Posts with «buzzer» label

Otto - build you own robot in two hours!

Primary image

What does it do?

Otto walks, dances, makes sounds and avoids obstacles, is completely open source, Arduino compatible, 3D printable, and with a social impact mission to create an inclusive environment for all kids.

Otto was inspired by another robot instructable BoB the BiPed and programmed using code from another open source biped robot called Zowi.

CC-BY-SA

Otto's differences are in the assembled size (11cm x 7cm x12cm), cleaner integration of components and expressions.

Cost to build

$49, 00

Embedded video

Finished project

Complete

Number

Time to build

2 hours

Type

URL to more information

Weight

250 grams

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Grove Water Sensor


Connecting a water sensor to an Arduino is a great way to detect a leak, spill, flood, rain etc. It can be used to detect the presence, level, volume and/or the absence of water. While this could be used to remind you to water your plants, there is a better Grove sensor for that. The sensor has an array of exposed traces which will read LOW when water is detected. In this tutorial, we will connect the Water Sensor to Digital Pin 8 on the Arduino, and will enlist the very handy Grove Piezo buzzer and an LED to help identify when the Water sensor comes into contact with a source of water.


 

Parts Required:

Putting it together


If you have a Grove Base Shield, you just have to connect the Grove Water Sensor to D8 on the shield, and the Buzzer to D12 on the Shield. My Grove base shield obstructs the onboard LED, so I will attach an LED to Digital pin 13. If you do not have a Grove base shield, then you should connect the Sensors as described in the tables below:
 


 

Arduino Sketch


 
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/* 
  Grove Water Sensor sketch 
     Written by ScottC 5th August 2014
     Arduino IDE version 1.0.5
     Website: http://arduinobasics.blogspot.com
     Description: Use Grove Water Sensor to detect leaks, floods, spills, rain etc.
     Credits: This sketch was inspired by this website:
              http://www.seeedstudio.com/wiki/Grove_-_Water_Sensor     
 ------------------------------------------------------------- */
#define Grove_Water_Sensor 8     //Attach Water sensor to Arduino Digital Pin 8
#define Grove_Piezo_Buzzer 12    //Attach Piezo Buzzer to Arduino Digital Pin 12
#define LED 13                   //Attach an LED to Digital Pin 13 (or use onboard LED)
void setup(){
pinMode(Grove_Water_Sensor, INPUT); //The Water Sensor is an Input
pinMode(Grove_Piezo_Buzzer, OUTPUT); //The Piezo Buzzer is an Output
        pinMode(LED, OUTPUT); //The LED is an Output
}

void loop(){
        /* The water sensor will switch LOW when water is detected.
           Get the Arduino to illuminate the LED and activate the buzzer
           when water is detected, and switch both off when no water is present */
if(digitalRead(Grove_Water_Sensor) == LOW){
                digitalWrite(LED,HIGH);
digitalWrite(Grove_Piezo_Buzzer, HIGH);
                delay(2);
                digitalWrite(Grove_Piezo_Buzzer, LOW);
                delay(40);
        }else{
                digitalWrite(Grove_Piezo_Buzzer, LOW);
                digitalWrite(LED,LOW);
        }
}


 

The Video


 


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ScottC 05 Aug 16:38

How to use a Tricolor LED and a Mini Buzzer


So I’ve made a little not-so-challenging game that uses a tricolor LED, mini buzzer, arduino and of course our Android device. The mechanics of the game is that you need to choose a color, red, green or blue from the Android app and then the accessory (arduino) will randomly pick a color after [...]