https://stream.echo6.co/videos/watch/d72935f4-47ee-4374-b62d-1ebff76a2b29 Another movie length Mailbag. What have people sent in this week? Forum: http://www.eevblog.com/forum/blog/eevblog-735-mailbag/ SPOILERS: Why are cheap Ebay LED light bulbs so bad? Dave investigates why some of them are doomed to fail. DaveCAD and thermal camera time. http://www.qt-brightek.com/datasheet/QBLP679E-IWK-XX.pdf CPM700 Countersurveillance unit from Research Electronics Inc for cold war spy bug sweeping. Cheap Ebay voltage sources for multimeter calibration Raspberry Pi I/O Hat Kickstarter, the Hatilogico: https://www.kickstarter.com/projects/jelby/hatalogico-for-the-raspberry-pi Industrial RS232 modem teardown Bricked Assus TF300 Transformer Tablet Annoy-a-tron Belkin router teardown Cypress Parachute Automatic Activation Device. Previous video teardown on this: https://www.youtube.com/watch?v=9-wzPTiLz5c EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog EEVblog Amazon Store (Dave gets a cut): http://astore.amazon.com/eevblogstore-20 Donations: http://www.eevblog.com/donations/ Projects: http://www.eevblog.com/projects/ Electronics Info Wiki: http://www.eevblog.com/wiki/ Sun, 17 May 2026 05:33:08 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/d72935f4-47ee-4374-b62d-1ebff76a2b29 All rights reserved, unless otherwise specified in the terms specified at https://stream.echo6.co/about and potential licenses granted by each content's rightholder.