Dave investigates the ionic electro-chemical resistance of some Alkaline batteries under light multimeter input loading and an unusual physical battery phenomena, and explains how it differs drastically from the datasheet internal resistance value. He also finds a surprising result showing two types of Alkaline battery construction with different properties. It demonstrates the usefulness of a high resolution bench multimeter. Forum: http://www.eevblog.com/forum/blog/eevblog-515-battery-ionic-resistance-investigation/ EEVblog Main Web Site: http://www.eevblog.com EEVblog Amazon Store: http://astore.amazon.com/eevblogstore-20 Donations: ... https://www.youtube.com/watch?v=fJSNAyMmNGk

Fronos! Hacking a dumpster Sonos Play 5 Gen 1 speaker to remove all the evil software locking and turn it into a dumb speaker with just line-in and basic wireless Bluetooth. Integrating a new Fosi Audio ZX-TB21 2+1 amplifier. https://amzn.to/3USD7xQ Sonos, the Juicero of wireless speakers: https://www.youtube.com/watch?v=lLyjvXAJcLM Forum: https://www.eevblog.com/forum/blog/eevblog-1519-free-your-sonos-speaker!-(hack)/ Support the EEVblog on: Patreon: http://www.patreon.com/eevblog Odysee: https://odysee.com/@eevblog:7 Web Site: http://www.eevblog.com EEVblog2: http://www.youtube.com/EEVblog2 EEVdiscover: https://www.youtube.com/eevdiscover AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog #ElectronicsCreators #Hack #Sonos ... https://www.youtube.com/watch?v=IeIk-4ItQ70

Dave responds to the furore over his thumbs up rating on the Agilent U1253A Multimeter And it's all about the love, really. ADDED COMMENT: Agilent make the exact same meter in an LCD version (U1251A or U1252A) with longer battery life. So you get the choice of display vs battery life! ... https://www.youtube.com/watch?v=vyx6kAdHzhg

Dave demonstrates FIVE different easy methods to crack into a cheap Sandleford safe he found in the dumpster, WITHOUT using physical force. Including a bonus 6th method that doesn't work on this one. Don't buy cheap hardware store safes, they are garbage! Also advice on what to look for in a good quality home security safe. 00:00 - Don't buy cheap harwdare store safes! 00:47 - The Default Code 01:29 - Picking the cheap wafer lock 02:42 - Bumping the safe 03:28 - How bumping works. A look inside the mechanism 06:35 - Just punch out the cheap lock 07:11 - Coathanger attack 08:24 - They tried to prevent it and STILL failed! LOL 09:23 - Solenoid & Reset code wire attack 11:42 - The physical construction is just LAUGHABLE! 12:36 - Magnetic attack 13:03 - LOL I locked myself out & have to pick it again! 13:41 - So what IS a good quality safe? 16:35 - TDR Safes 17:50 - Inside a good quality key lock safe 19:12 - Conclusion Forum: https://www.eevblog.com/forum/blog/eevblog-1494-5-ways-to-open-a-cheap-safe/ Support the EEVblog on: Patreon: http://www.patreon.com/eevblog Odysee: https://odysee.com/@eevblog:7 Web Site: http://www.eevblog.com EEVblog2: http://www.youtube.com/EEVblog2 EEVdiscover: https://www.youtube.com/eevdiscover AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog #Safes #lockpicking #locksmithing ... https://www.youtube.com/watch?v=Y6cZrieFw-k