Bob tipped us about a simple oscillator that uses negative resistance: Normally -according to the Ohm's law- when the applied voltage is increasing, the current is increasing too, however some components can break this law. When the voltage increases, current decreases. This is...

Mobile Roaming allows you to stay connected wherever you are and receive calls and SMSs, but with very expensive cost. So if you don’t have enough budget, you will lose your incoming calls till you are back from a travel. A team of innovators from Egypt had developed a new device...

The Pixel is an Arduino-compatible smart display, combining a 32-bit Cortex M0+ MCU with 32K of RAM, a 1.5" 128x128 color OLED screen, and a microSD slot all in one package. This is Rabid Prototypes’ second iteration of Pixel, which originally raised nearly $10,000 on Kickstarter...

In this video Circuit Basics show us how to use I2C to connect an LCD to the Raspberry Pi. After showing you how to connect the LCD to the Pi with a PCF8574 (http://www.circuitbasics.com/pj6v), they show you how to program it. First I'll cover the basic stuff like printing text to the...

In this technical tutorial Kolban Technical Tutorials start to look a Pulse Width Modulation with the ESP32 for dimming LEDs and for controlling a servo. ESP32 and Pulse Width Modulation -...

Susan Nordyk @ edn.com writes: Small enough for wearable devices, STMicroelectronics’ LIS2DW12 three-axis accelerometer draws only 50 nA in standby mode and 380 nA in low-power mode at a 1.6-Hz output data rate, adding negligible load on the battery. Operating from a supply voltage...

by Graham Prophet @ edn-europe.com: Allegro MicroSystems has added two 0˚ to 360˚ angle sensor ICs that provide contactless high-resolution angular position information based on magnetic Circular Vertical Hall (CVH) technology. Allegro has incorporated advanced diagnostics to...

Simple 3 Phase Arduino energy meter from The DIY Life: Again, with this meter I was going for simplicity. Sure, for perfectly accurate measurements you need to measure both the supply current and voltage but for this application and in the interests of keeping the energy meter simple...