Main Content

Arduino Wireless Alarm System Using Existing Sensors

“This project can be built in about half an hour at a cost of about $20.00 if you have existing 433Mhz or 315Mhz wireless alarm sensors. It can also be a complete new project with wireless alarm sensors, such …

Astronomers Detect Biggest Explosion In The History Of The Universe

“Scientists studying a distant galaxy cluster have discovered the biggest explosion seen in the Universe since the Big Bang. The blast came from a supermassive black hole at the centre of a galaxy hundreds of millions of light-years away. It …

Bendable, safe, long-lasting and green cement-free concrete developed at Swinburne

“A new type of concrete that is made out of waste materials and can bend under load has been developed and patented by Swinburne researchers Dr Behzad Nematollahi and Professor Jay Sanjayan. This material incorporates industrial waste products such as …

Blue Light Project Part2

“So in Blue Light Project Part1 I explained some of the steps I took to reduce insomnia by reducing evening blue light. I didn’t have an easy way of seeing how well it worked, so I decided to build …

Breathalyzer Medallion

“We all have a special friend who needs supervision on a night out. Mine is called Geoffrey, and on his stag weekend it seemed prudent to have an outward display of how much of a liability he was likely to …

Building a Raspberry PI Stratum 1 NTP Server

“After the nice reception my last article on NTP got, I decided that it was about time I pulled a project off the shelf from a few years ago and get a stratum 1 NTP server running on a Raspberry …

Cassette Pi IoT Scroller

“The Cassette Pi is a self-contained real-time notification scroller, all housed neatly inside a transparent cassette tape. A Raspberry Pi Zero is sandwiched between the two tape reels, retrieving all manner of Internet of Things notifications from the fabulous IFTTT …

Cherry Pi Split Mechanical Keyboard

“I’ve used a Microsoft Natural Elite keyboard for years. And after almost 20 years of loyal service, it’s at the end of its lifespan. During my search for a replacement, I also looked at different mechanical keyboards. And …

CircuitPython 5.0.0 released

“This is CircuitPython 5.0.0, the latest major revision of CircuitPython, and is a new stable release. 5.0.0 features many improvements and enhancements to displayio, including grayscale OLED and e-paper displays, extensive additions and improvements to BLE …

Project  CMOS Clock

CMOS Clock

“Introduction I’ve recently become interested in clock projects, and it seemed appropriate to start by building the essential digital clock assembled from logic chips. Although clock projects exactly like this have been around for the best part of 50 …