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

FLORA as Wearable Pedometer

One of the devices used to monitor the progress of an exercise is the pedometer. This device is used to measure steps taken by an individual and determine the speed, distance and even calories burned to motivate them in getting fit. Present designs available in the market today uses accelerometer compared to the mechanical devices used in the early designs. This design uses the Flora v2 platform from Adafruit as the host controller for the system. It is built around the Atmega32u4 chip, which has built-in USB support. Read more

16-button Inductive Keypad Using a16-Bit Ultra-Low-Power Microcontroller

Most systems of keypad are prone to breaking due to the moving parts and dependence on electrical contact. This system uses a 16-button inductive keypad using a 16-bit MCU. The Inductive sensing is capable of handling rugged and wet environment. It is also has low cost maintenance compared to other system in rugged and wet environment, and scalable keyboard. The system consist of a keypad assembly, MCU, two 4:1 analog multiplexers, and an inductive to digital converter. The system is supplied by a 5V USB power. A low dropout linear regulator is used to step down the 5V USB power to the 3.3V required by the LDC1314 inductive to digital converter and MSP430 MCU.

Miniaturized Pulse Oximeter

Electronic equipments for medical purposes plays a big role in saving lives everyday. It needs to be accurate in data and precise in each reading. In this reference design is a miniaturized pulse oximeter, a device that measures the changes in oxygen level in the human blood through light reflection. Read more

Wireless Relay Control using IC2262/2272 and ATmega328PB

The IC2262/2272 transmitter is powered by a 12V battery. The receiver and the microcontroller operate with a 5V power supply. The optocouplers, transistors, and relays use a separate 12V power supply to isolate the high voltage devices attached to the relay contacts from the low voltage devices use in this circuit just like the microcontroller and receiver.

MCP9600 Thermocouple EMF to Temperature Converter

A thermocouple is a device that acts as a temperature to voltage transducer. In this circuit, a type K thermocouple is inserted at the input side of the type K thermocouple adapter or connector, PCC-SMP-K-100. This design can be used in different applications such as industrial equipment thermal management, ovens, industrial engine thermal monitor, temperature detection racks, etc.

IR Remote Control Jammer

This infrared jammer is designed to interrupt infrared signals that can be used as a security system for such devices which works by corrupting the data being sent by normal remote controls. The microcontroller in this design allows six of the main IR frequencies to be targeted. Read more