The project consists of a gadget that
enables blind people to exchange texts using the brail method, it combines two
parts. The first part is the sender; a Brail keyboard that enables them to
write a word, then send it via radio technology. It also has the option of
cancelling the message. To make this exchange possible, we have used three
microbit cards because the number of connectors in each card is insufficient to
construct a full keyboard; every alphabetic character has an equivalent in the
Brail keyboard, which is linked to a mini micro lockless button. This button
has two connectors, one is linked to GND, the other to the pin in the microbit.
The second part is concerned with the
reception of the text message; the constructed gadget enables the receiver to
read the word letter by letter, based on a matrix composed of six mini
solenoids push pull 5 Volts. For example, if the character is “B”, we activate
the two solenoids linked to pin 14 and pin 1. We used a specific button to go
from one character to another. We should note that it is possible to read full
words if we had the means to install five receptive matrixes instead of one. We
also used one more optional microbit that shows the received text in
alphabetical letters.
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