[Phillip]’s project is not just great for learning new words, it also shows just how complex natural systems can be.
As we know from news around the word, reefs are delicate systems prone to damage from just about any imaginable threat. Escaped aquarium fish, sunscreen, and the wayward feet of well meaning tourists to name a few. So it’s no wonder that aquarium hobbyists sometimes go to incredible lengths to simulate the natural environments these creatures live in.
While [Phillip] is still tinkering with his designs for this project, we found the data he included really interesting. His goal is to be able to plug in any coordinate on the earth and have the lights replicate the location. That includes not just the sun, but also the light from the moon as many corals seem to only spawn during certain tides. Of course no LED is perfect so he’s even experimenting with putting light sensors under the water to provide a feedback loop to make it perfect.
We really like the ambition of this project and we hope he continues.
[Stephen B.] kickstarted a MicroPython board. When he got it, he was pleasantly surprised to find that it worked great. His jaded soul balmed with a good experience, he found himself armed with a tool in search of a project. Then he remembered something that had stuck with him, which was a tide clock.
He lives 70 miles from the sea, but his stepmother had a birthday coming up. She went swimming daily, so he had his excuse to build. Unlike his inspiration project, a bunch of seven segment LEDs would not be received well by a technically disinclined stepmother with a well decorated home. So, instead of those, he went with an epaper display. It looks great.
He wanted to use the Kindle display to save money, but the weird power levels needed scared him off. He spent a bit more on a module, but it was probably worth it in time savings. Micropython board, an RTC, a battery, and e-paper display in hand, he had everything needed to build the clock but aesthetics.
Luckily a local frame shop entertained him by letting him pick up frames until he could find one that fit. He put a nice shoreline print together, installed the devices into the frame, and ended up with a really good looking clock. Sure it only tells time four times a day, but that’s enough if you live a life by the sea.
If you’re completely landlocked like I am, you may dream of ocean waves lapping at the shore, but you probably don’t think much about the tides. The movement of the ocean tides is actually quite important to many groups of people, from fishermen to surfers to coastal zone engineers. The behavior of the tides over time is helpful data for those who study world climate change.
Early tide prediction was based on observed changes in relation to the phases of the Moon. These days, tide-predicting is done quickly and with digital computers. But the first purpose-built machines were slow yet accurate analog computation devices that, as they were developed, could account for increasing numbers of tidal constituents, which represent the changes in the positions of tide-generating astronomical bodies. One of these calculating marvels even saved the Allies’ invasion of Normandy—or D-Day— in World War II.
Continue reading “How Analog Tide Predictors Changed Human History”