Recent content by knatedogg86

  1. K

    How to work out mechanical energy used to stroke a key on a keyboard

    yea, that's what i was afraid of...so in conclusion, at the moment using piezo-electric materials isn't an effiecent enough way to harvest electrical power?
  2. K

    How to work out mechanical energy used to stroke a key on a keyboard

    Piezoelectric Project I am working on a project that will use piezoelectric ribbons printed on rubber underneath a laptop keyboard to charge its battery. The conversion rate of the ribbons from mechanical energy to electric energy is 80%. If I know the mechanical energy applied to the...
  3. K

    How to work out mechanical energy used to stroke a key on a keyboard

    Sorry to bother you again but i can't get my head around this project. If i know the mechanical energy applied to the ribbons will be say 1E-3 Joules and my laptop on average uses say about 80w and the specific piezoelectric ribbons are capible of converting 80% of mechanically energy into...
  4. K

    How to work out mechanical energy used to stroke a key on a keyboard

    Thanks, At the risk of sounding completely dense, where does the 10nt/kg come from??
  5. K

    How to work out mechanical energy used to stroke a key on a keyboard

    I am working on a project to use piezoelectric ribbons printed on rubber underneath a laptop keyboard to charge its battery. I have the conversion rate of the ribbons from mechanical energy to electric energy. I need to work out how much mechanical energy is used (and what is the formula) to...
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