Recent content by Kaycee92

  1. K

    Can a Peltier Work Against 315 Watts Heat Load? Graphs Inside!

    What precautions should I take when I use a peltier? Last thing I'd like to see is the entire system blowing up.
  2. K

    Can a Peltier Work Against 315 Watts Heat Load? Graphs Inside!

    I'm planning to work on a water cooling device for physiotherapy using a peltier. For this, I should be able to cool 500 g of water at a temperature of 35°C to 18° C. This gives me a heat load of 315 Watts if I take time to be 3 mins. Is it possible for a peltier to work against such a...
  3. K

    Optics - Spectacles lens Power Estimation

    Maybe we can instruct the user to place the object and the camera at some fixed distance. This might help in getting an accurate reading. I'll go through that adaptive optics page and get back to you. Thanks a lot! :)
  4. K

    Optics - Spectacles lens Power Estimation

    Hi, I'm Chaitanya, 4th year undergraduate student in biomedical engg. I have an idea of making a mobile phone application which measures the power of your spectacle glasses. The idea is we take an image with the phone's inbuilt camera. One of the spectacle lens will be held in front of the...
  5. K

    Make a Mechanical Timer: Spring vs Counterweight

    Hi, I am thinking of making a mechanical timer to control a pedestal fan. I want do a completely mechanical one, just for the feel of it. For the energy storage method, I have two options, either a spiral spring or a counterweight. Which one should I use? Any good reading material on this...
  6. K

    How Can I Build a Timer Switch for My Mosquito Repellant?

    Thanks! I'll see what I can do. :)
  7. K

    How Can I Build a Timer Switch for My Mosquito Repellant?

    Hi, I'd like to do a small design project. When I sleep, I switch on my mosquito repellant for about 8 hours. Sometimes I forget switching it off too. Such long durations are little poisonous and generally not required. What I plan to do is to make a timer with a dial from 0 min to 60 min...
  8. K

    Calculating Drag Force due to air on a Pedestal Fan blade

    Any idea about drag force, Russ?
  9. K

    Calculating Drag Force due to air on a Pedestal Fan blade

    Yes, but that would give me the power consumed at some constant fan speed( during operation). When my flywheel is engaged, the rpm keeps on reducing and is a function of time. If I know how the drag force is related to angular velocity and how much torque is generated, I would then be able to...
  10. K

    Calculating Drag Force due to air on a Pedestal Fan blade

    I am doing a project where in a pedestal fan is alternatively powered using a flywheel. The flywheel is brought to some initial angular velocity by the electric motor. Now, if the power goes off, the fan blades would be coupled to the flywheel and it continues to rotate for the next 10 minutes...
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