The structure designed for the Blockchurna voting system is based on the Brazilian Electronic Voting Machine, model UE2015 (see Figure 1).
Figure 1 - Brazilian Electronic Voting Machine model UE2015.
The front panel accommodates the 7-inch LCD screen, positioned on the center-left. Below the screen, on the bottom left, lays the biometric sensor, embedded with just the tip exposed, allowing easy access to identify users while keeping the sensor well protected. To the right of the screen, the keyboard spans the width of the right section. This configuration is intended to make it easy to interact with the voters.
Figure 2 - The Blockchurna’s front and right side design.
On the right side there are some roles drilled (labeled as 4 on Figure 3) to serve as ventilation by accomodating a 80mm cooler. On the front some cuts are made to fit the keyboard (1), screen (2) and the biometric sensor (3).
Figure 3 - Cuts to be made on the front and right side of the structure.
On the back side there are two holes: one for the power supply connector (label 7), one for the USB connector for the thermal printer to be connected to (6). Also, there is a chamber (5) to safely store a pendrive, which will contain the votes made on that voting machine. This, later on, will be covered with a lid (Figure 6) sealed with a paper seal to detect openings and so the possibility of fraud.
On the left side there is a hole to accomodate the speaker (8) to play sounds once the person has voted and also a hole (9) to connect the earphones on a P2 connector, so people with **Visual impairment** can have sound accessibility and vote securely.
Figure 4 - Cuts to be made on the back and left side of the structure.
Figure 5 - Detail of the pendrive chamber.
The chamber will be covered and sealed, below we have the model of the lid.
Figure 6 - Chamber lid.
Below is a technical drawing of the structure.
Figure 7 - Technical drawing of the structure.
Along with the alphanumeric writing, the keys will have braille writing for accessibility.
Figure 8 - Keyboard keys.