When developing a new circuit design you will find that you often drop in solutions from previous projects since there’s no reason to re-invent the wheel every time. HackEDA takes this idea and pushes it out to the web, it’s in beta right now so it might not be able to handle all of your project ideas but by clicking a few buttons you can build the basic framework
 This Digital Reversi Board Project by Hanting Lu and Kai Wang from Cornell University look like fun. It is just like the real reversi game and ensures that players can’t make invalid moves. An Atmel Mega 1284 is used to read in the press locations from the touch sensor and is also interfaced to the bi-color LEDs using a TI 3 to 8 line decoder chip and a
In years past I remember looking out the window as soon as I woke up to see what the weather is like, sad to say these days I usually glance at a smart phone on my bed side table. This way I not only get the current conditions but also the high and low temperature for the day and the precipitation prediction. This project is is doing a similar
If you have a Raspberry Pi you can use your existing LEGO MINDSTORMS Sensors. Thanks to John Cole from Dexter Industries for sharing this with us. “This is also a great example of how to get started with I2C on the Raspberry Pi. We chose the dIMU because it’s easy to access and use, with just four lines to connect (SDA, SCL, GND, and VCC).  You may have to
   Using Muriatic Acid (found at your local hardware store) and Hydrogen Peroxide (found at your local drug store) Felix Rusu from LowPowerLab was able to make a DIY SMD Metal Stencil using a Pop Can. He cut out a section of the aluminum can wall and transferred the SMD pad image to the metal using the toner transfer method. Touching up some of the imperfect areas of the
Bogdan Raducanu from Electro Bob was curious how quickly LED strips reduce in intensity. Just like watching someone grow, LEDs dim over time very slowly. You can see how he built his LED Logger version 1 and the new version 2. “Its PCB is developed from that of the ego box, replacing the 7 segment drivers with 8 channel high power drivers. Everything is based on tuxgraphics.org web client
Thanks to Alexandre for sending in his latest project, it is a DIY Quadcopter that is powered by an Arduino Pro Mini Module. He took out the original control electronics and did a brain transplant with a Arduino Pro Mini Module and a ton of sensors. Looks like it can fly very nicely, his next goal is to upgrade the microcontroller to an ARM7 stm32F103 (PDF) for more computing
