Ikkaro

Best F-Droid Apps

We have already seen what is F droid, its advantages and why we should use it. In this article I want let you know some of its best applications. It is clear that this is very subjective because the best application will be the one that meets one of our needs. But here are a few that I think can help you.

So I’m going to leave the applications that I consider most interesting from this repository of Free Software applications. You will not find alternatives for some, and for others you will already have applications installed that do the same. It is a good time to assess if you are interested in transferring that application you use to another Free Software application.

Lego Boost Move Hub

El Lego Boost robotics kit it is based on three active parts, around which all the rest are assembled.

The most important is the Move Hub that contains a motor with 2 axes and the Bluetooth module to connect with the tablet or mobile. Since everything in Boost is done through its app.

The other two pieces are a second motor and a proximity and color sensor.

Difference between coilgun and railgun

I am preparing some articles on building a Gauss rifle, and I have noticed the confusion that exists between two terms, coilgun (gauss rifle) y railgun (rail weapon).

Although the two refer to magnetic accelerators, the physical working principle is different.

When I imagined a gauss rifle or an accelerator, the same image of geomax magnets and steel balls always came to mind, and I thought that the YouTube videos were the same but big. Anyway here is a mini explanation.

The Gauss rifle or coilgunIs a linear magnetic accelerator consisting of a succession of electromagnets to accelerate the metal part. The main advantage of coilgun is that you can do as long as you want and in this way the energy required per turn is less, but the counterpart the longer the barrel is made it is much more difficult to synchronize.

Google Science Fair

If you are looking for information for the 2020 or 2021 Google Science Fair I’m sorry to tell you that the project has been discontinued since 2019. At the moment it is not known if they will return to take a call for the most famous Science Fair, but it does not seem.

I’m used to internet content disappearing. I understand that they stop the fair, but not that they eliminate all the content with the projects and winners of the two years that could inspire so many kids. Right now all the content that existed redirects to Google Education, the videos have stopped working and the Twitter account is with protected tweets.

If you want to see what the Google Science Fair was and the incredible projects that were going on, in this article they are all compiled.

We hope they will celebrate it again soon.

Rotary Fletcher capstan table

Surely you have seen on social networks some animated image of a table that begins to rotate and opens, forming a star in the center and that ends up being much larger than at the beginning.

Well if you are curious you will like to know that it is a Fletcher Capstan Table and that it is worth around $50,000. It is “very” used on cruise ships and luxury yachts

Gear template generator

This is a collection of resources for working with gears. As I find them I am adding more.

Gears are a fundamental element in engineering and in our inventions. If we want to transmit movement, it is very easy that we have to use gears. We might buy them or we might want to make them at home.

Anyway I leave resources to be learned and tools to make our lives easier when using sprockets.

Best slingshots

There are many ways to make slingshots and someday I will talk about how to make homemade slings.

When I talk about professional slingshots I mean slings for hunting and/or competition.

When I talk about professional slings I mean slings that are used in shooting competitions or for hunting because of their great precision and power. In many countries they are considered a weapon.

It has a stabilizer and an automatic ball or ammunition dispenser. Useful ideas to make a homemade one, especially the stabilizer…