Ecto one syrin1/22/2024 ![]() Suspect this will be more fun as a rock solid project that runs all day and can be treated as a toy than as a complex and delicate project containing >$100 in parts. Ecto.Schema - schemas are used to map external data into Elixir structs. A repository needs an adapter and credentials to communicate to the database. Via the repository, we can create, update, destroy and query existing entries. While I fully endorse the fun and learning that would come from this do suggest getting the bits for the simple flashing light option as well, build it first and keep it as the alternate if closer to the race day the software option is looking like a problem. Ecto is split into 4 main components: Ecto.Repo - repositories are wrappers around the data store. If you want add a self contained buzzer (not a siren but simple, cheap and loud)įor a half way step would suggest looking atĪnd other elements of the wearable line up to get power, lights and sound as required.Ĭritical thing here is that doing this with a microcontroller will be hard, both software and hardware and involve some serious time and money to complete. Get the mix of LEDs you think you need matched to the battery voltage you pickedĪdd a tilt switch (mercury is better, metal ball less likely to get you in trouble) to turn it on when on the ramp (or other less exciting and faster sources) If you are prepared to delete this feature will echo paul in saying that this turns into a simple and robust project: The complex part of this is the sound effects. ![]() To achieve this you'd be looking at buying three sets of hardware, since something this small will need at least one prototype and you need spares as well. ![]() As paul noted above the Teensy way would be a teensy 3.2, the prop shield (has amp +tilt sensors), biggest speaker that'll fit, and the biggest battery+5V boost converter that'll fit. All of the above is doable, but getting sound out of a pinewood derby sized unit isn't trivial due the small size of the speakers you can fit. ![]()
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