Aqua328 flexible aquarium controller

I've made a PCB, which first involved fitting a new ESP-32 based controller into my CNC 😁

Now I need to assemble and test, I've got all the components ready. I'll write a test sketch and verify before I publish the plans.

Also, going to put a 8mhz crystal in mine, which might involve setting fuses in the 328p. 

I dont need to prototype most of this, it's pin connections and a mosfet circuit I have used before. But the loudspeaker / buzzer and it's single-transistor amp did deserve a test before I cut a PCB. 

This has duely been breadboarded, and works rather well (It's a suggested circuit on a number of electronic design sites). Loud enough to be heard across a shop if needed.

Next step: make the Mk1 board.

Three stages to this; and I'm only halfway through the 1st. Sigh

1) Hardware, I have a design, and a (good) pcb plot now. I want to prototype the speaker/buzzer driver circuit before I finalise and make the PCB. It's still a bit of (educated) guesswork design.

2) Then I need a software framework.

3) Finally the fitting into an aquarium; which is not a trivial task.