Difference between revisions of "Frameless Scale"
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[[File:Chesick2.jpg|thumb|600px|Parts Detail]] | [[File:Chesick2.jpg|thumb|600px|Parts Detail]] | ||
[[File:Chesick3.jpg|thumb|600px|Assembly]] | [[File:Chesick3.jpg|thumb|600px|Assembly]] | ||
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| + | ==Block Diagram== | ||
[[File:Chesick_block_diagram.jpg|thumb|600px|Block Diagram]] | [[File:Chesick_block_diagram.jpg|thumb|600px|Block Diagram]] | ||
[[File:HX711_with_terminals_and_Pi.jpg|thumb|600px|HX711 with screw terminals and metal shield installed connected to Pi]] | [[File:HX711_with_terminals_and_Pi.jpg|thumb|600px|HX711 with screw terminals and metal shield installed connected to Pi]] | ||
Revision as of 06:51, 7 October 2014
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.
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.
- All electrical connections are made with crimp plugs or terminal blocks.
Material List
A detailed Parts List with part numbers, suppliers and prices is available in pdf.
