EEVblog

Join Dave in the search for an alternative replacement MOSFET. It might not be as easy as it sounds. Talk about how to identify components and circuit function, MOSFET parameters, and using google and parametric searches on supplier and manufacturer websites. Can YOU find a -30V 17A P Channel SO-8 MOSFET *WITH* ESD protection? Forum: ...

Dave repairs his failed Aputure Amaran HR672C LED studio light which is mysteriously killing batteries and falsely indicates charging when no batteries are installed. And salvaging the spare part from an old dumpster laptop! Forum: https://www.eevblog.com/forum/blog/eevblog1460-interesting-repair-of-an-aputure-amaran-led-studio-light/

Is it worth salvaging parts from a consumer HP office Inkjet Printer/Scanner from the dumpster? Forum: https://www.eevblog.com/forum/blog/eevblog-1459-is-it-worth-parts-salvaging-an-inkjet-printerscanner/

Can’t see those pesky laser etched part numbers on chips? Dave demonstrates what’s happening with the microscope polarising filter lenses on Twitter that’s blowing people’s minds. Does it actually work? And other tricks of the trade. https://twitter.com/azonenberg/status/1494061604161220615 https://twitter.com/ghidraninja/status/1494343655053832203 Aputure Amaran AL-M9 LED light https://amzn.to/3H0O5KW Leica microscope brochure: https://downloads.leica-microsystems.com/Leica%20LED3000%20RL/Brochures/Leica%20LED3000-5000_Brochure_EN.pdf Forum: https://www.eevblog.com/forum/blog/eevblog-1458-microscope-polarising-magic!/

Old school mailbag. Forum: https://www.eevblog.com/forum/blog/eevblog1457-old-school-mailbag/ SPOILERS: 00:00 – Old School Mailbag 01:09 – TOASTY Quadcopter ESC 08:07 – The best XMAS Tree LED light yet https://www.elimo.io/ 11:26 – Kaiweets ST600Y Multimeter https://s.click.aliexpress.com/e/_ALpSqJ 16:00 – UK Radio Teleswitch Protocol: http://downloads.bbc.co.uk/rd/pubs/reports/1984-19.pdf

Repairing a Sega Toys Deathstar, err, Homestar Flux Planetarium https://amzn.to/3BsaIH7 Forum: https://www.eevblog.com/forum/blog/eevblog-1456-sega-toys-homestar-planetarium-repair/

Electrolytic capacitors produce current when they are reflow soldered! Enough to possibly light up a high efficiency LED. What is going on? A initial investigation with experiments and measurements. https://twitter.com/GregDavill/status/1491235709071818752 00:00 – WTF? 01:42 – Practical experiment heating up an electrolytic capacitor 07:37 – Data logging 09:55 – Analysing the spreadsheet graph Forum: https://www.eevblog.com/forum/blog/eevblog-1455-capacitors-produce-current-during-reflow-soldering-wtf/

Another Indiegogo marketing takedown. Kara Pure raised $1M for a water-from-air dessicant dehumidifier that costs US$1800 uses a $20 alkaline mineral filter to give you tasty filtered water for the cost only 14kWh/day in energy, at best. So dumb it hurts. https://www.alibaba.com/product-detail/ALK-alkaline-water-filter-cartridge_62009370049.html https://www.indiegogo.com/projects/kara-pure-make-pure-water-from-the-air Forum: https://www.eevblog.com/forum/blog/eevblog-1454-water-from-air-again-the-kara-pure/

Teardown of the Elgato Key Light https://amzn.to/3oqObEW Forum: https://www.eevblog.com/forum/blog/eevblog-1453-elgato-key-light-teardown/

Repairing the Fluke/Philips PM3370B combiscope. Or have we? Service manual with schematic: https://www.manualslib.com/manual/1441823/Fluke-Autoranging-Combiscope-Pm3370b.html Forum: https://www.eevblog.com/forum/blog/eevblog-1452-fluke-pm3370b-combiscope-repair/

Showing you all the tools and techniques I use to shoot videos. Cameras, lighting, sound, streaming, editing, macro phototography, microscopes, green screen, and ATEM live production system. Locals: https://locals.com/member/EEVblog

No Script, No Fear, All Opinion

A BM235 customer has a BM235 that drains the batteries in OFF switch mode, lets look at the PCB to find out the possible culprits. Potentially applicable to any battery powered product. Forum: https://www.eevblog.com/forum/blog/eevblog-1449-what-causes-excess-battery-drain-(bm235)/

How to convert a Fluke 77 IV average responding multimeter into a True RMS model 177 for 10 cents. *Plus calibration gear Should also work for converting a Fluke 83V to 87V True RMS measurement vs Average Responding And how to calibrate a Fluke multimeter. Fluke 87V service manual with schematic: https://xdevs.com/doc/Fluke/87V/Fluke_87V_Full_service_manual_with_schematic_and_electrical_parts_list_Service_Manual-87VANFullService.pdf 00:00 – Hacking ...

No Script, No Fear, All Opinion