This Arduino-based standalone MP3 player was designed by Jose Daniel Herrera using the VS1002d single-chip MP3 audio decoder, which is a complete audio solution with a high-performance, low-power DSP processor along with working data memory, instruction and data RAM for user applications, serial control and input data interfaces, 4 general purpose I/O pins, an UART, as well as a high-quality variable-sample-rate mono ADC and stereo DAC, followed by an earphone amplifier and a ground buffer. His project uses a SD card module for storing MP3 files and a 4×20 character LCD for providing an user interface for displaying song menu and other information.
Arduino MP3 player
One of the most interesting applications of 3-D printing technology is building customized robot parts. It allows makers to design their own parts on a computer using affordable tools and convert the design into an actual physical product in just a few hours. Randy’s 3-D printed walking robot is a great example of 3-D printing robot parts for rapid prototyping and implementation of your ideas. The robot uses two standard servos for locomotion and are controlled by Arduino. The author also shares his 3-D printer design files and Arduino sketch to the public.
3-D printed robot
People with impaired hearing and speech often find difficult to interact with other people, mostly because their sign language is not understood by all. This Arduino-based gesture vocalizer is designed to assist those people to communicate with normal people. The device is built as a wearable glove, which converts the hand gestures into human recognizable audio. Two flex sensors for detecting bending of fingers and one ADXL335 3-axis accelerometer for getting the orientation of hand are embedded on the glove for gesture recognition. For audio conversion, the APR33A3 audio processor chip is used to storing and playing audio messages. An LCD display is also included in the project for the visual display of the message.
Zero Plus is a new open-source wifi module for Internet of Things applications. This project is currently being crowdfunded on Indiegogo. With RT5350 wifi SoC on board, Zero Plus provides a high performance 360 MHz CPU for advanced applications such as Wi-Fi data processing, etc. In addition, the RT5350 offers a variety of hardware interfaces (SPI/I2S/I2C/PCM/UART/USB) to support a range of possible applications.
Zero Plus IoT development platform
Texas Instrument’s medical development kit (MDK) is based on the C5515 DSP and consists of individual analog front-end boards forvECG, digital stethoscope, and pulse oximeter. This application note describes the implementation of digital stethoscope using the front-end board of MDK and sensor to capture the acoustic sound waves of the heart and lungs. The board contains the necessary circuitry for signal conditioning and acquiring signals from the sensors.
Stethoscope implementation on MDK board