Michael Rigby-Jones wrote: > Unfortunately the author decided to use thermostatic control of the > TEC, which is definitely not recommended. The constant thermal > cycling of the TEC will cause premature failure. It's also less efficient. The efficiency of a peltier cooler decreases with increasing drive current. You therefore want to use a linear drive with these devices, probably contolled by a PID loop. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu