Tag Archives: Atmega128

Gesture glove to vocalize sign language

The Fall semester of 2014 is now over and we get to see some new and exciting embedded projects from students of Cornell published on Bruce Land’s ECE4760 class website. Monica Lin and Roberto Villalba have made a gesture glove for people with hearing disabilities. This device is intended to help them to better communicate with other people by converting their gestures into speech. For their project, they used five flex sensors to sense and quantify the bending of each finger, and the MPU-6050 (a 3-axis gyroscope and a 3-axis accelerometer) sensor to detect the orientation and rotational movement of the hand.

They write:

We designed and built a glove to be worn on the right hand that uses a Machine Learning (ML) algorithm to translate sign language into spoken English. Every person’s hand is a unique size and shape, and we aimed to create a device that could provide reliable translations regardless of those differences. Our device uses five Spectra Symbol Flex-Sensors that we use to quantify how much each finger is bent, and the MPU-6050 (a three-axis accelerometer and gyroscope) is able to detect the orientation and rotational movement of the hand. These sensors are read, averaged, and arranged into packets using an ATmega1284p microcontroller. These packets are then sent serially to a user’s PC to be run in conjunction with a Python script. The user creates data sets of information from the glove for each gesture that should eventually be translated, and the algorithm trains over these datasets to predict later at runtime what a user is signing.

Gesture glove to convert sign language into speech

Gesture glove to convert sign language into speech

And, don’t forget to watch their demo vide posted below.

Looking for expanding RAM for your Atmega128?

An Atmega128 microcontroller has got 4K of built in static RAM, which is pretty enough for small and medium range projects that do not involve huge amount of data processing. But if you think you need more than that for your application, you can expand it by adding an external RAM chip. This article shows how you can expand the RAM capacity of Atmega128 up to 64K.

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A multifunction digital meter using Atmega128

This is a multifunction bench test instrument built using an Atmega128 microcontroller and incorporate a lot of functions like voltmeter, ammeter, logic analyzer, frequency generator, frequency counter and also provides regulated DC power supply.

This device is interfaced with a Windows PC to display the measurements. The PC software is developed in VB 6. The function generator is based on a MAX038 IC that can provide sine, triangle or square wave, with adjustable duty cycle, from about 1 Hz to > 20 MHz.
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