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  • OpenWave

OpenWave #8: Calculating significant wave height

Shane Ormonde3 years ago3 years ago06 mins

There are multiple ways of calculating significant wave height (Hs). According to wikipedia, the original definition was the average of the highest 3rd of waves. What this means is you would measure wave heights(trough to crest) for a set period, order that dataset from lowest to highest, take the top 3rd of the values and…

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  • Microcontrollers

Using the HC-06/HC-05 Bluetooth Adapter For Serial Communication With Linux

Shane Ormonde4 years ago3 years ago04 mins

For many applications, sending serial data from a microcontroller to a computer is easily achieved using one of these serial to USB adapters: For a recent project the microcontroller in question was mounted on a rotating arm so using a normal wired usb to serial adapter was out of the question. Here is a short…

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  • OpenWave
  • Uncategorized

OpenWave #7 : Displacement measurement results – peak detect vs zero crossing

Shane Ormonde4 years ago1 month ago42 mins

This post will detail an experiment in which the wave sensor was attached to a rotating arm at three different diameters. These diameters were 40cm, 60cm and 80cm. For each diameter, measurements were taken at two speeds to get an idea of how rotation frequency affects measurement accuracy. This gives a total of 6 sets…

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  • OpenWave

OpenWave #6 : Getting vertical displacement working

Shane Ormonde4 years ago3 years ago04 mins

Post #5 outlined the steps used to go from vertical acceleration to vertical displacement and how the results were completely off. The reason why each of the displacement graphs at the end of the post look so totally different just by changing the integral reset points is because of a negative offset to the velocity…

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  1. Mikhail Grushinskiy on OpenWave : Development of an Open-Source and Low-cost wave sensorMarch 6, 2023

    I’ve wrote something similar: Estimating wave height from IMU accelerometer on a moving boat https://bareboat-necessities.github.io/my-bareboat/bareboat-math.html code: https://github.com/bareboat-necessities/wave_height_from_IMU

  2. Artsy on Laser cut carboard planetary gearJanuary 30, 2023

    I absolutely love this! Thank you for making this video and sharing your file. I will be making projects with…

  3. Raffi on Matchbox Car v2 (fail)December 11, 2022

    You could just resolder another ATtiny? Cool Blog, thanks for putting your stuff out there!

  4. irfan on atmega16u2 virtual serial example using LUFA LibraryMay 28, 2021

    this device is used for what

  5. wattnotions on OpenWave : Development of an Open-Source and Low-cost wave sensorFebruary 28, 2021

    Hi Alex, Once I had the vertical acceleration to displacement script working, I could use it on any set of…

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