• On board IO expanders IC PCF8574T, provide extra 8 IO ports.
    • IO P0 P1 P2 P3 P4 are connected to joystick, corresponding to left, down, press, right and up.
      • Joystick common pin can connect to VCC or GND, to ease your programming. Selectable by backside jumper, default to ground.
    • IO P5 is connect to a buzzer. This can be disconnected by on board jumper.
    • IO P6 P7 are not connected to anythings.
  • On board ADC expander IC PCF8591, provide extra 4 analog read.
    • AIN0 AIN1 are not connected to anythings.
    • AIN2 connects to any analog sensor read port, default mount a light cell sensor. Can be disconnected via jumper.
    • AIN3 connects to on board trim pot potentiometer, for testing purpose only. Can be disconnected via jumper.
  • On board power LDO, and logic shiftier for IIC. LDO supply up to 500mA/16V.
  • Two groups of 3.3V, GND, SCL, SDA pins, cascadable design, can connect as many IIC devices as you want.

Schematic please see here.

Demo code here or search in project PCF (heart light of Aout LED, ADC read, joystick to different beep sounds) Please enable disable sub functions in loop.

Additional information

Weight 0.01 kg


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