Audio and Video

Dirt cheap frame grabber

This is a story of a a video digitizing circuit I built early 1990′s. It kind of worked, but was not practical then and much less useful nowadays. It is an interesting how simple circuit could be used for converting analogue composite video signal to digital for computer processing. This is the story of Dirt

USB cameras connected to Android 10 device do not work

I used to use some external cameras like microscope and endoscope connected to my Android phone with OTG cable. Google Android documentation says that many standard USB cameras should generally work with Android: The Android platform supports the use of plug-and-play USB cameras (that is, webcams) using the standard Android Camera2 API and the camera

Audio cable testing articles

Here are two articles that could be interesting and entertaining to read. In this first article the writer uses audio analyzing tools to to debunk spurious claims made by audiophiles, HiFi journalists, and the high-end audio industry about the quality of their products. This article covers using audio analyzers and also using SDR software to

Signal processing tips from Hackaday

Signal processing is an electrical engineering subfield that focuses on analysing, modifying and synthesizing signals such as sound, images and biological measurements. Electronic signal processing was first revolutionized by the MOSFET and then single-chip digital signal processor (DSP). Digital signal processing is the processing of digitized discrete-time sampled signals. Processing is done by general-purpose computers

Smartglasses shoot lasers directly into the retina

Cyberpunk 2020! Omg lasers directly into the retina! Lol! Whew. I think I’ll skip this one, but it is super rad. Check out this article: Bosch Gets Smartglasses Right With Tiny Eyeball Lasers A tiny laser array paints images directly onto your retina “Lightweight and slim, with a completely transparent display that’s brightly visible

CES 2020

CES (Consumer Electronics Show) is the world’s gathering place in January at Las Vegas for all those who thrive on the business of consumer technologies. This event owned and produced by the Consumer Technology Association (CTA)® has served for 50 years to introduce next-generation innovations to the global marketplace. Here are some interesting news I

Audio test videos

Here are some videos related to audio systems testing for use and your enjoyment: Left and Right Stereo Sound Test 20Hz to 20kHz (Human Audio Spectrum) 0Hz – 22kHz – Animation Reacting to Sound Frequencies How Old Are Your Ears? (Hearing Test) Bass Test 2-150Hz Frequency Sweep 1-100hz (Bass Test) 1080p HD Ultra Deep Bass