Biological Warfare: Precision Anti-Mold Automation

Mold growth—specifically from the Zygomycetes class—is a persistent threat in older structures, thriving in pockets where humidity exceeds 65%. The Zygomycetes Killer is a proactive engineering solution that detects localized humidity spikes and deploys heat-based elimination tactics using a coordinated sensor-actuator array.

Detection and Human Feedback

The device maintains a rigorous monitoring loop to detect the specific environmental triggers for mold germination:

1. Atmospheric Polling: A DHT11 sensor constantly reads the ambient temperature and relative humidity.
2. Live Visualization: Data is pushed to an 16x2 Alphanumeric LCD. A 10k Potentiometer allows the user to adjust the backlighting contrast for visibility in dark basements or behind-the-wall maintenance areas.
3. Critical Thresholding: The software is hard-coded to recognize the 65% Humidity danger zone. Once this threshold is crossed, the device shifts from "Passive Monitoring" to "Active Elimination."

The Elimination Sequence: Relay and Servo Coordination

To effectively dry the mold-prone area, the device uses a unique dual-stage actuation system:

• Stage 1 - Power Switching: The Arduino triggers a High-Voltage Relay, which closes a secondary 24V circuit. This circuit powers a high-wattage heating element.
• Stage 2 - Targeted Distribution: The heater is mounted onto an SG90 Micro-servo motor. As the heat rises, the servo executes a 180-degree scanning motion, "sweeping" the warm air across the surface of the wall. This ensures even drying and prevents the heat from damaging the paint or structure in a single spot.

Sustainable Home Maintenance

The Zygomycetes Killer represents a shift from reactive chemical treatments to proactive digital maintenance. By targeting the physical causes of mold (stagnant, moist air) at the exact moment they occur, homeowners can protect their structural integrity and indoor air quality without constant manual intervention.

this project was born for a school project to solve a problem.

The problem that affects our homes, especially the old ones is the mold, we all have a wall in the house with mold, to solve this problem we have created an anti-mold device that lowers the humidity when the sensor feels that it gets up too.

this project work in this way, first of all the dht11(http://robocraft.ru/files/datasheet/DHT11.pdf) read the temperature and the humidity, the arduino genuino uno write them on the LCD (https://components101.com/16x2-lcd-pinout-datasheet), where we can control the contrast with the potentiometer (https://components101.com/potentiometer).

If the humidity is higher than 65% the relay turn on, and close the 24v circuit where there is the heater(which is glued over the servo) that starts to warm up, Simultaneously the servo (https://components101.com/servo-motor-basics-pinout-datasheet) begins to rotate within a 180-degree radius back and forth until the humidity drops below 65%.

Here there are three pictures of our project:

in this video we have simulated a raising humidity blowing on the sensor and we saw what happened.