This project creates a device that automatically pumps sanitizer when you place your hand near it—no touching needed! It uses an infrared (IR) sensor to detect your hand and a small motor to pump the sanitizer out.
Key Components and Technology
- IC-LM358-(1)
- Transistor TIP 32C-(1)
- 5v Submersible motor-(1)
- Variable Resistor-10KΩ-(1)
- IR Reciever-(1)
- IR Transmitter-(1)
- Resistor-10KΩ-(1) & 100Ω-(1)
- 9v Battery-(1)
- Battery clip
- Connecting wires
- Zero PCB
- Plastic bottle
Circuit
How It Works
- The IR transmitter constantly sends invisible infrared light out.
- When you place your hand near the dispenser, this light reflects back and is detected by the IR receiver.
- The receiver sends a signal to the LM358 chip, which processes it and turns on the transistor.
- The transistor powers the motor that pumps sanitizer from the bottle.
- When you remove your hand, the sensor stops detecting reflected IR light, turning off the motor.
This simple circuit provides a reliable and essential touchless solution for home or small office use, emphasizing hygiene and reducing contact points.
Watch the full video tutorial here: Automatic Hand Sanitizer Dispenser | Touchless hand sanitizer | DIY sanitizer dispenser at Home