by christian.ich.7 @ instructables.com: The Target of this Project was to learn how to use different functions of the atmega: • Connecting two Atmegas with a wireless connection • Each Atmega has a Thermometer (DS1621) to read the actual temperature • Use the sleep Mode...

by benhur.goncalves @ instructables.com: Hey folks! After making an Arduino smartwatch just last week, I received many complaints,or tips, to use a RTC (real-time clock) module. That's because the Arduino timer is not very precise, it can lose a couple a minutes along a full work...

by Michael Dunn @ edn.com: It was a few years ago that I first heard of a free site where you could draw and simulate designs. "What's the point?" I thought. But, the idea is taking off. Was I wrong? I questioned the usefulness of this cloud concept because there had already long...

by Martin Cooke @ elektormagazine.com: A novel design of supercapacitor using a hybrid silica sol-gel material and self-assembled monolayers of a common fatty acid has been developed by researchers working at the Georgia Institute of Technology. The device is said to provide an...

In this episode Shahriar examines a faulty R&S FSH3 100kHz – 3.0GHz Portable Spectrum Analyzer. This exceptionally dirty unit does not power on and is missing a power supply and battery. After verifying the correct operation of the battery charger circuit and keypad the problem...

Come on a ride as Dave repairs an intermittent Keithley 177 Microvolt DMM, garden paths and all. EEVblog #777 - Keithley 177 Microvolt DMM Repair -...

This video illustrates how RF (radio frequency) standing waves are created in transmission lines - through the addition of the forward (transmitted) wave and the reflected wave that results from improperly terminating the line or matching the load or antenna to the transmission line...

This is a no frills DIY Analyzer intended for frequencies ranging from 1.6 to 30 Mhz. This simple Antenna Analyzer could be a nice project for anyone just getting started in setting up a station on the HF bands. Arduino DDS AD9850 Antenna Analyzer -...