EEVblog

Dave caught a rare sight, an alkaline battery leakage in the potassium hydroxide liquid form before it had time to crystalise. This time in a Made in USA Energizer Max Plus AAA alkaline battery. Forum: https://www.eevblog.com/forum/blog/eevblog-1349-energizer-battery-leakage-made-in-usa/

A look at and teardown of the world’s first IBM PC compatible PC, the Compaq Portable. Also some meter and oscilloscope part 1 repair action… Forum: https://www.eevblog.com/forum/blog/eevblog-1348-worlds-first-ibm-compatible-pc-the-compaq-portable/

New SMD Thermal Jumper parts could radically change your PCB thermal designs! https://www.vishay.com/docs/60157/thjp.pdf https://atceramics.com/userFiles/uploads/pdfs/Q-BRIDGE.pdf Forum: https://www.eevblog.com/forum/blog/eevblog-1347-smd-thermal-jumpers-could-be-game-changing!/ This is a follow-on from the original SMD Thermal Design video: https://www.youtube.com/watch?v=2ygnAv6koSQ

Dave tears down and investigates a Dell infrared IR optical touch screen monitor found in the dumpster. Infrared touch screen are not often used in consumer computer monitor applications compared to resistive and capacitive touch screen technologies. Forum: https://www.eevblog.com/forum/blog/eevblog-1346-how-an-infrared-optical-touch-screen-works/

Dave fixes a thermal issue with his old video editing laptop, a HP Pavilion dv7 Forum: https://www.eevblog.com/forum/blog/eevblog-1345-hp-dv7-laptop-repair/

Custom storage shelves for under the bench in the new lab. Using an online flat pack custom shelving and storage ordering system, and assembly. Forum: https://www.eevblog.com/forum/blog/eevblog-1344-custom-lab-storage-shelves/

An update from EEVblog #50 (yes, #50!) The CREE XPG LED’s on the deck finally died and Dave needs a replacement, so time to hack some existing T8 LED tube lights. Forum: https://www.eevblog.com/forum/blog/eevblog-1343-dead-deck-cree-leds/

Symmetrical Dumpster PC Stacking, just like the Norwest mass turbulence of 1984. Dave’s been dumpster diving again for small form factor PC’s. Forum: https://www.eevblog.com/forum/blog/eevblog-1342-symmetrical-dumpster-pc-stacking/

Teardown of a $250,000 1991 vintage IBM 9121 TCM Processor module from a System/390 ES9000 Enterprise Server mainframe computer,. Amazing state of the art 63 layer ceramic hybrid module construction with 2772 pins! And Dave demonstrates an amazing BGA desoldering technique that can only be done on these ceramic hybrid PCB’s. TCM PDF: https://eevblog.com/files/ibm-system390-air-cooled-alumina-thermal-conduction-module.pdf Forum: ...

Dave explains why Tesla have switched from a 2170 cell to a bigger 4680 cell announced at Battery Day. What is the new tabless technology and what are the thermal cell and battery pack implications? Discussion on Lithium Ion battery cell construction, chemistry, manufacture, thermal design, internal resistance, heat sinking, and how cylindrical cells compare ...