Over the past couple of weeks, I've been getting everything ready for the v3.1 boards to be sold online.

After receiving the new boards, plus parts to make one board, I soldered one and tested all of the features using the same methods I used to test v3.0. All of the issues that I had identified were successfully fixed in this revision.

I also rearranged the headers to be mostly concentrated on one side of the board. This improved the usability of the board's features slightly, as a breadboard can be placed on one side of the board and easy access most signals.

Now that the boards were designed and tested, I decided to work on selling them on Tindie. This required a few steps: setting up the Tindie shop, taking photos, and preparing shipping. The most time consuming of these steps was shipping. I had to figure out a good base rate to charge for anywhere in the US, and also one for certain international destinations (which is harder, as different countries cost different amounts to ship to). I also had to choose what packaging I would use to ship the board. To do all this, I took a few trips to the post office and sorted everything out. I'm now confident that I'm giving the best deal I can on shipping to anywhere in the US and some international destinations.

At the time of writing, I have 7 boards in stock. I'm not expecting to sell many at all, so I believe that will be more than enough for now!

You can find the Tindie listing to buy the boards here. I appreciate every sale I get and each one motivates me to continue to work on the project.

Next up on the project agenda is to complete the modular system. This includes a backplane that can attach to the ZTO-80 SBC using the expansion header and horizontal headers. When I get to a good spot, I'll post an update.