RGB LCD Display Electromyography using Arduino + MyoWare Muscle Sensor

Measuring muscle activity that uses electric potential as an indication to know the health, and diagnose muscles to its present status is referred to as electromyography (EMG). Electromyography also assesses the condition of nerve cell (also called as motor neurons) that controls the muscles and can detect neuromuscular disorders. The reference design is a LCD display electromyography using arduino plus myoware muscle sensor from Adafruit. The reference design features the standard LCD 181 also from Adafruit Industries LLC with the use of I2C/SPI character LCD backpack. The design also uses the muscle sensor surface EMG electrodes. Read more

Electronic LED Candle

This reference design is a simple electronic LED candle that is well suited for birthday occasion. It acts like a real candle, which constantly flickers and changes its light intensity depending on the airflow. It has 9 LEDs, which blinks at random period and phase that can also be blown by the user as if it is a real candle. It specially uses the C&K’s PTS830GM140 tactile switch, a micro-miniature switch with low profile and high actuation forces designed for wearable electronics. It features extremely low start-up voltage and high output voltage accuracy. Read more

ATmega328P-PU + VS1053 Based MP3 Player

The MPEG-1 or MPEG-2 Audio Layer III (MP3) is an audio coding format used to shrink the size of a large audio file into a smaller one (about 8.33% of the original file size), without affecting its sound quality. It is the most popular audio format downloaded and played on most digital audio players. Digital audio players basically use a digital signal processor (DSP) and a digital-to-analog converter (DAC) to play an MP3 file. The DSP processes the MP3 data and sends it to the DAC to convert it into an analog signal that can be heard if inserted into an audio amplifier with a loudspeaker. Read more

Ultrasonic Rangefinder Using Arduino Uno and PmodMAXSONAR

The rangefinder is a device that measures distance from the observer to a target being measured. The device uses a sensor as the method of gathering measurements of distance, such as ultrasonic, laser, and radar. The circuit is a DIY rangefinder using a PmodMAXSONAR ultrasonic sensor, an Arduino UNO, and a 16x2 LCD module. The ultrasonic sensor has an effective detection range of 6in - 255in. It can detect objects within 1in up to 20ft away. The PmodMAXSONAR can send range data in three methods: UART, analog and PWM. Read more