A digital A/C is the same as a window A/C unit, just with digital controls. My understanding is with these, you can't just plug it into a temp control, as when it powers up you need to press the on (cool or power) button on the front of the unit. So a control that just cycles the power to the until wont work.
You can rewire the unit to work with a temp controller, and I have seen a few threads on here on how to go about doing that. The idea of using a DIY Coolbot is that I wouldn't need to rewire it as such.
My DIY Coolbot is using a length of Flexwatt Heat tape to wrap around the temp sensor from the A/C, to trick it into thinking it's warmer than it is. The temp controller I have is reading the temp from the cool room and when it gets above temp it turns the heat tape on, which in turn triggers the compressor on the A/C. Unlike the Coolbot my DIY version does not have a second temp sensor to check if the coils are freezing over. So I will need to keep an eye on this.
I think I will just set the fan to low for now and see how that goes. I'll try and post some pics of the build shortly, there is one of it almost finished on my facebook page here