EEVblog

What’s inside the Ericsson / LG IPECS PABX left behind in Dave’s new lab. Along with a Jabra Bluetooth headset Forum HERE

What difference does a 4 layer PCB make to EMC radiated emissions compared to an identical 2 layer PCB? And why? Dave does H-Field near-field probe testing on two otherwise identical PCB’s. Electromagnetic waves and the difference between near field and far field, and H-Field and E-field probes and wave impedance is also explained. The ...

Some of the most commonly asked questions: How do you become a professional electronics engineer?Can you be a professional engineer without a degree?How do you get an engineering job or contract job? The different grade of engineering are also explained. Professional engineers, Engineering Technologists, and Associate Engineers. https://www.oregonlive.com/news/2018/12/federal-judge-finds-state-law-governing-who-is-an-engineer-violates-free-speech.html Forum HERE

Teardowns of the Rohde & Schwarz HMP4040, HMP2020, and NGE103 programmable lab power supplies. Comparisons with other brand PSU’s: There are some comparisons with other brand PSUs https://www.rohde-schwarz.com/brochure-datasheet/hmp/ https://www.rohde-schwarz.com/au/product/hmp4000-productstartpage_63493-47360.html https://www.rohde-schwarz.com/au/product/nge100-productstartpage_63493-387267.html Forum HERE

Rohde & Schwarz were offended at the quality of the power supplies in the EEVblog lab, so sent in some “real” lab power supplies! Unboxing and first look at the Rohde & Schwarz HMP4040, HMP2020, and NGE103 programmable lab power supplies. Comparisons with other brand PSU’s: There are some comparisons with other brand PSUs: https://www.rohde-schwarz.com/brochure-datasheet/hmp/ ...

A follow-up to the Yihau/WEP SMD Station Meltdown, testing the heater drive TRIAC and looking at the brushless DC fan motor. And how a TRIAC and SCR works. DaveCAD github Forum HERE

David2’s Yihau/WEP 898D+ SMD rework station literally melted down! Autopsy time. Forum HERE

How did you connect to a time sharing computer in 1972? Teardown of the Texas Instruments TI Silent 700 model 745 terminal with acoustic coupler modem. Forum HERE

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