• reserves ARDUINO pins 4, 5, 6, 7, 8, 9 and 16 (marked on the PCB)
• PWR LED
• ICSP connector fitted
• about the display:
  • basic HD44780-compatible 2x16 character LCD display
  • blue background, white characters
  • LED backlight
  • multi-turn trimmer for contrast adjustment
• about the buttons:
  • RESET
  • a resistor ladder whose voltage level when pressed can be read from analog input A0 (SELECT, LEFT, RIGHT, UP, DOWN)
• about usage:
  • uses the Arduino-shipped LiquidCrystal.h library
  • initialization with pin layout LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
• dimensions: 79 x 58 x 12 mm
  • total stack height for example with Arduino Uno max. 28 mm

Tip from Partcon Workshop

The voltage divider values produced by the buttons were measured with Arduino's analogRead(A0) function. When nothing is pressed it gives the value corresponding to 5V, i.e. 1023. Here are the measurements:

SELECT: 641
LEFT: 409
RIGHT: 0
UP: 98

The supply voltage for the switches can be changed to 3.3V (STM32NUCLEO) by changing the supply resistor R2. However, this requires a bit of manual dexterity.