Spectrum analyzers provide a visual aid to circuit design and signal processing critical to troubleshooting and understanding how frequencies both affect and are affected by electronics. While the educational and practical applications of such devices are extensive, the availability of such devices are often limited by cost and usability. Similarly, low cost designs often suffer from lack of range or resolution. Our design overcomes cost and limited usage by implementing a hybrid superheterodyning and fast fourier technique. The superheterodyning aspect grants the device a robust range while the fast fourier and digital calculations allow for imperfections in devices to have lower impact on the signal integrity. Additionally, cost and availability were made more attractive by using the Raspberry Pi, a widely available and low cost computer, as the central controller of the system.
HDMI 7″ 800×480 Display Backpack – With Touchscreen: Its a mini panel-mountable HDMI monitor with a built-in touchscreen! So small and simple, you can use this display with any computer that has HDMI output, and the shape makes it easy to attach to a case or rail. This backpack features the TFP401 for decoding video, and includes the attached display so its plug-n-play. (read more)
Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!
Eink, E-paper, Think Ink – Collin shares six segments pondering the unusual low-power display technology that somehow still seems a bit sci-fi – http://adafruit.com/thinkink
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.