282
C. Drug˘ a et al.
Fig. 6 Massive synthesizer
Fig. 7 Sound amplification with 10 dB
The I2C LCD adapter reduces the number of pins 16 to 4, and it can be connected
to a compatible 16 × 2 or 20 × 4 character display module that supports the 4-bit
mode [11]. This card has an I2C PCF8574 chip that converts I2C series data to
parallel data for the LCD display. The I2C address is 0 × 3F by default, but this
can be changed by three soldering jumpers provided on the board. This allows up to
three LCD displays to be controlled via a single I2C bus (giving each of their own
addresses) [11]. To make it more ergonomic and more esthetical, a ribbon cable with
IDC connectors was used to connect the central panel and the development board to
the rest of the PCB board components. This connects the headphone jack with the
C. Drug˘ a et al.
Fig. 6 Massive synthesizer
Fig. 7 Sound amplification with 10 dB
The I2C LCD adapter reduces the number of pins 16 to 4, and it can be connected
to a compatible 16 × 2 or 20 × 4 character display module that supports the 4-bit
mode [11]. This card has an I2C PCF8574 chip that converts I2C series data to
parallel data for the LCD display. The I2C address is 0 × 3F by default, but this
can be changed by three soldering jumpers provided on the board. This allows up to
three LCD displays to be controlled via a single I2C bus (giving each of their own
addresses) [11]. To make it more ergonomic and more esthetical, a ribbon cable with
IDC connectors was used to connect the central panel and the development board to
the rest of the PCB board components. This connects the headphone jack with the