More mailbag! Subscribe on Library: https://lbry.tv/@eevblog:7 SPOILERS: SDS2000X Plus Series Digital Phosphor Oscilloscopes https://siglentna.com/products/digital-oscilloscope/sds2000xp-series-digital-phosphor-oscilloscope/ 5:33 Otur 15W Laser Engraver: https://s.click.aliexpress.com/e/_d9lWRLx https://s.click.aliexpress.com/e/_d6cHmFB 17:59 Practical Audio Electronics Book + Sharp Calculator https://amzn.to/2YAm76g 29:07 555 Sticker Book 31:44 Quitech Otti USB power measurement and battery analyser: https://www.qoitech.com/ 1:04:00 USB cable checker: Is it me, or is it USB? ...

Dave finally found some high CRI, 5000K, low glare LED ceiling panels. Or has he? Will they measure up? https://www.vibelighting.com.au/products/interior-light-fittings/led-panel-lights/skylite-110.html Forum: https://www.eevblog.com/forum/blog/eevblog-1303-new-lab-led-panels/

What usable parts can you get from a dumped high end office Dell / Fuji Xerox laser printer? Library: https://lbry.tv/@eevblog:7 Forum: https://www.eevblog.com/forum/blog/eevblog-1302-scrapping-a-dumpster-laser-printer-for-parts/

Tragedy in the EEVblog lab as the arcade machine releases the magic smoke. Claytons repair time. Forum: https://www.eevblog.com/forum/blog/eevblog-1301-arcade-machine-repair/

“Per Mille” is a trap for young players. “Parts Per” notation explained, along with percentage and ppm. Forum: https://www.eevblog.com/forum/blog/eevblog-1300-parts-per-notation-explained/

Repairing a Toshiba Satellite S40-B Laptop found in the dumpster. Library: https://lbry.tv/@eevblog:7/ Forum: https://www.eevblog.com/forum/blog/eevblog-1299-dumpster-laptop-repair/

A look at the $70 Juntek 2000W power supply with wireless display. Also the 3000W model, but does it have a problem? https://s.click.aliexpress.com/e/_dZVpwTI Library: https://lbry.tv/@eevblog:7 Forum: https://www.eevblog.com/forum/blog/eevblog-1298-$70-2000w-power-supply/

Dave’s long term LCD DC bias experiment has turned a regular 7 segment LCD effectively into an E-Ink/E-Paper display! Microchip LCD App Note: http://ww1.microchip.com/downloads/en/AppNotes/AN658-LCD-Fundamentals-and-the-LCD-Driver-Module-of-8-Bit-PIC-MCUs-00000658C.pdf Datasheet: https://www.lumex.com/spec/LCD-S101D14TR.pdf Forum: https://www.eevblog.com/forum/blog/eevblog-1297-turn-an-lcd-into-e-paper!/

A revisit of the Alkaline battery leakage testing. Library: https://lbry.tv/$/invite/@eevblog:7 Forum: https://www.eevblog.com/forum/blog/eevblog-1296-alkaline-battery-leakage-testing-2-electric-boogaloo/

What makes a good lab HEPA air filter and purifier? Forum: https://www.eevblog.com/forum/blog/eevblog-1295-what-makes-a-good-lab-hepa-air-filter/