EEVblog

Dave’s local shopping centre just installed shopping trolleys with electronic locking wheels fro ma company called Gatekeeper System, how does it work? Teardown time! Subscribe on Library: https://lbry.tv/$/invite/@eevblog:7 FCC website: https://fccid.io/SOX-W9200/ Forum: https://www.eevblog.com/forum/blog/eevblog-1287-gatekeeper-shopping-trolley-lock-investigated/ Podcast: Download

What is “Design by Inspection” Dave answered what he thought was an obvious forum question, but to beginners it’s not so obvious. Rather than build something up and test, let’s do design by inspection. Subscribe on LBRY: https://lbry.tv/$/invite/@eevblog:7 Forum: https://www.eevblog.com/forum/blog/eevblog-1285-how-to-do-design-by-inspection/ Podcast: Download

More Mailbag! Subscribe on LBRY: https://lbry.tv/$/invite/@eevblog:7 Forum: https://www.eevblog.com/forum/blog/eevblog-1286-mailbag/ SPOILERS: BENQ Screenbar Plus monitor desk light: https://amzn.to/37BTXIO 12:27 Circuitmess Ringo DIY Mobile Phone Kit https://www.circuitmess.com/ringo/ 23:14 Essential Electric Circuits book: https://amzn.to/32elSxz 29:45 Chumby teardown! 38:02 SPO256-AL2 Speech Allophone chip 41:47 PCB business card Podcast: Download

Let’s save 30 cents/unit and stuff the environment! How can bad and cheap product design kill the environment by requiring vastly more energy generation, delivery and PF correction infrastructure? Dave looks at the shockingly energy wasteful design of mains powered smoke alarms. Subscribe on LBRY: https://lbry.tv/$/invite/@eevblog:7 Forum: https://www.eevblog.com/forum/blog/eevblog-1284-how-bad-product-design-kills-the-environment/ Podcast: Download

What is Mains Ripple Injection and control? A mystery bunker item teardown turned out to be a very interesting and obscure bit of test kit. Subscribe: http://www.eevblog.tv Forum: https://www.eevblog.com/forum/blog/eevblog-1283-what-is-mains-ripple-injection/ Podcast: Download