The base of the transistor is connected through a 1K resistor. The sensor was connected with the BD136 PNP transistor using jumper wire. I soldered the battery with the Li-ion charging module directly using jumper wires. An encloser for the circuit is designed according to the cap size and the file is attached. My selected one is a glass Horlicks container. For the sanitizer container, you can select any similar glass or plastic container, such as a plastic coffee storage container. Do NOT make it too sensitive because the pump might act spontaneously without any trigger!įor powering the circuit and the motor a 14500 Li-ion cell is used and it is connected with a USB charging circuit. Turn the potentiometer of the sensor from the lowest sensitivity level, and slightly increase it to achieve your desired detection range. It protects the transistor from burning out. A 1K resistor is connected between sensor OUT and the base of the transistor. I used the BD136 power transistor for the circuit. When it goes low it turns on the PNP transistor and the pump becomes on. IR proximity sensor detects the presence of a hand and makes the OUT pin LOW. The schematic is very simple and easy to understand. Obviously, the absence of a microcontroller removes control of over spilling, but using a smaller nozzle would physically limit the flow of liquid.īefore proceeding further you can watch the demo video: Possibly the easiest solution for this purpose is to use a simple transistor or MOSFET with an IR proximity sensor, which would also drastically reduce the costs. But my intention is to keep it simple and cheap so that anyone can replicate it. You can find several Arduino automated liquid dispensers circulating the web. In this tutorial, we will build an automatic hand sanitizer dispenser that uses IR sensors to detect the presence of a hand and activates a pump to pour the liquid on the hand. Touching alcohol containers or hand sanitizers with infected hands can spread the virus to the next person. In this current scenario of the global outbreak, it is advised by WHO (world health organization) to maintain HealthyHand Wash and Sanitation Habits, but the main problem is the way we do it, that is by physical touch. WHO has already announced it a Pandemic disease and many cities are under lockdown situations and changed our lifestyle. Almost every country is suffering from the Corona Virus. Power Saving Function: When using only one sort of water temperature between hot & cold, you can turn the other temperature switch off and save electric.Corona Virus (COVID-19) is wreaking havoc in the world.Water Level Control Function: Automatic water level control function ensures durablity of the filters & unit.įresh Water Supply: 4~12 of cold water and 70~90 of hot water are available at any time. Safety Functions for Hot Water Use: Anti-Superheating function of heater (by manual reset type of bi-metal) & automatic temperature control function (by automatic reset type of bi-metal) keep you safe from hot water. The continuous current used when the valve is turned off is 700mA. Hot Water Safety Button: An extra safety button can protect your children from unexpected accident with hot water. Firstly, Automatic Water Dispenser using Arduino 1, this project has a 12V valve with a current rating of 1.2A. Reverse Osmosis Filtration System: >0.5 μm Sediment Filter (filter larger particles and solid impurities), Pre-Carbon Filter (absorbs chlorine, mould), >0.001 μm RO Membrane (removes bacteria, viruses, heavy metals, pesticide residue), Alkaline Post Filter (regulates the taste of water and keeps the water fresh). Removable Water Faucets: Easily removable water faucets will be a hygiene guard to help keep hot & cold water faucets always clean. Eco Mode: The ECO sensor automatically stops water heating & chilling and save electric charge, when it notices that illuminance around the unit darkens at night.Ĭontinuous Water Dispensing Function: By this function, you can conveniently receive a large
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