Simple and small temperature fan controll

I published this schematic long ago in this article: Adjustable power supply and since then I made some improvements in PCB to make the board as small as possible. The idea is to be easy to attach the whole board to the heat sink which we want to monitor. The board is only 27mm x 27mm.

Thermal controlled fans

Since many years I am fan of quiet computing, but I also like power computers and videocards because I like do play games from time to time. That's why I have tried number of different solutions to control the fans in my computer.

Adjustable lab power supply

I already have several lab power supplies, all of them made by myself. The latest (shown here in action) was almost perfect - two channels, 1.2 - 30V/3A - but there wasn't current limiting. That's why I was searching for suitable schematic to build. What I found is this schematic: http://www.electronics-lab.com/projects/power/001/index.html.
It has adjustable output voltage from 0 to 30V and adjustable max output current from few miliamperes to 3 amperes.
As it turns out there are serious flaws in it, but in the forum in that site it was thoroughly discussed and the member audioguru proposed an improved schematic, in which all flaws were addressed. I used his schematic to build my new power supply.