ePanorama.net

All about electronics and circuit design

Friday Fun: Ig Nobels

Ig Nobel spoof prizes are not as famous as the “real” Nobels – not quite. All the fun occurred online instead of traditional cerenomy. BBC reports: Upside-down rhino research wins Ig Nobel Prize https://www.bbc.com/news/science-environment-58507100 An experiment that hung rhinoceroses upside down to see what effect it had on the animals has been awarded one of

SDI, HD-SDI, 3G-SDI, 6G-SDI and 12G-SDI

SDI is a one-way, multiplexed protocol designed to carry the highest quality video, audio and metadata over a coaxial cable or fiber. SDI is a professional video signal that is preferred in production environments because of its longer range (up to 300 feet) and reliability. If you’re in an environment in which your cable could

Karhu Active Pulse teardown

Karhu Active Pulse (W311) was a fitness tracker product that was sold cheaply few years ago. It was quite comfortable on the wrist the UFit application running on Android was just fine (not very good or bad). Most functions go on by pressing that white circle (pulse, sleep monitoring) for about three seconds. You can

HKL Bluetooth beacons and API

I have wondered what the mysterious candy-box-like boxes that have appeared on bus stop signs in Helsinki Finland. HSL has installed at a total of about 1700 of this kind of boxes to bus and tram stops, as well as on buses and trams. They are also coming to metro stations. These small boxed are

XLR Mic cable tester with one LED

Here is my newest build: Microphone wiring tester. This tester will turn on LED when microphone wiring is OK and phantom power is turned on. If there is any common problem, LED will stay off. This circuit will detect ground connected to wrong pin, broken wires that make no contact and short circuit between wires.

Lutron LCR-9063

I bought a Lutron LCR-9063 meter long time ago (expect around 20 years or more) to be able to measure value of coils and capacitors. I has worked well for me. What looks like the same meter are sold as VOLTCRAFT LCR-9063 Component tester. This meter is designed for measuring resistance, inductance and capacitance. LCR-9063

30 years of Linux

August 25th, 1991 That’s right, it’s been 30 years since 21-year-old Finnish student Linus Benedict Torvalds made his now-famous announcement on the day of August 25th, 1991, on the comp.os.minix news group, saying that he is working on a free operating system for 386(486) AT clones as a “hobby.” https://9to5linux.com/happy-30th-birthday-linux