The ESP8266 Serial WIFI Wireless Transceiver Module is popular (we have  been giving them away in some contests). It packs a lot of features in a small package for a great price. Make spoke with the creators of the Arduino Support for that device. Since there is a powerful microcontroller running the device they were able to pack in some additional code to get some work done on the side. “Make: Did
Alex Glover created a locked box project, some project boxes need a secret knock code to unlock, GPS positions to unlock and dice roll combinations to unlock. I think this is the first time I have seen a box that is unlocked by a flame. Nice thing is that it is not obvious that the box is opened in this way. I think it would be nice to have
If you would like to keep better track of your energy usage this GSM Power Monitor and Control by Idris Zainal Abidin might be just what you need. There isn’t much details so you would not be able to build it from the article but it should be enough for some inspiration to build your own creation.  The modular build looks great even though it would not be best suited for a
 Check out the Cliff Test, it is a Constant Current Variable Load by TimNJ. It is based on the popular inexpensive load tester circuit that Dave Jones built a while ago. “Here’s some information about it: -External AC/DC power suppply -Fan cooled (no temperature control at the moment) -Load switch (with LED indicator) -10-turn pot -Internal trimmer to set max current (currently set at 1A, but can most likely
Kerry Wong has built a great Laser Oscilloscope using two Speakers. Of course this is not something that can be used to measure any real voltages or waveforms with any accuracy, for that you can use any used $50 scope. What this one does is produce a great visual display. You would be able to record separate right and left audio tracks to produce any light show you like.
If you are interested in making a very basic scope to monitor some simple things before you spend the money on a real scope have a look at the work that vaupell posted in the Element 14 community. He tried a number of internet scope projects until he found this one that worked like a charm. “After trying many different versions of code and tutorials, I was unable to
RFID technology has rapidly been getting cheaper and simpler for the DIY enthusiast to get into over the years. The video above uses a Raspberry Pi and doesn’t have build instructions but that doesn’t matter much. Any microcontroller can easily connect to the heart of the access system which is the actual RFID reader. An Arduino could be used instead, it could be made stand alone instead of network connected
