Tag Archives: Algebra

Dog Weight Scale part 6: Calculating the Dog’s Weight and Position

In my previous post I found the center of gravity of the top plywood circle of the Dog Bed Weight Scale. This post goes through the math of calculating the weight W on the scale and the position {X, Y} of that weight’s center of gravity. ┬áThat is, how much does our dog PIppa weigh when resting on the bed, and what is her position on the bed?

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Dog Weight Scale Part 4: Calibration and its difficulties

Calibrating the scale using exercise weights
Calibrating the scale using exercise weights

In my previous post I finished assembling the Dog Bed Weight Scale, at least enough to allow testing it. In this post, I relate how I calibrated and tested it.

Using the Bogde HX711 Load Cell Amplifier library and examples, and the Sparkfun HX711 Example Arduino Sketches, I quickly wrote a little Sketch to output the raw value from the scale (SCALE = 1.0 and OFFSET = 0L).  The library made talking to the HX711 trivial.

Continue reading Dog Weight Scale Part 4: Calibration and its difficulties