Fundamentals Friday Dave answers a beginner forum question of why their 74HC390 based breadboard counter circuit does not work properly. Let's get up to our armpits in datasheets and troubleshooting. A two sentence forum response turned into a step-by-step 27min video investigation involving rise and fall times, setup and hold times, metatability, optocouplers, bypassing, open collectors, and breadboard connector traps for young players.
Full coverage of Electronex 2012 in Sydney
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Some Indiegogo campaigns are fraudulently using the EEVblog logo (among others) as "Featured In" in order to trick consumers into believing the project is popular and has been mentioned/endorsed by these companies.
The V-White 360 Automatic Toothbrush
https://www.indiegogo.com/projects/v-white-teeth-whitening-360-automatic-toothbrush--2/x/3963035#/
You can just buy this crap on Aliexpress already, even with the V-white branding!
https://www.aliexpress.com/item/2018-New-Sonic-Adult-Electric-Toothbrush-Wireless-Charging-360-Degree-Oral-Teeth-Whitening-Automatic-tooth-Brushing/32855364956.html
Indiegogo supposedly take Copyright & Trademark infringement "seriously", but they have done nothing to remove the EEVblog logo
https://support.indiegogo.com/hc/en-us/articles/217205168-Copyright-Trademark-and-Patents
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https://www.youtube.com/watch?v=noNyZ2A3k4Q
How to make your own magnetic H-field EMC probe out of semi-rigid coax for $10 that performs identically to a $300 commercial probe!
Search for "Low noise amplifier" and "semi-rigid rg402" on ebay.
Forum: http://www.eevblog.com/forum/blog/eevblog-1178-build-a-$10-diy-emc-probe/
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Four reasons why autonomous pizza delivery robots will FAIL.
And nope, they won't save the environment either.
But maybe I'm wrong?
Magna are trialing a pizza delivery robot in Manhatten.
And another "last mile" delivery boondoggle called Pipedream, delivering packages via 12" pipes.
https://i.pipedreamlabs.co/
https://twitter.com/eevblog/status/1516598333804265473
Forum: https://www.eevblog.com/forum/blog/eevblab-102-last-mile-autonomous-robot-deliveries-will-fail/
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#ElectronicsCreators #pizza #delivery
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Dave replaces a cracked 5th gen iPad touch screen. Content rock bottom? But child happy, and one less new iPad that needs to be manufactured.
Forum: https://www.eevblog.com/forum/blog/eevblog-1255-apple-ipad-5th-gen-screen-repair/
#Apple #iPad #Repair
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Teardown of a Cadex C7000 commercial battery analyser.
Forum: https://www.eevblog.com/forum/blog/eevblog-1434-cadex-c7000-battery-analyser-teardown/
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https://www.youtube.com/watch?v=7JAuXQWvGlg
Forum Topic: http://www.eevblog.com/forum/blog-specific/eevblog-344-fluke-17b-multimeter-teardown/
Teardown Tuesday
What's inside the cheap Made-in-China Fluke 17B Mulitmeter
NOTE: This meter is only available in the China and Indian markets. But you can get it from Chinese dealers on Ebay.
Thanks to http://www.toddfun.com
SIBA Fuse used: http://www.download.siba.de/pdf/artikel/SIBA-GSS-7017240.pdf
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What's inside the Trezor hardware bitcoin wallet?
A teardown to look at any physical hardware security, and a look at a possible side channel power line attack.
http://amzn.to/2uk2ccP
https://kit.com/EEVblog/crypto-hardware
UPDATE: A technical detailed reply from the Trezor developer!
http://www.eevblog.com/forum/blog/eevblog-1006-trezor-bitcoin-hardware-wallet-teardown/msg1255268/#msg1255268
CLARIFICATION: SatoshiLabs does not hold your wallet private key, it is encoded on the hardware with your custom PIN. Satoshi Labs only holds the private keys for the signing of the firmware.
Forum: http://www.eevblog.com/forum/blog/eevblog-1006-trezor-bitcoin-hardware-wallet-teardown/
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https://www.youtube.com/watch?v=BzxGoJdd8a4
Dave continues the investigation into repairing the HP 35670A Dynamic Signal Analyser. This time using the Flir E8 thermal camera to check for any overheating components on the suspect A5 analog board.
Part 1: http://www.youtube.com/watch?v=YwiZROj3SSI
Part 2: http://www.youtube.com/watch?v=7dd_A28gtzY
Part 3: http://www.youtube.com/watch?v=orYJFKQDZLo
Forum: http://www.eevblog.com/forum/blog/eevblog-540-hp35670a-dsa-repair-part-3-28411/
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