AVR开发板原理图1 2 3 4 5 6 7 8 JP5 CON6 1 2 3 4 5 6 VCC C1 104 VCC C2 104 GND VCC C3 104 GND VCC C4 104 GND VCC C5 104 GND VCC C6 104 GND VCC C7 104 GND VCC C8 104 GND VCC C9 104 GND VCC C10 104 GND U5 VCC D R2 10K GND C0 C1 R3 10K J3 D 1 A 2 B 3 C POWER JACK F1 300mA L1 VCC VCC VCC GND VCC GND VCC GND GND CN1 C21 100uF/16V C22 100uF/16V GND GND VCC RW1 LCD_V J1 1 6 2 7 3 8 4 9 5 DB9 C13 104 C14 104 J2 1 6 2 7 3 8 4 9 5 DB9 LCD VCC C11 104 GND GND C12 104 1 2 3 4 5 6 7 8 U3 C1+ VCC V+ GND C1- T1out C2+ R1in C2- R1out V- T1in T2out T2in R2inR2out MAX232 16 15 14 13 12 11 10 9 VCC GND RXD1 TXD1 D1 D0 GND VCC GND LCD_V C6 D3 D4 D6 D7 B0 B1 B2 B3 B4 B5 B6 B7 LCD_LED GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 CON20 U1 JP1 B0 B1 B2 B3 B4 B5 B6 B7 1 2 3 4 5 6 7 8 SW……