbag bench images to: eevblog+mailbag@gmail.com SPOILERS: 00:00 – GPS Tracker Battery Leak 06:47 – Guest RF Lab – Chuck Kummer W7CLK 09:46 – Marklin HO scale railway turnout point 19:29 – GVDA GD118B Pocket Multimeter review https://s.click.aliexpress.com/e/_Ab3RNe 39:10 – GVDA GD116A AC Voltage Detection Stick review https://s.click.aliexpress.com/e/_AD7szi 43:41 – E-design Tweezer ...