Woodworker Shop Vac With Arduino Uno

1/* ===========================================================
2
3SHOP  VAC AUTOMATION
4
5->>   CONNECT RELAYS IN TO DIGITAL OUTPUT 02 + VCC + GROUND
6      RELAY INTERRUPTS SHOP VAC POWER CORD 
7->>   CONNECT ACS712 30A TO ANALOG  INPUT A0 + VCC + GROUND
8      ACS712 MUST SENSE ON THE MAIN FUSE BOX
9==============================================================*/
10const  int analogIn = A0;
11int mVperAmp = 66; // use 185 for 5A, 100 for 20A Module and  66 for 30A Module
12int RawValue= 0;
13int ACSoffset = 2500; 
14double Voltage  = 0;
15double Amps = 0;
16
17const int pinRelay = 2;
18
19
20double Amps1  = 0;
21double Amps2 = 0;
22double Amps3 = 0;
23double Amps4 = 0;
24double Amps5  = 0;
25
26
27void setup(){ 
28 Serial.begin(9600);
29 pinMode (pinRelay, OUTPUT);
30}
31
32void  loop(){
33 
34 RawValue = analogRead(analogIn);
35 Voltage = (RawValue / 1024.0)  * 5000; // Gets you mV
36 Amps1 = abs((Voltage - ACSoffset) / mVperAmp);
37
38  Amps5 = Amps4; // that's just for the timing to turn off, aproximately 20 sec.
39  Amps4 = Amps3;
40 Amps3 = Amps2;
41 Amps2 = Amps1;
42 Amps = max(Amps1, Amps2);
43  Amps = max(Amps, Amps3);
44 Amps = max(Amps, Amps4);
45 Amps = max(Amps, Amps5);
46
47  Serial.print("Raw Value = " ); // shows pre-scaled value 
48 Serial.print(RawValue);  
49 Serial.print("\	 mV = "); // shows the voltage measured 
50 Serial.print(Voltage,2);  // the '2' after voltage allows you to display 3 digits after decimal point
51  Serial.print("\	 Amps = "); // shows the voltage measured 
52 Serial.print(Amps,2);  // the '2' after voltage allows you to display 3 digits after decimal point
53
54
55  if ( Amps > 6.8 ) // change value here whit the value of the machine you want to  use for ( for more than one, use the lower value)
56 {    digitalWrite( pinRelay,  HIGH);  //  over 6.8 Amp activates the relay
57      Serial.println(" High");
58      delay (5000);     // wait 5 seconds
59 }      
60
61if ( Amps < 6.8 )
62  {digitalWrite( pinRelay, LOW); // under 6.8 Amp the relay turns off
63  Serial.println("  Low");
64  }
65 delay(500); 
66}
67

1/* ===========================================================
2
3SHOP   VAC AUTOMATION
4
5->>   CONNECT RELAYS IN TO DIGITAL OUTPUT 02 + VCC + GROUND
6       RELAY INTERRUPTS SHOP VAC POWER CORD 
7->>   CONNECT ACS712 30A TO ANALOG   INPUT A0 + VCC + GROUND
8      ACS712 MUST SENSE ON THE MAIN FUSE BOX
9==============================================================*/
10const   int analogIn = A0;
11int mVperAmp = 66; // use 185 for 5A, 100 for 20A Module and   66 for 30A Module
12int RawValue= 0;
13int ACSoffset = 2500; 
14double Voltage   = 0;
15double Amps = 0;
16
17const int pinRelay = 2;
18
19
20double Amps1   = 0;
21double Amps2 = 0;
22double Amps3 = 0;
23double Amps4 = 0;
24double Amps5   = 0;
25
26
27void setup(){ 
28 Serial.begin(9600);
29 pinMode (pinRelay, OUTPUT);
30}
31
32void   loop(){
33 
34 RawValue = analogRead(analogIn);
35 Voltage = (RawValue / 1024.0)   * 5000; // Gets you mV
36 Amps1 = abs((Voltage - ACSoffset) / mVperAmp);
37
38   Amps5 = Amps4; // that's just for the timing to turn off, aproximately 20 sec.
39   Amps4 = Amps3;
40 Amps3 = Amps2;
41 Amps2 = Amps1;
42 Amps = max(Amps1, Amps2);
43   Amps = max(Amps, Amps3);
44 Amps = max(Amps, Amps4);
45 Amps = max(Amps, Amps5);
46
47   Serial.print("Raw Value = " ); // shows pre-scaled value 
48 Serial.print(RawValue);   
49 Serial.print("\	 mV = "); // shows the voltage measured 
50 Serial.print(Voltage,2);   // the '2' after voltage allows you to display 3 digits after decimal point
51   Serial.print("\	 Amps = "); // shows the voltage measured 
52 Serial.print(Amps,2);   // the '2' after voltage allows you to display 3 digits after decimal point
53
54
55   if ( Amps > 6.8 ) // change value here whit the value of the machine you want to   use for ( for more than one, use the lower value)
56 {    digitalWrite( pinRelay,   HIGH);  //  over 6.8 Amp activates the relay
57      Serial.println(" High");
58       delay (5000);     // wait 5 seconds
59 }      
60
61if ( Amps < 6.8 )
62   {digitalWrite( pinRelay, LOW); // under 6.8 Amp the relay turns off
63  Serial.println("   Low");
64  }
65 delay(500); 
66}
67