DIL40 microcontroller socketOn Board Power supply(12VDC to 5V)Quartz crystal 4 MHzULN 2003 To drive Stepper Motor& RelaysExtension Slot for all IOReset buttonPower plug-in DC SocketExtension slot on every microcontroller IO12V DC input adopter connector and Wire to Board connectorRemapable Jumper connectors for IO portsMAX 232 Unit for serial communication and programmingSeparate debugger pin outON/OFF switch for D PortTwo analog input for ADC channel24C04 IC for I2C section8 LED array connected in PORTBFive External connector for2*16 LCD with Brightness controlOne interrupt reset switch on RB0
