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  • Rusznic commented on ShailzaP's instructable Make a Fridge 1 month ago
    Make a Fridge

    Hey,Instead of using Al plate you should try using small radiator that is the same size as the peltier. Some thermal paste would also help a lot. Also from my experience the small fan inside doesn't have to push air that fast, just enough to mix it and avoid condensation on the cold side.I intended to use styrofoam box that is used to move dry ice for such project. But I also planned adding thermostat controller and never came around designing whole circuit. Maybe the project will be back on my radar when it gets warmer lol.

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  • Safety Glasses: Removing Light Scratches

    I tried this and it was even worse! I think it depends on the type of toothpaste so look out for that.If you need to be sure about the results I recommend plexiglass polishing kits. They don't smell so minty tough ;)

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  • Rusznic commented on ianvanmourik's instructable OPEN SOURCE AIR PURIFIER4 months ago
    OPEN SOURCE AIR PURIFIER

    The design is very appealing though I would skip the arduino and sensor part completely and opt for constant filtration. More air can be moved this way and there is no way for sensor to detect all the types of gases and dust anyway.Moreover from my experience with air filters (I worked in research institute researching military vehicle filters and gas-masks) using activated carbon in this application is kind of pointless. They get used up very quickly (less than a day) and literally soak up stuff from the air passively with water and humidity affecting them. You'll see them used in gas masks to filter out noxious gasses but the lifetime of those filters is about 2 hours!A tubular HEPA filter or commercial paper filter would be a very good choice here. They have standard sizes and would...see more »The design is very appealing though I would skip the arduino and sensor part completely and opt for constant filtration. More air can be moved this way and there is no way for sensor to detect all the types of gases and dust anyway.Moreover from my experience with air filters (I worked in research institute researching military vehicle filters and gas-masks) using activated carbon in this application is kind of pointless. They get used up very quickly (less than a day) and literally soak up stuff from the air passively with water and humidity affecting them. You'll see them used in gas masks to filter out noxious gasses but the lifetime of those filters is about 2 hours!A tubular HEPA filter or commercial paper filter would be a very good choice here. They have standard sizes and would fit very well inside this design. Such filters range from good to bad obviously but the best ones give great airflow with removing near all impurities from air (To qualify as HEPA by US government standards, an air filter must remove (from the air that passes through) 99.97% of particles that have a size of 0.3 um.)

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