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 …
Read More »EEVblog #1207 – ARM Dev Boards Falling From The Sky!
Hackable STM32 based ARM RF dev boards are literally falling from the sky! A teardown of two weather balloon Vaisala radiosondes, the RS41 and RS92. Repurposing tre RS41: http://www.om3bc.com/docs/rs41/rs41_en.html Github: https://github.com/bazjo Paper on capacitive humidity sensors: https://pdfs.semanticscholar.org/0728/24b548d91516d765c4b7facdceb350d61cdd.pdf Podcast: Download
Read More »EEVblog #1206 – Repair: Sony NEX VG30 Video Camera
Dave’s Sony NEX VG30 camera, err, well, it broke… A quick partial teardown and fix. And a quick talk about the cameras Dave uses for the blog. Sony NX80 Sony A6300 Sony RX100 MKIV Forum HERE Podcast: Download
Read More »EEVblog #1205 – RC2014 Z80 Computer Kit Build
Sagan assembles the RC2014 Mini retro Z80 computer kit running Microsft BASIC from 1978. But will it go to plan? Power up, testing and troubleshooting at 23:00 Forum: http://www.eevblog.com/forum/blog/eevblog-1205-rc2014-z80-computer-kit-build/ Sagan’s first time soldering: https://www.youtube.com/watch?v=EjpUYGRXzRQ Podcast: Download
Read More »EEVblog #1204 – Samsung Galaxy Fold Failure – Analysis
The new Samsung Galaxy Fold a folding OLED smartphone has failed spectacularly in the hands of early reviewers! What went wrong? Also, a rant about the pressures on reviewers from the manufacturers, Dave questions why Marques Brownlee won’t show his failure footage. 3M Flexible OLED testing presentationFlexible OLED 2011 article …
Read More »EEVblog #1203 – REPAIR: Tektronix 2465B Oscilloscope
Dave repairs a classic Tektronix 400MHz 2465B oscilloscope that’s been sitting on the mailbag shelf for years. Arguably the greatest analog oscilloscope ever made. BONUS magic smoke escape! Although it was repaired to a functional level, this is kinda Part 1, as not all functions were exercised and tested, and …
Read More »EEVblog #1202 – LCD Repair Redux
The previous LCD repair didn’t last very long. Redux time. Installing a new 240×64 LCD module in the PM300 Power Analyser wasn’t exactly a walk in the park. Podcast: Download
Read More »EEVblog #1201 – Nobel Laureate in the EEVBlog Lab!
Surely the world’s only Nobel Laureate electronics hobbyist! Dr Barry Marshall, winner of the 2005 Nobel Prize for Medicine visits the EEVblog lab to sniff some vintage gear and discuss his Nobel prize winning discovery and treatment for stomach ulcers. Dr Marshall discovered that Helicobacter Pylori bacteria was responsible for …
Read More »EEVblog #1200 – BUSTED! – Energizer & Duracell NiMH
Are you getting ripped off with Energizer and Duracell D cell NiMH rechargeable batteries? Why is a D cell NiMh the same capacity or lower than the smaller C or even AA cell? Teardown time! Forum HERE Podcast: Download
Read More »EEVblog #1199 – Samson C01U USB Microphone Teardown
Teardown Tuesday Dave’s Samson C01U USB Microphone got caught up in the flood, let’s take a look inside. Forum HERE Podcast: Download
Read More »EEVblog #1198 – 10 Years On Youtube!
April 4th 2009 Dave started the EEVBlog Forum HERE Podcast: Download
Read More »EEVblog #1197 – DIY PCB Etching With Water
Experimenting with etching your own PCB’s by concentrating existing ferric chloride levels in tap water. How well does it work? Forum HERE Podcast: Download
Read More »EEVblog #1196 – Custom Heat Sink Design
Designing your own custom heat sink is cheaper and easier than you might think. At look at why you might want to design your own heat sink, the costs, the advantages and disadvantages, design considerations for surface mount PCB’s, air convection, and mechanical DRC, and die-cast vs machining. SMD thermal …
Read More »EEVblog #1195 – Sony 4K 60″ LCD TV Audio Repair
Mrs EEVblog broke the headphone socket on Dave’s Sony TV. Soldering iron time. Podcast: Download
Read More »EEVblog #1194 – 1985 Electronics
Dave uncovered the first edition of Australian Electronics Monthly magazine from July 1985, by Roger Harrison, and featuring a classic David Tilbrook MOSFET amplifier design, vintage computer, vintage analog scopes and more. Forum HERE Podcast: Download
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