Difference between revisions of "Frameless Scale"

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(Goals:)
(Goals:)
Line 2: Line 2:
  
 
==Goals:==
 
==Goals:==
*Parts cost under $100.
+
*Parts cost under $100 and are readily available.
*Parts are readily available.
+
*Low thermal drift and creep.
 +
*Low power consumption.
 +
*Automatically resume operation after power failure.
 
*Can be built by 15 year old student (9th grader) using hand tools.
 
*Can be built by 15 year old student (9th grader) using hand tools.
 
*No soldering.
 
*No soldering.
*Low power consumption.
+
*No lethal voltages.
*Automatically resume operation after power failure.
 
*Low thermal drift and creep.
 
  
 
[[File:Chesick5.jpg|thumb|600px|End View with cover removed.]]
 
[[File:Chesick5.jpg|thumb|600px|End View with cover removed.]]

Revision as of 04:25, 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 resume 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 cover removed.

Design Features

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

Material List

Parts Detail
Assembly
HX711 with terminals and Pi