Dave flips the bird. A 1970’s Mattel car racing game. Sex on a stick multimeter probes. Sagan, Mrs EEVblog, and a whole lot more in today’s Mailbag Monday Bob Widlar poster Easy EDA Channel Engineer on Youtube We Make Things http://felitek.de/ http://www.probemaster.com/ Forum HERE Podcast: Download
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Doug Ford, former head designer from Rode Microphones continues with Part 2 of the microphone technology series by explaining the construction of noise cancelling Figure 8, cardioid, and hyper cardioid microphones. Also, how the polar patterns and responses relate to the physical construction, and how the frequency response is affected. …
Read More »The EEVblog dedicated server which hosts this site and the forum went down for most of today. It was not a fault of the server itself, but a major outage for all dedicated servers hosted with HostGater, the company I use that provides the server. Here is some info Sorry …
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The obligatory “before” video showing Dave’s Sinclair C5 electric “car” and its poor condition before commencing restoration work. Podcast: Download
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What’s inside a Dräger Multiwarn II gas detection warning system used in mining, oil, chemical, and emergency services etc to detect hazardous or explosive atmospheres. Intrinsic safety design and how both catalytic bead and infrared IR gas detectors work, and pellistors. And a teardown of a Hydrogen Sulfide (H2S) sensor. …
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In the first of a series of videos tutorials on microphones, Doug Ford, former head designer at Rode Microphones explains the basics of how microphones work, the different types – carbon, dynamic, ribbon, condensor/electret, and how the omnidirectional pattern works. Also, the internal construction of a high end measurement microphone. …
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Why do digital oscilloscopes appear noisier than traditional analog oscilloscopes? Dave busts the myth that digital scopes are noiser than analog scopes, and demonstrates what inherent advantages digital scopes can have over analog scopes in terms of true waveform capture. And also why your analog scope may be hiding important …
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The most often requested video! Dave explains what Operational Amplifiers (OpAmps) are and how they work. The concepts of negative feedback, open loop gain, virtual grounds and opamp action. The comparator, the buffer, the inverting and non-inverting amplifiers, the differential amplifier, and the integrator circuit configurations are also explained. Then …
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The EEVblog is 5 years old today! Just a quick thanks to everyone who has supported me and the blog. Podcast: Download
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What’s inside a professional Sony MDE7000 Video Effects Processor, as used in TV stations and video production facilities? This one was used in the Foxtel TV1 TV station before it was shut down end of 2013. Dave also discusses high density PCB design issues and methods, and systems engineering. Spec …
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Fluke 114/117 Kit Multimeter for hackers, makers, and hobbyists. Tweet @FlukeCorp if you want to get on the list for one: Use the hashtag #FlukeKit Or ask on their Facebook page Dave comments on the Sparkfun/Fluke multimeter customs trademark/trade dress fiasco, and shows off the new low cost Fluke 114/117 …
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Dave takes a look at the world’s cheapest temperature controlled soldering station, the $16 Hakko 936 knockoff Yihua 936 from Hobby King. How does it compare to the older genuine Hakko 926? Also, thermal capacity comparison testing is done on those two irons plus the high thermal capacity JBC. Sagan …
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Teardown Tuesday What’s inside the world shittiest camcorder that costs a whopping $7.50 on Amazon? The Global New Beginnings DV-136ZB 1.5″ 3.1 MP Digital Video Camera Mailbag: https://www.youtube.com/watch?v=NYWGXLuyH4M Forum HERE Podcast: Download
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Fundamentals Friday Dave explains what the ripple and noise specifications on a power supply is and how to measure it using different methods on both analog and digital oscilloscopes. From bad techniques through to good, showing the effect of each one. Traps for young players aplenty in this one. How …
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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 Part 2 Part 3 Forum HERE Podcast: Download
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