Difference between revisions of "Frameless Scale"

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(Goals:)
Line 10: Line 10:
 
*No lethal voltages.
 
*No lethal voltages.
  
[[File:Chesick5.jpg|thumb|600px|End View with cover removed.]]
+
[[File:Chesick5.jpg|thumb|600px|End view with end cap closure strip removed.]]
  
 
==Design Features==
 
==Design Features==

Revision as of 18:03, 30 September 2014

Finished rails (load cell mounts). Two go under the hive, one on each side.

Goals:

  • Parts cost under $100 and are readily available.
  • Low thermal drift and creep.
  • Low power consumption.
  • Automatically resumes operation after power failure.
  • Can be built by 15 year old student (9th grader) using hand tools.
  • No soldering.
  • No lethal voltages.
End view with end cap closure strip removed.

Design Features

  • No frame: no welding, no bending.
  • Load cells are mounted in metal strut readily available from electrical or industrial suppliers in aluminum. galvanized or painted steel.
  • Only straight cuts and drilled holes.
  • Electrical connections are plugs or terminal blocks.
Exploded parts diagram.

Material List

Parts Detail
Assembly
HX711 with screw terminals and metal shield installed connected to Pi