Posted on April 12th, 2014 11 comments
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.
Discuss on the Forum HERE
Posted on April 10th, 2014 11 comments
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 signal detail from you.
Demonstrations of how memory depth, analog bandwidth, averaging, and intensity graded displays can all effect the signal detail you see on your digital oscilloscope.
And how long exposure camera shots on analog oscilloscopes can reveal detail you can’t see with your eyes.
Posted on April 6th, 2014 33 comments
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 a practical breadboard circuit to demonstrate a virtual ground and the effect of voltage rail limitations.
All EEVblog Opamp related videos are HERE
Posted on April 4th, 2014 38 comments
The EEVblog is 5 years old today!
Just a quick thanks to everyone who has supported me and the blog.
Posted on April 3rd, 2014 4 comments
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 Sheet: http://www.pmotions.com/Public/PDFs/SONY/DME-7000.pdf
User Manual: http://support.sapir.ac.il/files/2012/05/dme3k7kp.pdf
High Res teardown photos: