FLEX SENSOR BASED HAND-TALK GLOVE

Abstract

The hand-talk glove also known as sign language translator is very useful device for paralyzed or
speech-impaired persons those who can’t speak by birth and main objective of this device is to translate hand
signs in to talk mode. The hand signs are denoted as folded fingers or strait fingers and if any finger is folded
particular sensor generates a variable voltage. This variable voltage will be processed using op-amp IC’s by
which it generates logic signals for the microcontroller chip. We can use 4 sensors for four fingers and
accordingly 4 different signs can be created to generate 4 different voices like get me a glass of water, etc,
voice commands can be generated from the multi-channel voice chip. Since it is a prototype model, only one
sensor is used for demo purpose and this sensor is attached to the hand glove. When the finger is folded, the
controller activates the voice channel through relay by which the pre-recorded voice will be generated through
speaker. This is user friendly device that provides voice output for a sign gesture input. Flex sensor is used to
create variation in the voltage, to do so a fixed resistor will be connected in series to this sensor to form a
potential dividing network. The resistance of the sensor will vary according to its bend position and based on
this variation it generates a reference voltage which will be compared with op-amp IC. When the reference
voltage increases to greater than fixed potential, comparator output will become high and based on this signal,
the controller chip energizes the pre-recorded voice channel. 8- Channel voice record cum play back chip is
used, but here only one channel is enough to prove the basic concept. If required 8 different messages can be
announced.