Description: 1.32 IO pins all the leads. 2. Classic ATmega16 minimum system, eliminating the trouble of welding 3. Crystal: The welding socket hole, the convenience of buyers to replace the crystal, the crystal default hair 8M 4. Support chip: ATmega16 / ATmega32 and pin-compatible with the above-described chip chip 5. Power supply: power supply adapter or external expansion connector pin power supply (not support ISP download interface power supply) 6. DC-005 Power Block ( supporting the transposon is 5.5 * 2.1 ) 7. 4-way foreign expansion VCC, GND, as shown in FIG pin 8. Reset: power-on reset and reset button 9. Power indicator (D1) and the program running indicator (D2) 10. The standard ISP download interface, by using our shop 51 / avr downloading can easily download the minimum system implementation (the board needs a separate power supply, do not support ISP download interface power supply)