Touch controlled buzzer (Nodemcu ESP8266)

Hi Readers,

Today I would like to show you DIY doorbell or just hand controlled annoying buzzer.

What you need:

1. Cheap buzzer which cost about 1-3 euro.
2. Touch sensor another 3 euro
3. Cables
4. Nodemcu or any arduino board

 

 

Connections

 

Fritzing project I have added to GetToKnowTheBob git repository

 

 

Source code (PlatformIO & Arduino)

int returnValue = 0;

void setup() {
Serial.begin(115200);
pinMode(2, INPUT);
pinMode(4, OUTPUT);
delay(1000);
}

void loop() {
returnValue = analogRead(2);
Serial.println(“Sensor value: ” + String(returnValue));
delay(100);
if(returnValue > 500)
analogWrite(4,1);
else
analogWrite(4,0);
}

 

 

 

Complete project

 

This example is very practical. You can simply use it to other sensors. I have used it also with Passive infrared sensor – motion detector.

 

This post is initial post for future projects I will publish on GetToKnowTheBob blog.

Have fun!

 

 

Github repository: https://goo.gl/ii9xsz

Be positive and stay calm!

Cheers,

Radek