Eight way responder system 51 Single Chip Microcomputer Design [with Proteus simulation, C program, schematic diagram, PCB files, component list and papers, etc.]

The design requirements
1） The responder is also available for 8 Players or 2 A team game , Use them separately 8 Button S0-S7 Express ;
2） Set a system clear and answer control switch S, The switch is controlled by the host ;
3） The responder has the functions of latch and display . That is, the player presses the button , Latch the corresponding number , And keep the number of the first responder until the host clears the system ;
4） The responder has the function of timing responder , And the time of a rush answer is set by the host （ Such as 30s etc. ）. When the host starts “ Start ” After keystroke , The timer decrements , At the same time, the speaker makes a short sound , The duration of the sound is 0.5s about ;
5） The contestants will rush to answer within the set time , Answer effectively , The timer stops working , The display shows the contestant's number and the answer time , And keep it until the host clears the system ;
6） If the timing time comes , No one answered , This rush answer is invalid , The system alarms and forbids answering , The timing display shows 00;
7） Design software programming method , And write the source code ;
8） The host and slave realize wireless response ;
9） use Proteus Conduct simulation ,Altium Designer Draw the schematic and PCB;

summary
This paper introduces the composition of the circuit of digital display eight channel responder 、 Design and function , The responder not only has the basic responder function , It also has the functions of timing and alarm . The host preset the time for rush answer through the time preset switch , The system will complete the automatic countdown .

If there is a rush to answer within the specified time , The timing will stop automatically , If no one answers within the specified time , Then the buzzer in the system will sound , Prompt the host that this round of rush answer is invalid , Realize the alarm function , If the response time is exceeded, the response will be invalid .

The system adopts 51 Single chip microcomputer is the core of the whole control system . The control system is mainly composed of ： Display module 、 Control module 、 It is composed of alarm module and emergency response module .

Working hours , The system inputs the rush response signal through the matrix keyboard , After being processed by single chip microcomputer , Output control signal , Using a 4 Digital tube to complete the display function and alarm with buzzer , Use the keys to let the contestants answer , Display which group answers first on the nixie tube , So as to realize the whole rush to answer process .

proteus Simulation circuit diagram

System schematic diagram

PCB chart

Analysis of simulation results
load “ Eight way responder .hex” File to 51 Single chip microcomputer , Click on the run . After the eight way responder program is initialized , The nixie tube shows ：----. Wait for the host to press the key to enter .

Press down “ host ” key , The nixie tube shows ：00-0. here , Can pass “ timing +” and “ timing -” key , Set the timing time . In this case , We set the timing time to 30 second .


Press again “ host ” key , The buzzer beeps , Countdown starts ,8 Contestants can start to answer . hypothesis 3 Contestant No , Answer successfully within the time limit . here , Count stop , The nixie tube displays the remaining timing and the current player number , Their corresponding 3 Number LED The light is on .

count down , And then there were 5 seconds , If there are still no contestants to answer , At this time, the buzzer gives a continuous prompt sound . If the timing ends , No one answered , At this time, the nixie tube displays ：00-0; Press down “ host ” key , The nixie tube shows ：----; Press again “ host ” key , Show 30-0; If the timing time is not modified , Press again “ host ” key , A new round of timing begins .

If , When the host doesn't start timing , That is, before the rush to answer , Someone scrambled to answer . hypothesis 2 Contestant No , At this time, the nixie tube displays ：FF-2, The buzzer keeps ringing ,2 Number red LED The light is on . After the player answers for a foul , Press down ‘ host ’ key , The buzzer stops , The nixie tube shows ：00-0, The host sets the time , restart .

part C Code

/********************************************************  The name of the function :void scan(void)  Function function : Key detection function   Parameter description : ********************************************************/ 
void scan(void)
{
    	
	uchar qiangda_num=0;
	// Host key 
	if(key_zhu==0)		   // Press the key 
	{
    
		delayms(7);		   // Show dithering 
		if(key_zhu==0&&zhu_f!=2&&qiang_f==0&&wan_f==0)// Judge whether someone has committed a foul or whether the rush to answer has started or whether the rush to answer has been completed 
		{
    
			zhu_f++;	   // Match phase marks +1
			if(zhu_f==2)   // The game officially begins 
			{
    
