How to make Arduino Wash Timer?

Ali Kaan Ünal
Apr 11, 2020
1 min read

Nowadays, we must wash our hands very well for our health. Experts recommend washing our hands with soap for at least 20 seconds. We made a wash timer with Arduino to show us this time period.

Diagram

Codes

#include <LiquidCrystal.h> LiquidCrystal lcd(12,11,5,4,3,2); #define trigpin 8 #define echopin 9 int range; int time; byte tap[8] = { B11100, B01000, B11100, B00100, B00010, B01100, B00010, B00100 }; byte status[8] = { B11111, B11111, B11111, B11111, B11111, B11111, B11111, B11111 }; byte okey[8] = { B01110, B01010, B01110, B00000, B00000, B01010, B01100, B01010 }; void setup(){ pinMode(trigpin, OUTPUT); pinMode(echopin, INPUT); lcd.createChar(0, tap); lcd.createChar(1, status); lcd.createChar(2, okey); lcd.begin(16,2); lcd.setCursor(0,0); lcd.print("Show Your Hands"); lcd.setCursor(3,1); lcd.print("For Start"); } void loop(){ digitalWrite(trigpin, HIGH); delayMicroseconds(1000); digitalWrite(trigpin, LOW); time = pulseIn(echopin, HIGH); range = (time/2) / 28.3; if(range>=10&&range<=30){ Rubbing(); } } void Rubbing(){ lcd.clear(); lcd.setCursor(0,0); lcd.write(byte(0)); lcd.setCursor(0,1); lcd.write("Keep Rub Ur Hand"); for(int i=1; i<=14 ; i++){ lcd.setCursor(i,0); lcd.write(byte(1)); delay(1430); } lcd.setCursor(15,0); lcd.write(byte(2)); lcd.setCursor(0,1); lcd.write(" Good Job! "); delay(10000); lcd.setCursor(0,0); lcd.print("Show Your Hands"); lcd.setCursor(0,1); lcd.print(" For Start "); }