Dejan Nedelkovski had built an Arduino security and alarm system project that uses an ultrasonic sensor for detecting objects and a buzzer for notification. Components needed to build this simple system are: Arduino board, LCD display, 4x4 keypad, ultrasonic sensor and buzzer. The...

The A1230 is a dual-channel, bipolar switch with two Hall-effect sensing elements, each providing a separate digital output for speed and direction signal processing capability. The Hall elements are photo lithographically aligned to better than 1 µm. maintaining accurate mechanical...

pinko @ blog.exrockets.com has build a mini GPS data logger based on PIC18F25J11 microcontroller. Based on my first GPS data logger  I made a new version which is even smaller than the initial design and should be able to fit in any rocket, RC model etc. The new GPS data logger uses...

A Homeschoolers Workbench @ instructables.com has build an Arduino based datalogger that reads data from a DHT22 sensor and logs them on a SD card. In this instructable I am going to show you how to build a weather station that logs the information that it collects on a sd card. DIY...

  ICStripBoard is a innovative cheap tool to enable rapid prototyping of surface mount integrated circuits (IC’s) and allow their usage in prototype electronics projects. Inline surface mount IC’s come in a Variety of packages which are different sizes and these Printed...

@ blog.tindie.com This quad band GSM board is claimed to be the worlds smallest of its kind. We have no way to verify this bold claim but let’s all agree that this is a pretty small board that lets you send texts and make calls. The GSM feature is an addition to the OLEDiUNO Cube...

Researchers have demonstrated the high-performance potential of an experimental transistor made of a semiconductor called beta gallium oxide, which could bring new ultra-efficient switches for applications such as the power grid, military ships and aircraft. The semiconductor is...

"pinko" build a laser trigger for chronograph using PIC18F2550 and LM393 comparators. He writes: I finished this laser wall trigger for my HIGH RESOLUTION AND ACCURACY CHRONOGRAPH. The purpose of this device is to generate the trigger start and stop impulses for my chronograph as...