In this project we design low cost high performance programmable home security system using few LDR’s as an input sensors. When above sensor(s) get triggered system may dial the user specified phone number (using build-in DTMF generator) and activate the high power audio alarm and...

Single Channel Relay Board is a simple and convenient way to interface a relay for switching application in your project. Specifications     Input supply 12VDC @ 42 mA     On Board 5V Regulator provides 5V output     Output SPDT Relay     Relay specification 5 A...

Ken Boak has been working on an open source micro-solar inverter project: We wanted to make a design that uses readily obtainable N-type FETS and an Arduino (more strictly a ATmega328P-PU on a breadboard) to generate the PWM signals and provide simple circuit protection, and load...

Markus Gritsch shared his LiFePO4 charger project in the forum: Since I really like using LiFePO4 AA and AAA batteries in some of my projects, I finally gave in and built a dedicated charger for them. Previously I used a lab power supply to mimic the constant current/constant...

  The LTC4282 is an energy monitoring Hot Swap controller with dual MOSFET drive to enable 100A and higher current board designs. The LTC4282 ensures safe board insertion and removal from live 2.9V to 33V backplanes by controlling external N­channel MOSFETs to gently power up...

Jim Colby @ edn-europe.com discuss how to protect your circuits on automotive enviroment: Along with the ever increasing drive for improved gas mileage, automobile manufacturers are striving to make their vehicles safer with each new design iteration. The safety features that are now...

by eliesalame @ instructables.com: In this project I will show you how make two Arduinos talk to each other using RF frequency (wireless). Now I will use the knowledge in all these project and improve on them by making one Arduino send data to another Arduino wirelessly using an...

Georgia Institute of Technology managed to cool FPGA trasistors using water, they announced: Using microfluidic passages cut directly into the backsides of production field-programmable gate array (FPGA) devices, Georgia Institute of Technology researchers are putting liquid cooling...