I have a lot of video to go through, but I found this from this afternoon. One pigeon has been camping on the feeder trying to figure it out. I've seen him drop stuff in several times. This clip shows it getting lucky at 1:32, 1:50 and 2:12.
Unfortunately it's hogging the machine and other birds don't have much chance to approach.
I'll give the pigeon the rest of the week, then I have to move it out back. There's a family of jackdaws that I've been feeding peanuts in the shell on the back balcony to for a couple of weeks. I'd like to give them a try.
I'm pretty confident about the design after it's been outside for a couple of weeks now and the batteries are actually going strong. I tried a few modifications and noticed the motor had a weak connection to the breadboard. Now it's back to normal. I need to start with the PCB soon - breadboards in a vibrating housing is asking for trouble.
I'd like to build a second one, too. I already have another wooden wine box and some jars.