PIRA: 7A10.00


 Lab Equipment  Directions
  1.  Radio or tape player with tape
  2. LED or plexiglass plate
  3. thermopile on plexiglass plate
  4. amplifier speaker box
  5. remote
  6. lumirod
  7. 9V battery
  1.  Connect equipment as shown. Preset radio on a station or put audio tape in tape player.
  2. Align the LED and photocell as shown.
  3. Listen for sound on amplifier speaker.
  4. Move the thermopile back and forth and hear the signal come and go.
  1. Hold the speaker and thermopile in line with a remote, press a button, and hear its signal.
  2. Use the lumirod to carry the light signal from the LED to the thermopile.