2.54MM PIN OUT---The 4 key keyboard module is of GND K1 K2 K3 K4" 4 PIN OUT 2.54mm
SUITABLE FOR---The delay relay module is suitable for auto modification, motor control, bulb, LED light string, micro pump, solenoid valve
4-BUTTON KEY MODULE---This is a 4-button common cathode key module(When pressed output low level)
MAIN USAGE---The 4 key keyboard module can be inserted directly into u/no mega2560 due,Ideal for linking up to your U/NO Mini Nano Mega2560 Breadboard banana pi etc,or others MCU PLD CPU ( AVR STM32 ARM PIC C51 NRF24LE1 CC2530 MSP430 STM8 FPGA CPLD etc.)
DURABILITY ENSURING---Adopting high quality electronic components, and preciseness process, the 4 key keyboard module is of long serving time, with good durability