Another movie length Mailbag. What have people sent in this week? Forum: http://www.eevblog.com/forum/blog/eevblog-735-mailbag/ SPOILERS: Why are cheap Ebay LED light bulbs so bad? Dave investigates why some of them are doomed to fail. DaveCAD and thermal camera time. Datasheet for example LED CPM700 Countersurveillance unit from Research Electronics Inc for …
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Meet David2, the first EEVblog employee.
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Dave takes a quick look at the first run Kickstarter developer prototype 360 degree waterproof HD camera from Giroptic It produces real time 360deg 30fps MP4 video with spatial audio 360deg video on youtube is HERE Kickstarter Project http://360.tv/ Forum HERE Podcast: Download
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Mailbag time again. What have people sent in this week? SPOILERS: AUD$5500 transfer standard 10k resistor in a box from Wekomm! Holy Xeon ECC server memory Batman! AC/DC Back To The Future T-Shirt HeartSine Samaritan Pad Heat Defibrillator K band radar system Forrest Mims Radio Shack books Forrest Mims Amp …
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Fundamentals Friday What is Sheet Resistance? Did you know that the resistance of a square copper PCB trace is the same regardless of the size? Dave explains the theory behind this rather counter-intuitive concept called Sheet Resistance, and demonstrates that it is in fact true. What is the ohms per …
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Youtube are offering a new paid subscription service for viewers who want to watch their videos ad-free. The catch for Youtube Partners & Content Producers is that it looks as though this is *compulsory* to join and agree to in order to continue to get monetisation on your videos! Dave …
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Inside the new Keithley DMM7510 7.5 Digit Bench Multimeter What gives this unit it’s superb 14ppm/1year accuracy specification? What construction techniques have they used? How and why are Fluke so heavily involved? What considerations are given to the power supply and isolation aspects? How does it compare with the cheaper …
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How ceramic backed precision thin film resistor networks are constructed and laser trimmed. Examples come from the resistor networks in the 7.5 digit Keithley DMM7510 Multimeter, manufactured by Fluke. Forum HERE Podcast: Download
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The Google Brain project with 1000 servers (16,000 cores) simulating a model of a brain with a billion synapses analysed 10,000,000 200×200 images over 3 days from Youtube, and out pops Dave’s head! Scary…
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Dave talks about Tektronix’s new unreleased AGO3000 Gravity Compensated Oscilloscope with a high precision TCXO timebase with 2G tip-over gravity compensation. Datasheet Preliminary product launch page Forum HERE
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Another lengthy mailbag, with plenty of diverse stuff. RCA Airnergy Bullshit Video Forum HERE SPOILERS: Kan Jam flying disc Psion 3A Organiser 1974 808 RapidMan Calculator made in Canada. Russian IN-9 Neon bargraph display tube. Datasheet Info & characteristic curves Wifi cellphone battery charging bullshit Kickstarter RF Energy Harvesting. Can …
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A quick rant on T4 fluorescent tubes, and a small upgrade to replace a T4 tube with a LED strip. Previous video on LED lighting Dave’s back deck Forum HERE Podcast: Download
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25 years in the making, the bible of electronics is now in it’s 3rd edition. That is all. Forum HERE
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It’s all fun and games until an innocent opamp gets hurt! Dave proves he’s not the sharpest tool in the shed by killing an opamp in his µCurrent calibration test jig, whilst checking the calibration of course. Doh. Forum HERE Podcast: Download
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Dave builds and tests the 24 core dual processor 2.6GHz Intel Xeon E5-2630 v2 video editing machine and benchmarks against his current 8 core i7 3770K machine at 3.5GHz. This is one hour of PC building and software testing, if you find this stuff boring, DON’T WATCH IT! Forum: http://www.eevblog.com/forum/blog/eevblog-726-dual-xeon-video-editing-machine-build/ …
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