				TR0=1;	   // The game begins , Opening timing 
				wan_f=0;   // Clear the game completion flag 
				bajing();  // Prompt the start of the game 
			}			
		}
		else
			if(key_zhu==0&&qiang_f==1)   // Judge whether someone has committed a foul 
			{
    
				buzz=1;					 // Clear the alarm 
				qiang_f=0;				 // Clear the answer flag 
				number=0;				 // Clear player number 
				time=EEPROM_read(0x2000);// The total time of re reading the stored response 
				led_kongzhi(0,0,0);
			}
			else						 
				if(key_zhu==0&&wan_f==1) // Determine whether someone has completed 
				{
    
					buzz=1;				 // Clear the alarm 
					wan_f=0;			 // Clear the... Completion flag 
					number=0;			 // Clear player number 
					time=EEPROM_read(0x2000);// The total time of re reading the stored response 
					led_kongzhi(0,0,0);
				}
				else
					if(key_zhu==0&&zhu_f==2) // Pause the game 
					{
    
						TR0=0;				 // Turn off timing 
						zhu_f=1;			 // Go back to setting the game time 
						bajing();			 // Prompt to suspend the game 
					}
		while(!key_zhu);// The detection key is released 
	}

	// Bonus key , Support to click 
	if(key_jia==0&&zhu_f==1&&qiang_f==0)	 // Determine whether the countdown time is being set 
	{
    
		delayms(7);							 // Delay chattering 
		if(key_jia==0)						 // Press the judgment key again 
		{
    
			if(time<99)	                     // Maximum game time 99S
				time++;					 	 // Time of the game +1S
			EEPROM_delete(0x2000);			 // erase EEPROM Fan District 
			EEPROM_write(0x2000,time);		 // write in 【 Time of the game 】 Save the data 
			display(time/10,time%10,10,0);	 // Display and set the game time 
		}
	}

	// Impairment key , Support to click 
	if(key_jian==0&&zhu_f==1&&qiang_f==0)	 // Determine whether the countdown time is being set 
	{
    
		delayms(7);							 // Delay chattering 
		if(key_jian==0)						 // Press the judgment key again 
		{
    
			if(time!=0)	  					 // Minimum game time 0S
				time--;		                 // Time of the game -1S
			EEPROM_delete(0x2000);			 // erase EEPROM Fan District 
			EEPROM_write(0x2000,time);		 // write in 【 Time of the game 】 Save the data 
			display(time/10,time%10,10,0);	 // Display and set the game time 
		}
	}
	// The player presses the key 
	qiangda_num=qianda();
	if(qiangda_num!=0)                              // Determine whether a player presses the button 
	{
     
		if(zhu_f!=2&&qiang_f==0&&wan_f==0)// If you haven't started answering, press 
		{
    
			zhu_f=1;
			buzz=0;						  // Buzzer alarm 
			qiang_f=1;					  // Rush to answer the foul mark 
			number=qiangda_num;
			led_kongzhi(number,1,0);
		}
		else
			if(zhu_f==2&&wan_f==0)			 // Press... When starting the rush answer 
			{
    
				wan_f=1;					 // Mark the answer complete 
				zhu_f=0;					 // Host mark reset 
				TR0=0;						 // Turn off the countdown timer 
				number=qiangda_num;
				led_kongzhi(number,1,0);
				bajing();					 // Prompt someone to answer 
			}
	}  
}

/*********************************************************  The name of the function :void main()  Function function : Main function   Parameter description : *********************************************************/
void main()
{
    
	uchar i=0;
	T0_init();						 // Timer initialization 
	if(key_jian==0)	  
	{
    
		delayms(100);
		if(key_jian==0)
		{
    
			EEPROM_delete(0x2000);	 // erase EEPROM Fan District 
			EEPROM_write(0x2000,30); // write in 【 Time of the game 】 Save the data  
		}
	}
	time=EEPROM_read(0x2000);		 // Read stored 【 Time of the game 】 data 

	for(i=0;i<9;i++)
	{
    
		led_kongzhi(i,1,1);
		delayms(10);	
	}

	for(i=9;i>0;i--)
	{
    
		led_kongzhi(i-1,0,1);
		delayms(10);	
	}
	led_kongzhi(0,0,0);
	while(1)						 // Dead cycle 
	{
    
		scan();						 // Key detection processing 
		if(zhu_f==0&&wan_f==0)		 // Judge whether it has not entered the competition stage 

The shared resources are
（1） be based on 51 MCU eight way responder system design graduation thesis complete version ;
（2）Proteus Simulation file ;
（3）Keil C Program files ;
（4） List of components ;
（5）Visio flow chart ;
（6） Schematic diagram and PCB file ;

Resources are shared as follows





Resource acquisition method
Resource acquisition method
Resource acquisition method
Important things are to be repeated for 3 times ！！！！！！！！！！！,
Get a complete eight way Responder design paper 、Proteus Simulation 、C Program 、PCB And schematic diagram 、Visio flow chart 、 A complete set of information such as component list . Please search WeChat for official account ： Jiaoyuan Xiaozhi