3 years ago I was building my first prototype of this thing. Materials included a mason jar, a frisbee, a TicTac box, a discarded ikea bookshelf, and a wine cork. I took some pictures and Google reminded me about it today.

The dispenser motor with an eccentric load.

Electronics were all on a few breadboards in a take out container.

I had added an optional button that birds could press to get a peanut. That was way too easy - the pigeons figured it out in a few minutes. Them being able to see the peanuts in the jar may have helped attract them.

I've learned a lot from this project, and still learn more about design, electronics, materials, and birds every week.