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All about electronics and circuit design

Quantum Garden display

I saw this morning an interesting quantum demostration display at Aalto University campus in Espoo Finland. There are springs you are allowed to touch to control this display. Here is closeup of description on the display More details on the project page http://quantum.garden/ It looks like the large number of LEDs in this display could

The next version of HTTP won’t be using TCP | Ars Technica

https://arstechnica.com/gadgets/2018/11/the-next-version-of-http-wont-be-using-tcp/ HTTP is switching to a protocol layered on top of UDP. Today’s HTTP (versions 1.0, 1.1, and 2) are all layered on top of TCP (Transmission Control Protocol). TCP isn’t particularly tuned for the kinds of scenarios that HTTP is used for. TCP requires a number of round trips between client and server to

Christmas lights technology

Christmas lights can be a beautiful sight to behold. Stringing lights around your home can be a real safety hazard if you’re not careful. For outdoors use the lights you need to have lights that are designed to be used outdoors. The lights made for outdoors used can withstand the outdoors conditions – meaning possibly

USB to RJ45 adapter teardown

Here is tear-down of cheap USB 2.0 to CAT5E CAT6E RJ45 LAN Modem Extension Extender Adaptor for Webcam XBOX adapter. This adaptor is designed to allow your USB cameras, printers, webcams, keyboard, or any other USB device to be situated some longer than normal USB cable (few meters) distance away from PC. This converts USB

USB sound card repair

I ordered this cheap (around $10-15) 5.1 channel USB sound card from China few years ago. The device does not have markings on the box so hard to day which exact model it it was. It seems that there are several similar looking cards available at dx.com and banggood.com even today. CM6206-LX based USB Sound

Why Sleep Apnea Patients Rely on a CPAP Machine Hacker

https://motherboard.vice.com/en_us/article/xwjd4w/im-possibly-alive-because-it-exists-why-sleep-apnea-patients-rely-on-a-cpap-machine-hacker?utm_campaign=sharebutton An Australian hacker has spent thousands of hours hacking the DRM that medical device manufacturers put on CPAP machines to create a free tool that lets patients modify their treatment.

Definition of kilogram set to change – BBC News

https://www.bbc.com/news/science-environment-46143399 Soon kilogram might not be exactly what it used to be. Scientists plan to change the way the kilogram is defined. Currently, it is defined by the weight of an aging platinum-based ingot called “Le Grand K” located in Paris. Many scientists favour of defining a kilogram in terms of an electric current, but

New product: Raspberry Pi 3 Model A+ on sale now at $25 – Raspberry Pi

https://www.raspberrypi.org/blog/new-product-raspberry-pi-3-model-a/ With the new Raspberry Pi 3 Model A+ you can now get the 1.4GHz clock speed, 5GHz wireless networking and improved thermals of Raspberry Pi 3B+ in a smaller form factor. By halving the RAM to 256MB, and removing the USB hub and Ethernet controller, the board could be made cheaper and smaller. For