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15C, 16c or 41c take your pick, Build you’re own Classic HP Calculator Emulator

“I have used HP RPN calculators all my life. I wonder why there aren’t any RPN calculators anymore. They have been phased out in favor of the standard infix calculators. Anyway, I’ve always wanted an HP15c calculator and …

2.5A Bipolar Stepper Driver with Micro-Stepping, Current and Decay Control – Arduino Compatible

“This is an Arduino compatible board that contains an Atmega328 microcontroller and Bipolar Stepper Motor Driver chip STK682-010. This Hybrid IC from ON Semiconductor can deliver up to 2.5A current and it can have an input supply up …

Arduino 2-Digit 0.5″ Common Cathode 7 Segment Display Module

“This is an Arduino compatible board for creating 2 Digit Display projects. The circuit operates with 5V DC, Connector CN1 is provided for bootloader programming and Arduino firmware upload. A new Atmega328 chip requires a bootloader and Arduino firmware programming …

Arduino Robot Plays Music on Wine Glasses

“Hello everyone, today I will tell you about how I assembled an arduino robot that plays music on wine glasses. And so, let’s take everything in order. To implement the project, I will need: wine glasses, a stepper motor …

Astra Reaches Orbit

“Astra Space, Inc., successfully completed its first commercial orbital launch for the United States Space Force late Friday night, November 19, 2021, PST. The launch, STP-27AD2, was conducted from Astra’s Kodiak Spaceport, located at the Pacific Spaceport Complex …

BASIC Interpreter for the Raspberry Pi Pico

“The PicoMite is a Raspberry Pi Pico running the free MMBasic interpreter. MMBasic is a Microsoft BASIC compatible implementation of the BASIC language with floating point, integer and string variables, arrays, long variable names, a built in program editor and …

Big Batteries on Wheels Can Deliver Zero-Emissions Rail While Securing the Grid

“Berkeley Lab study shows how battery-electric trains can deliver environmental justice, cost-savings, and resilience to the U.S. Trains have been on the sidelines of electrification efforts for a long time in the U.S. because they account for only …

Birds of prey wear 3D-printed shoes to treat foot disease

“3D printing technology now has a new addition to its list of useful applications – producing protective shoes for birds. In a first for Asia, Jurong Bird Park’s avian veterinary team and the Keio-NUS CUTE Center at the National …

Building a Portable Bluetooth Spinning Record Player

“Hello fellow makers, In this Instructable I would like to show you a prototype for a portable record player that I’m busy designing. The idea is to have a small easily transportable record player where the record remains stationary …

Developing high-performance MXene electrodes for next-generation powerful battery

“Two-dimensional MXene has been a rising star in the energy world as this material can store energy fast. But their unstable voltage output limits their applications. A collaborative research team led by scientists from City University of Hong Kong (CityU …