Password lock with only one button switch using Arduino

Electronic locks with password always had a keyboard for inserting the code, but following lock used only one button switch.
The code must inserts by pressing the button switch 5 times but with certain delay between each pressing, as you can see in programming code i sets this delay time 1 second delay between four first codes and 5 seconds for two last codes, you can change this code by changing that delay times in programming code.
After inserting the correct code the load that connected to pin10 runs for 3 seconds, you can change this delay time in code.
If an incorrect code inserts, the red LED turns ON also for 3 seconds.
Last important note is the "tolerance" stage in programming code, i sets it on 0.4, that means the delay time between each two pressed buttons acceptable 40% more or lower than the delay time that you write it in the programming code, so 600 to 1400 milliseconds can accepted rather than 1000 milliseconds, or 3000 to 7000 milliseconds can accepted rather than 5000 milliseconds.(the "tolerance" is very important because you never can press the button exactly 5000 milliseconds or exactly 1000 milliseconds).

Password lock with only one button switch using Arduino

Password lock with only one button switch using Arduino
Password lock with only one button switch using Arduino
Password lock with only one button switch using Arduino

Password lock with only one button switch using Arduino




int count=0;
unsigned long a[]={0,0,0,0,0};
unsigned long b[]={0,0,0,0,0};
unsigned long del[]={1000,1000,1000,5000};

float tolerance=.4;

void setup()
{
  pinMode(2, INPUT);
  pinMode(10, OUTPUT);
  pinMode(13, OUTPUT);
}

void dataCapture()
{
  a[count]=millis();
  delay(500); // for button debounce, your value may differ
  count++;
}

void checkCombination()
{
    int compare=0;
    count=0;
    // calcualate delays between keypresses
    b[0]=a[1]-a[0];
    b[1]=a[2]-a[1];
    b[2]=a[3]-a[2];
    b[3]=a[4]-a[3];

    // compare the button delay values
    if (b[0]<=(del[0]*(1+tolerance)) && b[0]>=(del[0]*(1-tolerance))) { compare++; }
    if (b[1]<=(del[1]*(1+tolerance)) && b[1]>=(del[1]*(1-tolerance))) { compare++; }   
    if (b[2]<=(del[2]*(1+tolerance)) && b[2]>=(del[2]*(1-tolerance))) { compare++; }
    if (b[3]<=(del[3]*(1+tolerance)) && b[3]>=(del[3]*(1-tolerance))) { compare++; }
    if (compare==4) { digitalWrite(10,HIGH); }
    delay(3000);
    digitalWrite(10,LOW);
    if (compare!=4) { digitalWrite(13,HIGH); }
    delay(3000);
    digitalWrite(13,LOW);
   
   
}

void loop()
{
  if (digitalRead(2)==HIGH)
  {
    dataCapture();
  }
  if (count>4)
  {
    checkCombination();
  }
}
Location: United States

Comments

Post a Comment

Popular posts from this blog

A2XWY; A2XFY Cables meaning; XLPE cables advantages over PVC cables

Technical Specification of Aluminum Cables in terms of codes So many times you have seen coding while specifying cables technical such as A2XWY now what does this means. Now there is nomenclature for the same which is used while describing the same. Where A -  Aluminium 2X- XLPE Insulation W – Steel round wire armour F- Steel Strip Armour WW- Double Steel round Armour FF- Double Steel Strip Armour Y- PVC outer Sheath Wa- Non Magnetic round wire Armour Fa- Non Magnetic Strip Armour AW- Aluminum Wire Armour Now As per A2XWY – This describes that it is Aluminum cable, XLPE insulated, With Steel round wire armour and having PVC outer Sheath. This coding is as per IS 7098(Part1):1988. You have also seen that there is coding for copper so there is no coding required in case of copper cables. XLPE cables advantages over PVC cables/ Thermoplastic cables:- 1.       XLPE cables have higher Power rating about 1.2 times PVC cables 2.       XLP...
Read more

Digital Multimeter working principle; DMM working

Image
Digital multimeters are most widely used in every industry as it used for measurement of Voltage, Current, Resistance, Capacitance and various other parameters. DMMs have been available for very several years. Yet it is still challenging to locate advice about how a digital multimeter works. The operation of a digital multimeter is comparatively uncomplicated, although there are obviously differences in how digital mulimeters work if they're from different makers.Despite this, there are several similarities and some general principles of how digital multimeters work. Fundamentals of how a DMM functions The key process occurring within a digital multimeter for any measurement is that of voltage measurement. All other measurements are derived from this basic measurement. So the best technique for understanding how a digital multimeter functions is in understanding this procedure. There are many kinds to digital converter, ADC. Nonetheless the one that is most widely used DMMs in di...
Read more

Wireless voltmeter using Arduino and RF 433MHz receiver and transmitter

Image
In this project i showed you how to make a wireless voltmeter using arduino and RF 433MHz receiver and transmitter. You can use this code and concept for many other projects, any project which used sensor with analog voltage output to sense temperature, gas leakage or light , etc. For example you can put a LM35 temperature sensor rather than potantiometer, you just have to putting its formula which convert LM35 output pin voltage to exact temperature. You also can make a wireless AC or DC power meter by doing some change in code and hardware (using hall effect current sensor and single phase voltage sensor). This type of RF module has distance range up to 200 meters according to datasheet but when i bought this RF module from Aliexpress its distance rang was very low, but i set its adjustable RF coil very carefully and i get very higher distance rang.(Don't play with RF coil if your module works good), You also have to use a 6 inch antenna to increase distance range to max as possi...
Read more