Auto Sterile,
This device is used for steam sterilizing of medical instruments

User defines some information such as time of sterile,
sterile temperature,and hysteresis
for example: T-S =1 hr,20 min S-T =125 oC ,HS= 5 oC
then uController runs the heater to increasing temperature
when temp reaches to 125 oC then heater will be shut down
and time of sterile is starting
when temperature reaches to 120 oC again,
uController restarts the heater
this operation continues until the time is terminated.
I design this project based at89c52 this year
Good Luck
Mehdi