Dave tears down and attempts repair on a 1989 vintage Acorn Archimedes A3000 Computer, using the very first ARM processor, the Acorn RISC ARM v2 Service manual: http://acorn.chriswhy.co.uk/docs/Acorn/Manuals/Acorn_A3000SM.pdf Reference Manual: http://acorn.chriswhy.co.uk/docs/Acorn/Manuals/Acorn_A3000TRM.pdf Schematics: http://acorn.chriswhy.co.uk/docs/Acorn/Manuals/Acorn_A3000TRM_drawings.zip Forum: http://www.eevblog.com/forum/blog/eevblog-507-the-first-arm-computer-acorn-archimedes-a3000/ EEVblog Main Web Site: http://www.eevblog.com EEVblog Amazon Store: http://astore.amazon.com/eevblogstore-20 Donations: http://www.eevblog.com/donations/ Projects: http://www.eevblog.com/projects/ Electronics Info Wiki: http://www.eevblog.com/wiki/

The Lily Drone company has folded, admitted defeat, and will not deliver after 3 years, $30M in pre-sales plus $15M in VC funding. What a spectacular FAIL! https://www.lily.camera/adventure-comes-end/ IMPORTANT: This video clearly falls under the category of "Nominative use" a.k.a "Trademark Fair Use" under the (1992) U.S. Court of Appeals for the Ninth Circuit. There is no other way to report the news without using the company name. And there was no suggestion of endorsement or sponsorship. UPDATE: Lawsuit from the District Attorney: https://techcrunch.com/2017/01/12/sf-district-attorney-lawsuit-against-lily-may-have-prompted-refund/ And refunds might not happen, they owe the bank: https://www.suasnews.com/2017/01/the-people-vs-lily-robotics/ Forum: http://www.eevblog.com/forum/blog/eevrant-lily-drones-folds-after-$30m-in-pre-sales/ EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog EEVblog Amazon Store (Dave gets a cut): http://astore.amazon.com/eevblogstore-20 T-Shirts: http://teespring.com/stores/eevblog

Fundamentals Friday. Dave explains Gain Bandwith Product and how it's possible to increase your system bandwidth by cascading opamps in series. Also, a discussion on the associated noise issues. A breadboard example shows how variable GBWP can be, and how it can relate to distortion. Opamp Noise Tutorial: http://www.youtube.com/watch?v=Y0jkPLuFdnM Forum: http://www.eevblog.com/forum/blog/eevblog-572-cascading-opamps-for-increased-bandwidth/ EEVblog Main Web Site: http://www.eevblog.com EEVblog Amazon Store: http://astore.amazon.com/eevblogstore-20 Donations: http://www.eevblog.com/donations/ Projects: http://www.eevblog.com/projects/ Electronics Info Wiki: http://www.eevblog.com/wiki/

Is a $7 LCR Meter / Component Tester from Ebay any good? Dave tests the M328 (LCR-T4) model component tester. HUGE Forum Thread: https://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/ Forum summary videos here: https://www.youtube.com/watch?v=on1ZrWNt2Us This group seems to maintain a version of the firmware: https://www.mikrocontroller.net/articles/AVR_Transistortester EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ EEVblog Amazon Store (Dave gets a cut): http://astore.amazon.com/eevblogstore-20 T-Shirts: http://teespring.com/stores/eevblog