This is an old side project, which target is to crate an etching container that:
* is small and able to etch either one 15 x 10 cm or two 7.5 x 10 cm pcbs
* uses triac controlled cartridge heater to achieve a constant etching solution temperature
* mixes the solution by tilting the container using servo
* beebs when its ready
The project at the point is ready for testing on a fully functional prototype.