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EEVblog #1248 – INSANE! A 0.02% Process Meter for $9? WTF!

Dave found this crazy bargain of the century no-name $9 0.02% class multifuction process calibrator on Aliexpress. Is it any good? Actually, it’s an AIMOmeter AMPX1 that sells for over $200 on ebay, so what gives? How can they possibly manufacture and sell a 0.02% class device for under ten …

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EEVblog #1247 – DDR Memory PCB Propagation Delay & Layout

When does PCB propagation delay matter in PCB layout? Dave goes down the rabbit hole from DIY TTL processor design to DDR memory design and layout. DDR memory termination. What is a timing budget? When is it important? How does signal integrity matter? When do you have to do serpentine …

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EEVblog #1244 – Mailbag

More Mailbag! Forum HERE SPOILERS: Mailbag SPAM! Arizona If it smells like chicken, you’re holding it wrong. 2:57 https://www.tympan.org Open source hardware audio hearing development system. 11:20 Circuit Scribe conductive ink learning kit https://www.circuitscribe.com/ 24:20 Sony RM-440 video editing unit teardown 30:42 Pulse Sensor https://www.pulsesensor.com 31:36 DIY Mouse Kit https://github.com/biomurph/Mouse …

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EEVblog #1240 – Tandy In The 1980’s

Go back in time to 1980 and a look at what consumer electronics and parts were available from Tandy in the UK. 1980’s Tandy Voice Recognition Chip: https://www.youtube.com/watch?v=kFth9K_IvwA Dick Smith’s new channel: https://www.youtube.com/watch?v=80seR-2BPyk Forum HERE Podcast: Download

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EEVblog #1239 – Mailbag

More Mailbag! Forum HERE SPOILERS: Dodgy Plugpack Teardown & Discussion 9:40 eSATA cage thingo teardown 11:47 Ford Car Stereo teardown 18:34 Back To The Future Delorean Time Circuits https://www.marmosetelectronics.com/time-circuits-clock/time-circuits-clock-the-control-board/ 23:39 E-con Systems USB3 Camera Module: https://www.e-consystems.com/usb-cameras/full-hd-low-light-usb-camera-with-stereo-mic.asp Podcast: Download

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EEVblog #1238 – Vion: The World’s Worst Multimeter!

You think a $2 multimeter is bad? A review of the Kickstarter & Indiegogo Vion bluetooth multimeter that promised the world. Grab your popcorn for a master class in idiotic product design. The world’s worst multimeter. The original thread Forum HERE Podcast: Download

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EEVblog #1235 – DSO Alternate Trigger Trickery

Most modern DSO’s don’t have Alternate Triggering, but Dave shows you how to do it anyway! This allows you to trigger on and view and anaylse two otherwise asynchronous time un-correlated signals on the screen at once. Also a look at Dual Time Base oscilloscopes. Oscilloscope Tutorial Video Playlist Forum …

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