Automatic Flag Waver Lets You Show Your Loyalty Without Getting Tired

A flag is a great tool to show your loyalty to a country, a sports team or even a philosophical movement. But there’s not so much you can actually do with a flag: you can either hang it somewhere, or wave it around to attact others to your cause. [Mellow] found that waving quickly becomes tiresome, and decided to design a machine that automates this task for him.

A man holding a device that waves two small rainbow flagsNow there’s a bit more involved in designing a proper flag-waver than simply moving the flag back and forth. Ideally, the fabric should flow smoothly from side to side and show both sides equally, in the same way a human would do when waving a big flag around. After a bit of research [Mellow] decided on a design that generates a rather complex motion using just a single servo: the mast is tilted from left to right, while gravity ensures the flag rotates around its axis. It’s probably best demonstrated visually, as [Mellow] does in the video embedded below.

The flag-waving mechanism is designed in Fusion 360 and 3D printed using white filament. Inside a little square box is a Wemos D1 Mini, powered by a lithium battery scavenged from a vape pen, as well as a battery management system and a power switch. The servo sits on top of the box and holds the flag in a little socket that allows the mast to rotate freely. [Mellow] also went one step further and built a two-flag waver, which still uses only one servo but creates two opposite motions through a set of spur gears. Both waver types bring a lively atmosphere to their surroundings, and we can actually imagine them being useful in places like sports bars.

Automatic flag-wavers are still rare devices, and as far as we can tell this is only the second one we’ve seen, after this hat-mounted example. That is, if you don’t count the automatic “flag” on this mailbox.

31 thoughts on “Automatic Flag Waver Lets You Show Your Loyalty Without Getting Tired

    1. Thats the progress pride flag. Take the six color gay pride flag, and add a double chevron, hoist side in black & brown, to recognise the contributions of people of color, and a triple chevron in blue/white/pink to echo the transgender pride flag.

      Personally, i think they should have gone with the original 8 color pride flag. Dyes have gotten so much cheaper and more stable, Baker’s original intent could actually be mass produced now. But then no one would know what it was.

      1. The more characters get added to this the more normal people who have mistaken this for the new peace sign are going to figure out this is a pyramid shaped world view with ideologist putting them selves at the top of said pyramid.

    1. It’s funny how if there’s ever a spot without constant moderation and deletion, everybody can see how unpopular the current overarching cultural experiment is. This thing doesn’t have another 100 years left on the tires.

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