Thanks for the response. I am looking for such a test board.
Using a project board sounds reasonable, but I would prefer to start with a known good design. Having an untrusted board and an untrusted process sounds like trouble. I do not have any experience laying out PCB boards, but would like to learn. I stopped designing/building in the 1990s when things got too small. I'm motivated to try again using reflow.
I've been looking through OSH Park for boards, but so far haven't seen anything I like. This is why I'm asking the community for suggestions.
Desired features (my wish list):
* Cheap. Under $10 for the board and $10 BOM. The idea is to allow for multiple test runs. There are a lot of things to experiment with.
* Stand-alone and Testable. Even a blinking LED would be good, such as a 555-based circuit
* Known BOM
* Stencil available
There are a lot of boards on OSH Park with no documentation (no BOM, no clue what they might do if functional). There are a lot of very expensive boards, which I feel are not suitable for learning. I found a 555 blinker board for $5, but it is through hole. No documentation, just a board.
There are SMD solder practice kits, which sound promising. But none seem to have stencil availability. I am not interested in learning to hand solder parts.