Hi, new to this so apologies if this seems basic to some.
I would like to use Arduino to read 18B20 Sensor, display on lcd but also have up/down switch or potentiometer to set desired temp, then Arduino keep it to that setting.
Any programming or tips would be appreciated, so would schematics if this has been done.
Regards,
(deleted)
Check out PID controllers - this type of control system seems to be very popular among the home brewing crowd. PID stands for Proportional Integrating Derivative - it looks at where it is now, where it wants to be, how much it has changed and how fast it is changing. There was even an article in Circuit Cellar a few years back on a HERMS controller using that method that was pretty good. A PID controller has to be "tuned" for your environment, the intent is to avoid huge overshoots etc. so what you want it to do basically is back off on the amount of energy going into the heater as it approaches the setpoint.
HERE is one decent intro to PID
Here is another that is good
Thanks for taking the time to reply. I had found that abbreviation on the NET and knew instinctively it had something to do with my project. Thanks for confirming this. I will look into it further. Thanks Again.