The 7-Seg Click Board™ is an accessory board that allows users to add a 2-digit seven-segment display to the device. This compact board includes two onboard 74HC595 8-bit serial-in, parallel-out shift registers and two seven-segment displays. The 74HC595 shift register has an 8-bit storage register and an 8-bit shift register. The data is written to the shift register serially and then latched onto the storage register. The 7seg Click Board™ uses the Serial Peripheral Interface (SPI) to communicate with the target board microcontroller. The board is designed to operate using a 3.3V or 5V power supply, selectable by an SMD jumper. The power indicator LED is available onboard.
The 7-Seg Click Board™ is ideal for adding a popular 7-segment display to the device while using only 4 microcontroller pins. The green LED denotes the status of the power supply.