OK, for the next arduino shield in the collection we look at the Multi-purpose Shield V2 from keyes, its not as advanced and feature rich as the v1.
The shield looks like this
Here are some of the features of the shield
6 LEDs which use pins D8 to D13
3 buttons which use A1, A2 and A3
Potentiometer for analog input connected to A0
Piezo buzzer connected to D3
4 digit display controlled by 2 74hc595’s
Pins A4,A5, D6 and D7 are available via a connector which means you can connect I2C devices to the shield and in the case of temperature sensors display the results on the display
I also think that there are too many LEDs on the board, 4 would have been more than enough instead of the 6 and a couple of other components could have been added
Parts List
The shield costs $8
| Name | link |
| Arduino Uno | |
| Multi-purpose Shield V2 | keyestudio Multi-purpose shield V2 for arduino starter |
Code Example
This is the default code example which shows various functionality
No buttons pressed – pot value is displayed on display
Button 1 pressed – value is displayed on 7 segment displays
Button 2 pressed – buzzer beeps
Button 3 pressed – leds light
//pressing nothing to display value of analog revolving potentiometer
//pressing key1 to show 0-3 on LED Segment Displays
//pressing key2 and buzzer ringing
//pressing key3 and flowing light on
//defining three pins of 74HC595
int latchPin = 4;//ST_CP
int clockPin = 5;//SH_CP
int dataPin = 2; //DS
//defining three key input
int key1 = A1;
int key2 = A2;
int key3 = A3;
//buzzer pin
int buzzer = 3;
//pin definition of flowing light
int led1 = 13;
int led2 = 12;
int led3 = 11;
int led4 = 10;
int led5 = 9;
int led6 = 8;
int dat_wei[4]={0x01,0x02,0x04,0x08}; //LED Segment Displays
//showing 1--4
int dat_duan[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90}; //LED Segment Displays showing 0--9
char i=0;
void setup ()
{
pinMode(latchPin,OUTPUT);
pinMode(clockPin,OUTPUT);
pinMode(dataPin,OUTPUT);
pinMode(key1,INPUT);
pinMode(key2,INPUT);
pinMode(key3,INPUT);
pinMode(buzzer,OUTPUT);
pinMode(led1,OUTPUT);
pinMode(led2,OUTPUT);
pinMode(led3,OUTPUT);
pinMode(led4,OUTPUT);
pinMode(led5,OUTPUT);
pinMode(led6,OUTPUT);
for(char i=8;i<14;i++)
digitalWrite(i,HIGH);
}
void loop()
{
if(digitalRead(key1)==LOW )
SMG(); //testing LED Segment Displays
if(digitalRead(key2)==LOW )
buzzer_(); //testing buzzer
if(digitalRead(key3)==LOW)
led_display(); //testing LED
if(digitalRead(key1)==HIGH & digitalRead(key2)==HIGH & digitalRead(key3)==HIGH)
analog(); //testing analog input
}
void SMG(void)
{
digitalWrite(latchPin,LOW); //clear LED Segment Displays
shiftOut(dataPin, clockPin, MSBFIRST ,0x00);
shiftOut(dataPin, clockPin, MSBFIRST ,0x00);
digitalWrite(latchPin,HIGH);
while(1)
{
digitalWrite(latchPin,LOW);
shiftOut(dataPin, clockPin, MSBFIRST ,dat_duan[i]); //data about second piece
shiftOut(dataPin, clockPin, MSBFIRST ,dat_wei[i]); //way of MSBFIRST,data about first piece
digitalWrite(latchPin,HIGH);
i++;
if(i==4){i=0;}
if(digitalRead(key1)==HIGH)
{
digitalWrite(latchPin,LOW); //clear LED Segment Displays
shiftOut(dataPin, clockPin, MSBFIRST ,0x00);
shiftOut(dataPin, clockPin, MSBFIRST ,0x00);
digitalWrite(latchPin,HIGH);
break;
}
}
}
void buzzer_(void)
{
char i;
digitalWrite(latchPin,LOW); //clear LED Segment Displays
shiftOut(dataPin, clockPin, MSBFIRST ,0x00);
shiftOut(dataPin, clockPin, MSBFIRST ,0x00);
digitalWrite(latchPin,HIGH);
while(1)
{
for(i=0;i<80;i++)// output a frequency sound
{
digitalWrite(buzzer,LOW);// sound
delay(1);//delay1ms
digitalWrite(buzzer,HIGH);//not sound
delay(1);//ms delay
}
for(i=0;i<100;i++)// output a frequency sound
{
digitalWrite(buzzer,LOW);// sound
digitalWrite(buzzer,HIGH);//not sound
delay(2);//2ms delay
}
if(digitalRead(key2)==HIGH)
{
digitalWrite(latchPin,LOW); //clear LED Segment Displays
shiftOut(dataPin, clockPin, MSBFIRST ,0x00);
shiftOut(dataPin, clockPin, MSBFIRST ,0x00);
digitalWrite(latchPin,HIGH);
break;
}
}
}
void led_display()
{
digitalWrite(latchPin,LOW); //clear LED Segment Displays
shiftOut(dataPin, clockPin, MSBFIRST ,0x00);
shiftOut(dataPin, clockPin, MSBFIRST ,0x00);
digitalWrite(latchPin,HIGH);
while(1)
{
digitalWrite(led1,LOW);
delay(100);
digitalWrite(led1,HIGH);
digitalWrite(led2,LOW);
delay(100);
digitalWrite(led2,HIGH);
digitalWrite(led3,LOW);
delay(100);
digitalWrite(led3,HIGH);
digitalWrite(led4,LOW);
delay(100);
digitalWrite(led4,HIGH);
digitalWrite(led5,LOW);
delay(100);
digitalWrite(led5,HIGH);
digitalWrite(led6,LOW);
delay(100);
digitalWrite(led6,HIGH);
if(digitalRead(key3)==HIGH)
{
break;
}
}
}
void analog()
{
int val,qian,bai,shi,ge;
val=analogRead(A0);
qian=val/1000;
bai=val%1000;
bai=bai/100;
shi=val%100;
shi=shi/10;
ge=val%10;
digitalWrite(latchPin,LOW);
shiftOut(dataPin, clockPin, MSBFIRST ,dat_duan[qian]);
shiftOut(dataPin, clockPin, MSBFIRST ,0x01);
digitalWrite(latchPin,HIGH);
digitalWrite(latchPin,LOW);
shiftOut(dataPin, clockPin, MSBFIRST ,dat_duan[bai]);
shiftOut(dataPin, clockPin, MSBFIRST ,0x02);
digitalWrite(latchPin,HIGH);
digitalWrite(latchPin,LOW);
shiftOut(dataPin, clockPin, MSBFIRST ,dat_duan[shi]);
shiftOut(dataPin, clockPin, MSBFIRST ,0x04);
digitalWrite(latchPin,HIGH);
digitalWrite(latchPin,LOW);
shiftOut(dataPin, clockPin, MSBFIRST ,dat_duan[ge]);
shiftOut(dataPin, clockPin, MSBFIRST ,0x08);
digitalWrite(latchPin,HIGH);
}
