V1.2 PBC functional test

A project log for Vending Machine for Birds

Simple, inexpensive bird feeder that dispenses peanuts in exchange for dropping stuff in a hole. A vending machine for clever birds.

stephen-chaseyStephen Chasey 06/04/2023 at 12:590 Comments

The latest version of the PCB I received from PCB way works as expected - I managed to fix the mistakes I made in the previous versions without creating new ones.

I made a very brief video showing the basic fuctionality here:

I wanted to keep it short so I could upload it to HAD (<50MB) so there are a few things I didn't demonstrate:

And some pics.

Bare board

Populated board

Side view

PIR and motor

Test rig

Still mulling a few component changes - mainly putting a 22R (instead of 47R) on the 555 output that runs the motor to give it a little more current and putting a 47R (instead of a 100R) on the 55 running the IR LEDs for the same reason, though it seems to work fine with 100R. Also, the 4700uF cap could be reduced if I use a larger value pot on the timer.

I also have some new PVC joints so I can optimize the enclosure a bit and facilitate checking operation and swapping batteries. I'm hoping to "finish" the design and construction part of this project within the next few months.