1 2 3 4 U_Power_Module Power_Mo d ule.SchDoc A B C D A B C D U_Serial_Module S e r i a l _ M o d u l e . S c h D o c U_MCU_Module U_EEPROM_Module EEPROM_Module.SchDoc MCU_Mo d ule.SchDoc S e r i a l Serial IIC IIC U_Ds18b20_Module Ds18b20_Module.SchDoc U_LCD_Module LCD_Module.SchDoc D S 1 8 b 2 0 DS1 8 b 20 LCD LCD U_KEY_Module KEY_Module.SchDoc K E Y KEY U_DS1302_Module DS1 302_Mo d ule.SchDoc U_IRDA_Module IRDA_Module.SchDoc D S 1 3 0 2 D S 1 3 0 2 I R D A IRDA T i t l S i z e : A 4 N u m b e r : 1 R e v i s i o n : D a t e : 2 0 1 2 - 1 1 - 2 8 T i m e : 1 3 : 1 0 : 4 2 S h e e t 1 o f 1 F i l e : D:\Altium Designer Summer 09\My_Pr o j e ct\52 \DIY-STC\PCB_II\Top_mo d ule.Sc h D o c 1 2 3 4 1 2 3 4 A B C D A B C D serial_Harness MCU_TXD MCU_RXD serial_2 Serial serial_1 VCC VCC 1 0 4 C4 U1 J2 1 2 3 4 5 6 7 8 1 1 1 1 1 1 1 9 6 5 4 3 2 1 0 C11 CL+ V+ CL- C2+ C2- V- VCC GND T1OUT R1IN R1OUT T1IN T2IN 1 6 2 7 3 8 4 9 5 1 1 0 0 4 4 C 5 6 C GND MCU_TXD MCU_RXD T2OUT T2IN R2OUT MAX232 C7 serial p o et 1 0 4 VCC M C U _ R X D R 1 DS1 DS2 GND GND 1K M C U _ T X D R2 1 K T i t l S i z e : A 4 N u m b e r : 1 R e v i s i o n : D a t e : 2 0 1 2 - 1 1 - 2 8 T i m e : 1 3 : 1 0 : 4 2 S h e e t 1 o f 1 F i l e : D:\Altium Designer Summer 09\My_Pr o j e ct\52 \DIY-STC\PCB_II\Serial_Mo d ule.Sc 4 h D o c 1 2 3 1 2 3 4 A B C D A B C D D1 U8 SW1 J1 1 3 2 1 3 I N O U T VCC SW GND Di od e 1 N 4 0 0 1 L 7 8 0 5CP C1 CapPol1 470pF PWR2.5 C2 C3 Cap 104 1 0 0 p F G N D G N D G N D G N D GND DS3 LED R9 V C C GND Res1 4.7K T i t l S i z e : A 4 N u m b e r : 1 R e v i s i o n : D a t e : 2 0 1 2 - 1 1 - 2 8 T i m e : 1 3 : 1 0 : 4 2 S h e e t 1 o f 1 F i l e : D:\Altium Designer Summer 09\My_Pr o j e ct\52 \DIY-STC\PCB_II\Power_Mo d ule.Sc 4 h D o c 1 2 3 1 2 3 4 DS1 3 0 2 _ Ha r n ess DS1 DS1 DS1 302_SCLK 302_IO 302_RST A B C D D DS1 DS1 S 1 3 3 3 0 02 02 2 _ _2 _3 1 A B C D D S 1 3 0 2 serial_Harness serial_2 MCU_TXD MCU_RXD Serial serial_1 LCD_Harness LCD_D0 VCC LCD_D0