[pmrid (Peter)]

Well, cooler box #1 is now plugged in and running. I'm not taking images yet but the camera is in place and all else is ready - as soon as EBay produces my power supply.

The results so far are pretty pleasing. I started at an ambient of 28.6 C and after 65 minutes it is down to 6 C. On the usual basis of halving noise for every 5 degrees, I've already got it down by roughly 90%. The graph is levelling off now. It dropped down in 5 minute increments from ambient to 16, 12 10, 9, and so on down to 6. I expect it won't go much lower than 6. Of course, that's without the camera operating..

The Peltier unit is the one I ordered from the States. Here's a simple graph of that first hour.

The Chinese one arrived yesterday as well and I'm now glueing styrene to the outside of its box. Should be able to give it a run tomorrow I hope. The Chinese unit is not designed as a whole assembly. Rather, it is put together from loose parts and does not have the same degree of thought evident it it. For example, it has taken me a heap of time and messing about to isolate the hot side from the cooler box. But it's done now and I'll get some images up if anyone wants to have a look. I'm attaching a few images of the work-in-progress with the Chinese peltier. This box will take my modified 40D when it gets here.


Peter