RANCANG BANGUN SISTEM SENSOR DAN TRANSDUSER BERBASIS MIKROKONTROLER UNTUK STUDI EKSPERIMENTAL PEMANTAUAN DAN PENGUKURAN BESARAN FISIS

Abstract

A detailed engineering of the sensor-transducer system based on microcontroller for
experimental study to monitoring and measuring against the amount of physic through steps: (a)
integrating the sensor-transducer system to the microcontroller system, (b) programming the
microcontroller to operating the actuator system, and (c) verification test against the program in
the microcontroller. Integration of the sensor-transducer system to the microcontroller system,
namely providing of five prime pins in the microcontroller for the lines of input and output. Five
prime pins were connected to: (i) power supply 12 volt dc, (ii) SHT11 sensor, (iii) LCD 2x16,
(iv) downloader, and (v) output. Based on connection of the sensor-transducer system
to microcontroller system has obtained the addressing command of "00000011" for measuring the
temperature and addressing command of "00000101" for measuring the relative humidity. Using
the Basic Compiler (Bascom) language to programming against the microcontroller with
two targets, namely the conditioning of temperature and relative humidity. The verification test
against the program for the achievement of target have been done. Target of the temperature are
23 0C (lower target) and 25 0C (upper target), where (i) if the temperature was smaller than the
lower target, then the lamps was energized and handy cooler in the off situation; (ii) if the
temperature higher than upper target, then the lamp was un-energized and handy cooler in the on
situation; and (iii) if the temperature can be achieved according to the lower and upper target,
then the lamp was un-energized and handy cooler in the off situation. Target of humidity was
43% (lower target) and 45% (upper target), where (i) if humidity is smaller than the lower

target, then blower fan in the off situation and (ii) if the humidity is higher than upper target,
than blower fan in the on situation.