|  | On-board USB programmer (no need to purchase an external programmer). Free 2K limited demo compiler included. | 
    
      |  | MikroElektronika-standard IDC10 connectors, used to easily add functionality by connecting any of a huge range of accessory boards (see "Related Items"). | 
    
      |  | Example programs. | 
    
      |  | USB or external AC/DC power supply option. | 
    
      |  | LEDs and buttons connected to all available port pins (buttons can apply logic high or low when pressed). | 
    
      |  | Pull-up / pull-down option on all port pins. | 
    
      |  | Contrast adjustment on COG, LCD and GLCD displays via  potentiometers. | 
    
      |  | Reset button. | 
    
      |  | Supports Atmel 8051 microcontrollers in 18-, 16-, 20-, 28- and 40-pin DIP packages, and 32-, 44-pin PLCC packages. | 
    
      |  | Comes with a AT89S8253 microcontroller. | 
    
      |  | Includes a 2x16 COG (chip-on-glass) display and 4 7-segment displays, and has place for a 2x16 LCD display and a 128x64   KS0108-type GLCD display (sold separately). | 
    
      |  | DS1820 temperature-sensor connector (DS1820 sold   separately). | 
    
      |  | Potentiometer for ADC (analogue-to-digital   converter) input. | 
    
      |  | RS-232 (with MAX232) connector. | 
    
      |  | 4x4 matrix keypad and menu   keypad (directional buttons). | 
    
      |  | Precise 4.096V reference voltage available for ADC (analogue-to-digital   conversions). | 
    
      |  | Port expander enabling additional inputs / outputs. |