【正文】 dpD5abfcgdeDPYabcdefgdpdpD6D5D6品振品振復(fù)位RST9XTAL119EA/VPP31RXD/P3.010INT0/P3.212INT1/P3.313T0/P3.414T1/P3.515P0.0/AD039P0.1/AD138P0.2/AD237P0.3/AD336P0.4/AD435P0.5/AD534P0.6/AD633P0.7/AD732P1.01P1.12P1.23PSEN29XTAL218RD/P3.717WR/P3.616TXD/P3.111ALE/PROG30P2.7/A1528P2.6/A1427P2.5/A1326P1.78P1.67P1.56P1.45P1.34P2.4/A1225P2.3/A1124P2.2/A1023P2.1/A922P2.0/A821U?STC89C52 VCC設(shè)定時間（前三位）剩余時間（后三位）復(fù)位電路振蕩電路單片機電路8位鎖存器38譯碼器40GND20保溫加熱器出煲煮加熱器出選擇輸入120分輸入180分輸入清零輸入70度比較80度比較4D14D2564333154D34D44D5IN4148X54R14R24R34R44RT130K按鍵中斷入3D13D4IN41483S23S33S4VCC3R13R41KGND3S1按鍵電路4R5 33030K電位器4VR1VCC電壓比較器4U1 LM393675GND4R6100K4R7100K4R85.1K4C10.01uF熱敏電阻溫度檢測電路GND4D6IN41484R91K4C2100PGND6位數(shù)碼管時間顯示電路6R14.7K測溫輸入 蜂鳴器輸出訊響電路6VT190136B1蜂鳴器GNDVDD2VT19013GND2VD1IN4001繼電器線圈2J12R151功率控制電路2R44.7K2VT290132R3220+10VVDD2C1470u/25VGNDVin1G N D2Vout35VLM7805穩(wěn)壓GNDVCC +5V2C2100u2C30.01uGNDGND12342B1整流橋堆GND2T1電源變壓器2F110AAC220VNL保險絲2K1常開觸點 2C40.01u2C50.001/600V2L1300W2L2100W2R58M2R2100煲煮加熱器保溫加熱器2VS1可控硅GND加熱電路90度比較100度比較測溫微電腦控制藥膳煲的控制部分設(shè)計電信0903 李晏 附錄 26 附錄 B： C 語言程序 C 語言程序 include include define uchar unsigned char sbit bwjr=P0^0。 // 定義為 “120 分按鍵 ”輸入口 。 // 定義為 “煲煮加熱 ”輸出口 sbit xzaj=P0^2。 單向可控硅的工作原理 ...................................................................................................... 3 單向可控硅的使用注意事項 ............................................................................................... 3 繼電器介紹 ........................................................................................................................... 4 繼電器的工作原理和特性 ................................................................................................... 4 繼電器的 作用 .................................................................................................................... 4 繼電器的 技術(shù)參數(shù) ............................................................................................................. 4 繼電器的 參數(shù)選擇 ............................................................................................................. 5 繼電器的 測試點 ................................................................................................................. 5 74HC138 38 譯碼器 介紹 ..................................................................................................... 5 74HC245 8 位鎖存器 介紹 .................................................................................................... 6 三端穩(wěn)壓器 LM7805 介紹 .................................................................................................. 6 LM7805在使用時的注意事項 .............................................................................................. 6 LM7805的引腳序號與引腳功能 .......................................................................................... 7 電壓比較器 LM393 介紹 ..................................................................................................... 7 第 3 章 控制電路設(shè)計 .......................................................................................... 9 藥膳煲的總電路設(shè)計方案 ................................................................................................... 9 各模塊電路的設(shè)計實現(xiàn) ....................................................................................................... 9 目錄 ii 單片機及其外圍電路 .......................................................................................................... 9 時間顯示電路與數(shù)碼管電路 ..............................................................................................10 按鍵電路 .......................................................................................................................... 11 溫度檢測電路 ...................................................................................................................12 訊響電路 ..........................................................................................................................13 加熱電路與溫 度控制電路 ..................................................................................................14 電源電路 ..........................................................................................................................15 第 4 章 軟件設(shè)計 ................................................................................................ 17 C 語言介紹 .......................................................................................................................... 17 軟件編程構(gòu)思 .......................................