Casio Watch with Bluetooth (nrf52832) Part 4
11/5/2023The design was flawed from the start because I made some assumptions about the lcd display. Turns out, it is multiplexed, which requires an AC signal along with some finer voltage control rather than 1 and 0. The options are now to either find a ble SOC which also has LCD driving capabilities built ...
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Casio Watch with Bluetooth (nrf52832) Part 3
9/4/2023The new programmer arrived, along with the realization that they won't fix the problem. The issue was not only did I fry the last couple of processors with 5V signals (arduino UNO), but the factory new chips come with protection on the debug access port. This means the chip needs a programmer that c...
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Casio Watch with Bluetooth (nrf52832) Part 2
9/2/2023The PCB design I created in the last part had many issues which led me to do much research into high frequency designs. The book <b>Right the First Time</b> by Lee Ritchey was especially helpful in teaching what to consider when working with high speed designs, which I very much was because the ante...
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Casio Watch with Bluetooth (nrf52832) Part 1
7/17/2023After buying a watch I noticed I began using my phone less. Eventually, I figured out it was because I wasn't using it to check the time, which would lead to checking everything else. It was like that Portlandia episode where the main guy got stuck in a loop switching between his phone and other dev...
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Fluid Simulation
5/19/2022There are two primary ways of simulating fluid: the surface can be approximated via the wave equation across a 2d plane, or the water particles themselves along with the forces between them can be simulated. My first attempt at simulating the surface of water starts with a grid of scalars (integers)...
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Ray Marching
3/13/2022Ray marching is a technique for rendering signed distance fields (SDFs). A SDF is a way of defining if a given point is within a volume. In essence, a volume defined by a SDF is rendered through ray marching, and ray marching does this through detecting collisions between rays sent from the camera a...
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