Development of an automatic hand washing dispenser covid 19

The outbreak of coronavirus (COVID 19) has led to the death of over 400,000 all over globe and over 7 million of confirmed cases within five months and exact drug for immunization and cure has not been obtained but preventive measure can be taken. One of such preventive measures involved washing of hand regularly, especially in the public like schools, shopping centers, religion centers, offices, bankse.t.c need to have automatic hand washing dispenser. In this work a low cost automatic hand washing dispenser was developed. It consists of three containers with soap, water and sanitizer, horse, 12 V dc pump, proximity detector, Arduino board, multicolor LED indicator, and battery plus solar power source. All are housed inside metal rectangular box including washing metal steel basing. Arduino microcontroller is used to coordinate the activities, it monitors the three ultrasound wave that travel from the transmitter to the receiver and compute for distance for each ultrasonic sensor. Distance used in detecting the present of hand is 15 cm, any object closed to the sensor less than that distance its triggers soap or water or sanitizer pump and fluid flow at predetermine time. The soap and sanitizer flow for 100 ms and water for 1 s. The operating time is 2000 ms, i.e time taken when hands are placed under the sensors and discharging of fluids is2000 ms.