In this tutorial, I will demonstrate how to create a mosquito repellent device with the help of an Arduino. The repellent comes in a shield form that can be connected to the Arduino board, allowing for easy modification of its frequency. This project is perfect for camping and hiking outdoor activities, as it emits a […]
Arduino Mosquito Repeller Read More »
One of us (Mailland) grew up in Paris in the 1980s, surrounded by advertisements for racy “pink” chat rooms, accessible through terminals connected to France’s Minitel network. They were a lucrative part of the wider Minitel economy, which also let you send messages, check bank balances, and read news. By 2000, as the Internet displaced
From Trash to Treasure: How to Resurrect a Minitel Terminal Read More »
Pulse sensors have become popular due to their use in health-monitors like the Fitbit. The sensors used are cheap, simple and pretty reliable at getting a reasonable indication of heart rate in daily use. They work by sensing the change in light absorption or reflection by blood as it pulses through your arteries — a technique
Heart-rate monitor on a small OLED display with MicroPython Read More »
Bottom line: Repurposing obsolete hardware is a popular pastime among the tech community, and the latest project from the YouTube channel Artillect is a fine example of what’s possible when thinking outside of the box. Is it practical? No, not really. Is it neat? Absolutely. Riley took a Brother AX-25 electronic typewriter from the late 1980s that utilizes
Rohde & Schwarz released the R&S NGP800 family of power supplies, which include two and four channel models. Channels can be operated fully independently or synchronized, and features include a 5” high-resolution touch screen, which also displays detailed statistics. The devices offer voltages up to 250V, currents up to 80A, and power up to 800W. Each channel
R&S NGP800 POWER SUPPLIES OFFER UP TO FOUR INDEPENDENT CHANNELS IN A SINGLE INSTRUMENT Read More »
SparkFun has announced another experimental SparkX board design, which enables higher motor control on a Qwiic-compatible I2C bus, with support for a built-in emergency stop button, and the capability to drive motors requiring up to 2A. The Qwiic Step is the latest of SparkFun’s entry in the SparkX board family, which are ranges of experimental designs marketed as fully-operational devices, but without guaranteeing them being
SPARKFUN LAUNCHES SPARKX QWIIC COMPATIBLE BOARD TO ENABLE STEPPER MOTOR CONTROL Read More »
An oscilloscope can be an expensive piece of equipment, but not every measurement needs four channels and gigahertz sampling rates. For plenty of home labs, old oscilloscopes with CRTs can be found on the used marketplace for a song that are still more than capable of getting the job done, but even these can be
ESP32 OSCILLOSCOPE SKIPS SCREEN FOR THE BROWSER Read More »
Adafruit’s PropMaker Feather is a microcontroller board designed specifically for building props with electronic features. Thus, what better way to show it off than by building a nifty replica of the most menacing AI ever to roam this solar system? That’s right, it’s the Adafruit HAL9000 build! Following the 80/20 rule, this version is intended to
BUILD AN EASY REPLICA OF HAL 9000 Read More »
In retrocomputing circles, it’s often the case that the weirder and rarer the machine, the more likely it is to attract attention. And machines don’t get much weirder than the DEC Rainbow 100-B, sporting as it does both Z80 and 8088 microprocessors and usable as either a VT100 terminal or as a PC with either
CLOCK HACK GIVES DEC RAINBOW A NEW LEASE ON LIFE Read More »
So here is how i made my foot pedal used to start Linux terminal using an Arduino. It’s made because I am board of pressing the terminal icon with my mouse. P.S. Sorry for my English. I am from Croatia. Tools needed: -Soldering iron and some solder -Wire clippers or any other cutting tool -Screwdriver
Use foot switch to open Linux terminal using an Arduino Read More »
