Touchless Wash Station

Published Dec 13, 2021

GPL-3.0-only

1 hours to build

Beginner

arduino

With the ravaging corona virus disease the need for touchless washing station is important, this will reduce contact to taps and reduce the transmission of the virus. To help provide this touchless system, Arcus Investment a startup company designed a touchless wash station, which ensures that one washes their hands thoroughly without touching the tap. We have used simple electronic components which are available at cheap cost to help cub the highly transmissible corona virus.

Components Used
AK9753 IR sensor AK9753 is a low power and compact IR (infrared) sensor module.	X 2
Red LED 5mm Standard LEDs - Through Hole Red Round	X 1
Diode 1N400x Diode 1N400x	X 1
12V Rechargeable Lithium Iron Battery LiFePO4 - Lithium Iron Phosphate Battery 12V 7.5Ah LiFePO4 5.95 x 2.56 x 3.70"	X 1
LM324 Quad Op Amps Operational Amplifiers - Op Amps Quad	X 1

Description

Video

How I build this project:

Step-1

Created a monostable circuit using a capacitor, resistor and operational amplifier, to act as trigger timer for 20seconds then go off. This 20seconds is the time the tap runs water making one to wash their hands thoroughly after the circuit is triggered.

Step-2

Designed a comparator that compares the state of IR sensor with the reference voltage then trigger transistors to switch on the motor. An astable circuit triggered by the IR sensor is what controls the monostable circuit.

Step-3

Created an indicator LED for showing that the circuit has been triggered to operate which is connected to the inverter circuit made up of operational amplifiers.