Halloween Fog Machine Modifications

Introduction

• End of October means Halloween is near.
• Discussion on fog machines, particularly modifying a cheap 400-watt model.

Original Fog Machine Overview

• Built a 4.5 kilowatt fog machine three years ago.
• Cheap 400-watt fogger purchased for modification.
• Components of the fog machine:
  • Small reservoir for fog liquid.
  • Pump to push liquid through a heating block.
  • Controller board for heat regulation and remote control.

Fog Liquid Composition

• Fog liquids typically contain glycerin and propylene glycol.
• Distilled water does not produce visible fog; it creates invisible steam.
• Importance of using food-grade or pharmaceutical-grade liquids to avoid impurities.

Testing with Different Liquids

1. Initial Test with Regular Fog Juice

   • 400-watt machine performs underwhelmingly with standard fog juice.

2. Testing Pure Glycerin

   • Thick and viscous; pump struggles.
   • Creates thick cloud, but machine jams and overheats.
   • Persistence in the room: over 30 minutes.

3. Testing with Propylene Glycol

   • Less viscous, pump operates smoothly.
   • Huge cloud produced but dissipates quickly (about 2 minutes).

4. 50/50 Mix of Glycerin and Propylene Glycol

   • Best compromise: thick clouds that last longer.
   • Similar to the base for e-liquids without nicotine.

Creating Concentrated Fog Liquid

• Mixed 1 liter of glycerin with 1 liter of propylene glycol.
• Added 10ml of strawberry perfume for scent.
• Resulting liquid tested outside shows significant improvement over regular fog juice.

Reasons for Commercial Fog Liquid Composition

• Queries why commercial fog liquids use more water.
  • Possible reasons: cost-effective, prevents toxic fumes.
  • Water may help clean tubing and prevent clogging.

Cleaning and Maintenance

• Machine can be cleaned with a vinegar solution (1 part vinegar, 1 part distilled water).
• Considerations on viscosity affecting pump lifespan.

Upgrading the Pump

• Replacing the stock 15-watt pump with a 48-watt vibration pump.
  • Achieves higher pressures, fits in larger machines easily.
  • Soldered connections and modified housing for new pump.

Heating Element Concerns

• Larger pumps lead to more fog production.
• Issues with heating block: need for larger thermal mass to sustain fog output.
• Experiment shows new setups produce more fog but have limitations.

Conclusion

• Experimental modifications can yield impressive results but come with risks.
• Advice to proceed with caution when trying modifications at home.

Final Thoughts

• Wishes for a happy Halloween, encourages safe experimentation.