

 

| 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~ |