The SafeDuino is an Arduino Mega 2560, a Bluetooth Module BTM-5
Class 2 with approximately 10 meters of range, a RFID reader that
can read tags of 125Khz frequency, and a dedicated battery. As
the vehicle provides an energy source of 12 V, a battery of 12 V
and 7A was chosen. That battery can be recharged in the own vehicle
with a cigarette plug. All the SafeDuino’s components work with
an input of 5 V. That way, we designed a Drive board that converts
the 12 V of the input for the 5 V needed. In this way, the board
was able to supply energy for all the components without variations
of tension. The board also reduces the quantity of connected
wires between the SafeDuino’s components, interconnecting them
through conductive tracks, as seen in Fig. 8(a). We used serial communication,
through the RX and TX pins, to implement the communication
between the Arduino Mega 2560 and the Bluetooth and the
RFID Modules. We fixed all the components inside a metallic box,
properly isolated. The box has a cooler, which does the refrigeration
of component, avoiding them damage, as the Fig. 8(b) shows.