DIY Sanitation Disinfection Tunnel Circuit
Learn to build a DIY sanitation disinfection tunnel circuit for hand and body sanitization using sensors, relays, and spray mechanisms. Step-by-step tutorial included.
What Is a Sanitation Disinfection Tunnel?
A sanitation disinfection tunnel is a walking or entry tunnel that has disinfectant sprays installed, such that people or things are automatically sanitized. It assists in minimizing on-surface contamination and airborne pathogens, thereby making the surroundings safer.
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An innovative project is a DIY Sanitation Disinfection Tunnel Circuit, which is proposed to increase the level of hygiene by automatically disinfecting people or objects that pass through a tunnel. Such tunnels gained popularity, especially when there was a health crisis, to curb the transmission of germs and viruses.
This is a self-built project that involves motion sensors that are used to energize a relay that operates a pump to spray disinfectant solution. The system may have variable timing, uniform spray cover nozzles, and a mechanism to prevent saturation as well as exposure to chemicals. In constructing a DIY sanitation disinfection tunnel circuit, you will not only learn to make a practical solution to sanitize, but also get an opportunity to learn other practical electronics, such as sensors, relays, and timer circuits. The project is applicable in schools, offices, and other public places and workshops where hygiene is paramount.
Why Build a DIY Sanitation Tunnel Circuit?
- Cost-Effective: Less expensive than commercial units.
- Customizable: Adjust spray duration, timer, and nozzle placement.
- Hands-Free Operation: Reduces human contact with potentially contaminated surfaces.
- Educational: Learn about sensors, relays, timers, and fluid mechanics.
- Portable Design: Can be installed in offices, entrances, or event venues.
Components Required for DIY Disinfection Tunnel
| Component | Quantity | Purpose |
|---|---|---|
| IR or Ultrasonic Sensor | 1β2 | Detect human presence |
| Relay Module (5V or 12V) | 1 | Switch disinfectant pump |
| DC Pump / Solenoid Valve | 1 | Dispenses disinfectant |
| Timer IC (555 or microcontroller) | 1 | Control spray duration |
| Power Supply (12V/24V) | 1 | Power sensors, pump, and circuit |
| Spray Nozzles | 4β6 | Uniform disinfectant coverage |
| Resistors & Capacitors | As needed | Sensor and timer circuit |
| Tubing & Container | 1 | Holds and delivers disinfectant |
| Enclosure / Frame | 1 | Tunnel structure |
| LED Indicators | Optional | Status indication |
Working Principle of the Disinfection Tunnel Circuit
- Detection Stage: Sensors detect a person or object entering the tunnel.
- Activation Stage: Sensor output triggers a relay connected to the pump.
- Disinfection Stage: Pump sprays disinfectant through nozzles for preset duration.
- Delay / Timer Control: Timer ensures controlled spray and prevents continuous operation.
- Safety and Reset: Circuit resets automatically for the next user.
Circuit Diagram Explanation
- Sensor Output β Connected to timer input or microcontroller pin.
- Timer / Controller β Sets spray duration (1β5 seconds typical).
- Relay Coil β Activated by timer to switch the pump ON.
- Pump β Dispenses disinfectant through multiple nozzles.
- Power Supply β Provides regulated DC voltage for sensor, relay, and pump.
Step-by-Step Construction Guide
- Build Tunnel Frame: Use PVC or lightweight metal for a walk-through frame.
- Install Nozzles: Place at shoulder and torso level for uniform coverage.
- Mount Sensors: Install IR or ultrasonic sensors at the entrance to detect individuals.
- Assemble Circuit: Connect sensors, relay, timer, and pump according to the diagram.
- Connect Power Supply: Ensure proper voltage and current rating for pump and relay.
- Test Spray Operation: Walk through the tunnel to verify detection and spray timing. Adjust timer and sensor sensitivity.
Safety Considerations
- Use non-toxic, approved disinfectants.
- Avoid over-saturating clothes or skin.
- Place the tunnel in a well-ventilated area.
- Ensure electrical connections are insulated and waterproof.
- Keep children and pets away during operation.
Applications of Disinfection Tunnel
- Hospital entrances
- Offices and schools
- Event venues and malls
- Factory and workshop entry points
- Public transportation hubs
Troubleshooting Tips
- Pump not activating β Check relay coil voltage and connections.
- Sensor not detecting β Adjust sensor distance or orientation.
- Continuous spray β Check timer circuit and relay reset.
- Uneven spray coverage β Reposition nozzles or increase number of nozzles.
- Low disinfectant flow β Check tubing, pump, and solution level.
Frequently Asked Questions - DIY Sanitation Disinfection Tunnel Circuit:
What is a DIY sanitation disinfection tunnel?
A walk-through tunnel that sprays disinfectant automatically using sensors and a pump.
Which sensors are suitable for detection?
IR sensors or ultrasonic sensors are commonly used to detect human presence.
How is the spray duration controlled?
Using a 555 timer or microcontroller to trigger the relay for a fixed duration.
What type of disinfectant should be used?
Non-toxic, water-based disinfectants approved for public use.
Can the circuit work with a 12V pump?
Yes, as long as the power supply matches the pump and relay voltage.
How many nozzles are recommended?
Typically 4β6 nozzles positioned for uniform coverage.
Is the tunnel safe for children?
Yes, if non-toxic disinfectant is used and electrical components are insulated.
Can the tunnel handle continuous use?
Yes, ensure pump and relay are rated for repeated cycles.
Can the timer duration be adjusted?
Yes, by changing the resistor/capacitor values in the 555 timer circuit.
Can multiple tunnels be connected to a single control circuit?
Yes, with proper relay ratings and power supply design.
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