DC motor control system based on DAC0832

Use DAC0832 To control the DC motor

Input digital quantity 0X00~0XFF Corresponding output 0~5V The voltage value of

Use the knowledge of analog circuit to design the circuit to realize the forward and reverse rotation of the motor , The nixie tube displays the speed value and positive and negative rotation in real time .

The first digit of the four digit nixie tube shows positive and negative 、1 Indicates forward rotation 、0 Indicates inversion , The last three digits show the speed value

DAC0832 Adopt bipolar control ,D0~D7 Data input port ,IOUT1、IOUT2 Complementary output port ,RFB Feedback port 、

VREF Reference voltage value （ It's usually 5V）.

The triode part is simulated through two I/O Mouth to control to achieve positive and negative , If there is no triode, the part can only rotate in one direction

The main function

#include <REGX52.H>
#include "Delay.h"
#include "Key.h"
#define DAC0832  P1//DAC0832 Data port definition 

sbit zz=P2^0;// Positive and negative definitions 
sbit fz=P2^1;
sbit we1=P3^0;// Bit selection definition 
sbit we2=P3^1;
sbit we3=P3^2;
sbit we4=P3^3;

unsigned char NixieTable[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};// Common cathode segment code table 
unsigned char KeyNum;
unsigned int Speed=70;// Define send to DAC0832 Initial speed value of 

void Nixie();// Nixie tube display function 

void main()
{
	DAC0832=0x00;
	while(1)
	{	
		KeyNum=Key();// Get key value 
		switch(KeyNum)
			{
				case 0:
						break;
				
				case 1:
					zz=0;
					fz=1;
						break;
				
				case 2:
					zz=1;
					fz=0;
						break;
				
				case 3:
					Speed=Speed+5;
					KeyNum=0;
						break;
				
				case 4:
					Speed=Speed-5;
					KeyNum=0;
						break;
			}		
		DAC0832=Speed;// Digital input conversion voltage value 
		Nixie();
	}		
}
void Nixie()
{
	unsigned int x=0,y=0,z=0,peed;
	
	peed=Speed;
	x=peed/100;
	y=(peed-x*100)/10;
	z=peed%10;// Take the number of each bit of the speed and display it 
	
	if(zz==1&&fz==0)
	{
	we1=0;
	P0=NixieTable[1];	// The nixie tube shows 1, Positive rotation 
	Delay(5);				
	we1=1;
	}
	
	if(zz==0&&fz==1)
	{
	we1=0;
	P0=NixieTable[0];	// The nixie tube shows 0, reverse 
	Delay(5);				
	we1=1;
	}
	
	we2=0;
	P0=NixieTable[x];
	Delay(5);				
	we2=1;
	
	we3=0;
	P0=NixieTable[y];	
	Delay(5);				
	we3=1;
	
	we4=0;
	P0=NixieTable[z];	
	Delay(5);				
	we4=1;
}

Press to get

#include <REGX52.H>
#include "Delay.h"

unsigned char Key()// Get the key value , Key shake elimination and release detection 
{
	unsigned char KeyNumber=0;
	
	if(P3_4==0){Delay(20);while(P3_4==0);Delay(20);KeyNumber=1;}// Positive rotation 
	if(P3_5==0){Delay(20);while(P3_5==0);Delay(20);KeyNumber=2;}// reverse 
	if(P3_6==0){Delay(20);while(P3_6==0);Delay(20);KeyNumber=3;}// Speed up 
	if(P3_7==0){Delay(20);while(P3_7==0);Delay(20);KeyNumber=4;}// Slow down 
	
	return KeyNumber;
}

Here it is explained that the partial simulation of triode is given by a senior , The seniors are still good