Abstract :
The use of air conditioners (air conditioners) on the outside is
commonplace we find, starting from office buildings. Schools to shopping centers.
But with the use of air conditioning, the cost of using electricity will also
increase.To reduce the costs needed to design a system that can be used to control
the signals in the Arduino Uno microcontroller.In this final project, PIR as a
sensor for human condition inside will activate AC. Retrieval of data collection
that is used is the lecture room 1There are 10.79% efficiency