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Characteristics of Cervus:

- It has a switch on the board.

- Power input by 3.5mm terminal block.

- Front reset button (accessible with shield).

- Voltage selector 5V or 3.3V

- 8 open collector Darlington buffers.

- Tx / Rx connector for Bluetooth module

- Tx / Rx connector for ESP-01 module.

- Buzzer (can be disabled by bridge)

- Strip of pines D8-D13, GND and Aref. Compatible with Stripboard.

- Selectors (plate welding) to connect or disconnect the leds

 Tx, Rx and L13.