EEVblog

Dave scores a HP R1500 G3 rack mount Uninterruptible Power Supply (UPS) from the dumpster. Teardown time! Forum: http://www.eevblog.com/forum/blog/eevblog-1168-dumpster-diving-ups/

A quick chat about Innovation Patents vs Invention Patents for another video quickly turned into 30 minutes of general talk about patents, the patent system, patent applications, patent attorneys, over-unity free-energy quackery, the claims and examination process and a host of other stuff, with patent attorney Dr Phil Burns. Forum HERE

DejaVu. Dave revisits the new generation Cypres 2 parachute Automatic Activation Device and tears it down. A safety device that automatically activates your parachute at a pre-set altitude. It has saved over 4000 lives to date. Forum HERE

A dual layer touch screen calculator watch in 1983? Amazing! Teardown of the rather obscure Casio TC-500 Forum HERE

A retro look at the 2005 Xbox 14 million unit power cord replacement issue and a teardown and analysis of the supplied protection device from Microsoft. Some interesting engineering lessons to be learned. UPDATE: Apparently what this is an “Arc Fault Circuit Interrupter” (AFCI) that continually monitors the current for the presence of arcs caused ...

Xmas Mailbag SPOILERS: Mand Labs electronics learning kit: (yes, 27 minutes of it) 27:08 Petzl climbing harness 33:20 RC2014 home brew DIY Z80 computer kit on Tindie 39:00 Custom test leads 40:40 Aircraft 121.5MHz emergency beacon and altitude sensor teardown 51:30 Monero miner, and some Linux GPL hate! EPIRB Teardown: https://www.youtube.com/watch?v=QVAQONKyMv8 Petzl harness gear loop ...

Review and teardown of Little British Monitors, a small compact bluetooth monitor available as a kit on Kickstarter Forum HERE

Teardown Tuesday-ish random dumpster dive! What parts can we salvage from and automated coffee machine? and how does it work? Forum HERE

One item mailbag! A look at the Swissmicro DM42, the world’s most precise pocket calculator. A clone and improvement of the famous HP42S, with open source firmware based on the Free42 platform. https://www.swissmicros.com/dm42.phphttp://thomasokken.com/free42/ Forum HERE

PCB mod boards are useful for a whole range of applications and scenarios from production to upgrades, repair, and hacks. Dave shows you several examples and talks about creating manufacturing panels for them, along with castellations, V-Scoring, routing, and manufacturability. Forum HERE

A look at the dual bipolar transistor zener clamp circuit, and it’s usefulness as a fast low leakage overload clamp. The first part is lifted from video #1000 with 12 minutes of extra commentary. Interview with Dave Taylor, designer of the famous Fluke 8060A multimeter Forum HERE

A look inside the die-cast alloy Focal Professional CMS40 active nearfield studio monitor speakers. Forum HERE

More from the Mailbag. MailbagPO Box 7949Baulkham Hills NSW 2153AUSTRALIA SPOILERS:CrowPi Raspberry Pi Learning kitAnd scratch programming.Mr FusionPlay With Junk Youtube channelLED Claytons Nixie Clock kit & Muzio – Music Reactive Led LampSipeed MAIX : The World First RISC-V 64 AI Module for edge computing:Spacial microphone array and video camera face tracking demos

A surprising fault in the 4K LG Dumpster TV. Using the block diagram and schematic to track down the likely culprit and reflowing the BGA’s in an attempt to fix the fault. Forum HERE

Let’s do some programming, early 1970’s style with a teardown of the Canon Canola SX-100 Programmable Calculator Forum HERE