In this instructable, we will be building a laser guided tripwire alarm system using a SainSmart Leonardo R3 development board. Arduino - Laser Tripwire Alarm System -...

SubPos Positioning System - A "dataless" Wi-Fi positioning system that can be used anywhere GPS can't. SubPos is an indoor positioning system that can be used in various environments such as metro lines, shopping malls, carparks, art galleries or even conference centers; essentially...

Tiny Bar-Graph displays provide a Red color bright, easy to read display of Voltage range of 0 to 5V. This Bar-Graph has 20 segments in single color and display 0 to 5V DC. The Barograph Voltage monitor is based on PIC microcontroller with 10 Bit resolution ADC. This high performance...

Celebrating its 45th anniversary, adafruit stumbled upon these high-resolution images of Intel’s 1971-released 4004 CPU. Click any of the below images to view them at their maximum scale on the MIT domain: Schematic, Mask, and Die Shot of Intel’s 4004 CPU from 1971 -...

TheSuperSewcio @ instructables.com shows us how to control a servo motor in high precision using Arduino: In many project like CNC machines people use stepper motors. They are probably always more expensive than servos. They can rotate 360°, 1 step = 1,8° (mostly). Servos can...

In this project, you’re going to build a web server with an ESP8266 to remotely control an RGB LED. This project is called ESP8266 RGB Color Picker. ESP8266 RGB Color Picker -...

ESP8266 low power consumption revisited: Using Wi-Fi is a convenient way to link your newly created IoT device into your existing IT infrastructure – including cloud services – but it also has a drawback. Wi-Fi’s demand for power usually makes battery operation impractical...

Mini (1.44'' x 0.94'' or 24mm x 37mm) 8X16 RGB LED Array. 128 RGB LEDs with three LED chip each gives 384. For this project I designed two PCBs. A control PCB and a LED PCB. My goal was to fit them both in a small panel inside a 5x5 cm square to use cheap Chinese Manufacturing...