基于AVR单片机的便携式醉酒驾驶仪器设计——包含原理图.doc

1AVR ATmega16LED ATmega16 Abstract The design works based on single-chip microcomputer, using alcohol ATmega16sensor, realize the alcohol concentration of air environment through real-timemeasuring, LED digital display, once more real-time tube threshold, which can beused for car buzzer alarm monitor and warehouse fire.2 1 42. 42.1 42.2 42.3 63. 83.1 83.2 83.3 LED 93.4 104. 114.1 114.2 114.3 124.4 134.5 145. 146. 147. 147.1 147.2 15 18A 18B 20C 233 : ()(LED)LEDLED? 1 MQ303Mega16Led0-5LED2 MQ3033Led4ATmega16ADCDACMQ3A/D:14SR410561k5 1. :2. :3. 3 :6PCB7 AVRmega16A/DA/D11 PORTAPORTBLEDPORTCLED2ADC0-5v14. ADC7.3728M32T02ms5. 2ms28 6. 54 LEDLED69 65A/DPA510 7 1MQ303A1.5v30-5VA/DLEDLED2 11 ICCAVRCVAVRAVR Studio ADC (ADIF )ADC (ADCL, ADCH)102421010 12:3AVR StudioAVRStudio41 PCB2 MQ-33 100-100004 5 137. : 156% 2MQ3030.9-1.0v482.20.2V5102v51.5v3 MQ303A1AVRATmega1614Led15mh10410k3608 1 2006 2avr 2005 A 1 V H 0.9V 0.1V AC or DCV C 6 V DCR L P S 10 mWR H8. 5? 0.5 ?IH 12020mAPH 140 mWPS 10 mW14B. Tao -20 o C+50 o C20ppm-1000ppmTas -20 o C+70 o CRH 95% RH(O2) 21%1%() 16%C. MQ303A Rs (4k? to 400 k?) (0.50 0.15)Rs (300 ppm) / Rs (100 ppm) : 20 o C 2 o C V C : 3.0 V 0.1 V DC: 65% 5% V H : 0.9 V0. 1 V DCR L :48322001BAC(in mg/L) = BrAC(in mg/L) x 2200BACBrACinmg/L/22002000210015GA307-20010.20.8mg/ml(0.8)2005000.8mg/ml()5002000B /CICCAVR/ICC-AVR application builder : 2010-4-16/ Target : M16/ Crystal: 7.3728Mhz#include #include flash unsigned char led710=0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90;/09flash unsigned char position4=0x01,0x02,0x04,0x08;/unsigned char dis_buff4=0,0,0,0,posit;/int time_2ms_ok;/unsigned long i