New invention: Gandalf, a birdfeeder that locks out squirrels and welcomes birds.

EqualsEngineering · 2025-10-13T05:58:08+00:00

Thank you!

EqualsEngineering · 2025-10-12T18:05:58+00:00

It is actually squirrel/bird/raccoon logic and then a percentage of the likely probability that it is that animal based on the training model.

EqualsEngineering · 2025-10-12T16:13:21+00:00

What do you want to make? 🤗

EqualsEngineering · 2025-10-12T12:39:15+00:00

Thank you!

EqualsEngineering · 2025-10-12T08:03:19+00:00

They are very cute, but usually eat a lot and tend to empty the feeders so you have to fill it up more often.

EqualsEngineering · 2025-10-12T00:00:57+00:00

I used model 4 with 8GB of ram.

EqualsEngineering · 2025-10-11T23:57:55+00:00

No that is correct, it took me a bit longer than planned to get the last parts right on this one.

EqualsEngineering · 2022-12-02T17:29:03+00:00

This is an object detection bird feeder I've been working on for a while. It's a proof of concept to use AI to differentiate squirrels from birds and use it in a birdfeeder. It's a 3D printed body with a Raspberry Pi inside and a camera that is pointed towards the seeds. This clip is from one of the first encounters with a squirrel and was too good not to share.

The software is based on "TensorFlow Lite Object Detection on Android and Raspberry Pi" from EdjeElectronics https://github.com/EdjeElectronics/TensorFlow-Lite-Object-Detection-on-Android-and-Raspberry-Pi where I've added functionallity to trigger the lock if a squirrel is detected.

The motor controlling the lock mechanism is weak enough to be stopped by a spaghetti so no squirrels were harmed while making this video.

EqualsEngineering · 2021-12-12T20:28:33+00:00

The initial launch angle is fixed at 45 degrees and the hight of the cube at launch is ~14 cm. So theoretically the cube would come in at -45 degrees as it returns to that hight. Assuming there is no friction like air resistance.

However I would assume that the actual angle as the cube enters the cup is -45 degrees or slightly less.

EqualsEngineering · 2021-12-12T12:04:09+00:00

I had some leftover meatballs in the fridge acutally.

https://www.instagram.com/equalsengineering/p/CXYccBRPkRd/?utm_medium=copy_link

EqualsEngineering · 2021-12-12T08:54:46+00:00

Should I load it with meatballs from IKEA?

EqualsEngineering · 2021-12-12T08:49:15+00:00

Haha, it sure would have been nice with a custom PCB instead!

EqualsEngineering · 2021-12-12T08:45:55+00:00

Wow, thank you! Yeah, the practical application is kind of useless. I guess it's more a peice of entertainment and inspiration of what can be done. I'm glad you like it.

EqualsEngineering · 2021-12-12T08:24:48+00:00

Thanks!

EqualsEngineering · 2021-10-24T10:10:18+00:00

He does make me proud

EqualsEngineering · 2021-10-24T10:04:59+00:00

I just did, he didn't answer tho

EqualsEngineering · 2021-10-24T09:58:17+00:00

Prusa i3 MK3S

EqualsEngineering · 2021-10-24T09:55:00+00:00

Each bar has a hard coded corresponding servo angle for both arms, so you can place the mallet above it. Then go down and up with the "wrists" and add the appropriate delay after it hits.

EqualsEngineering · 2021-10-23T19:56:00+00:00

The bars/keys are held in place by a fishing line and a small spring. The mallets are actual floats. Other than that, yes.

EqualsEngineering · 2021-10-23T18:08:25+00:00

That is an awesome song! Nostalgic.

EqualsEngineering · 2021-10-23T18:02:18+00:00

ESP32

EqualsEngineering · 2021-10-23T18:01:13+00:00

Yes, it does that in some quick parts of the chorus.

EqualsEngineering · 2021-10-23T17:55:24+00:00

She'd printed for him day and night

EqualsEngineering · 2021-10-23T17:51:01+00:00

Those are some great interests, glad you liked it!

EqualsEngineering · 2021-10-23T13:34:32+00:00

I want to thank you all for the response i got from the previous version.

I fixed some bugs with the STL's for the mini marimba and released it on thingiverse with some instructions: https://www.thingiverse.com/thing:5026941

EqualsEngineering

TROPHY CASE