This is a simplified block diagram of a single channel.
	Starting on the left is the standoff assembly which consists of a mounting bracket, embedded thermistor, Peltier device, and heat exchanger.
	The thermisor is wired to an A/D input.  The desired setting is output by the D/A.  The difference of the thermistor and desired setting is used to determine the drive level to the Peltier device.
	~Melanie Leong~