SuperKitz.com Project Manual
Simple Automatic Hand Sanitizer Dispenser (No Arduino Needed) DIY Kit
Using IR Sensor and TIP 32 transistor.
In this current scenario of covid-19 global outbreak, personal hygiene has much importance in our day to day life. What happens if someone who is not affected by the disease touches the sanitizer used by an infected person. So here comes the solution for this.
In this project, we design a simple automatic hand sanitizer without using the Arduino Board. By reducing this physical contact we can avoid virus up to an extent and keep virus spreading around us.
Requirements :
● Superkitz Simple Automatic Hand Sanitizer Dispenser (No Arduino Needed) DIY Kit.
Components
IR Proximity Sensor
1 nos
Submersible Mini Water Pump - 3-6V DC
1 nos
TIP 32C PNP Transistor
1 nos
Aquarium Tubing PVC D8mm 1mtr
1 nos
1KΩ Resistor
1 nos
micro USB socket
1 nos
Hardware
Unlike many Arduino automated liquid dispensers on the internet, I find using Arduino is a bit overkill for this specific project. Arduino’s are far too expensive. I figured using a simple transistor or MOSFET would do the job, which would also drastically reduce the costs. Obviously, the absence of a microcontroller removes control of over spilling, but then, I find out that using a smaller nozzle would physically limit the flow of liquid. There are several two-transistor RC circuits that would solve the over spilling problem but the single transistor design works well, given that you choose the proper nozzle size.
IR Proximity Sensor(Distance Measurement)
An IR sensor is an electronic sensor that measures and detects the infra-red light radiating from an object or its environment. An Infrared Light Emitting Diode emits light at a range of 700nm to 1mm. These infrared lights are not visible by naked eyes but can be seen through a camera. That is the reason why these IR sensors used in night vision cameras. When light falls on the IR sensor the photodiode response in terms of change in resistance. This change in resistance measured in terms of voltage.
A combination of IR LED and Photodiode used for proximity and color detection. An IR LED transmitter emits IR light, and the object reflects that light. The photodiode (receiver) receives the reflected light. The amount of reflection and reception varies with distance. These differences cause a change in the input and thus used for proximity detection.
Circuit Diagram
Wire up the Proximity module and Submersible Pump.
Soldering TIP32C Transister to Motor and IR module
Setting up the Container, Motor, Makeshift Nozzle.
Output
When the IR Sensor detects an obstruction it will activate transistor(TIP32) and run the submersible pump for a desired duration.
Setting up the Container, Motor, Makeshift Nozzle.