Nowadays, technological developments interactions in general, couldn't be separated from the rapid development of computer technology and human interaction. So that, supporting the user to be able to develop various models of interactions, especially the interactions between humans and robots. This study proposes a model of design and manufacture of human and robot interaction, in the form of a visual display on a computer controlling the robot motion. Object interaction in this study is using 4WD Smart Car Robot. Some of the tools used to build a robot control system at the time of interaction, including Netbeans IDE, based on JAVA and Arduino. The control algorithm is applied to build an optimal control system to model an interaction between humans and robots. Model of human interaction and robot is fully carried by the user in control of robot motion. The proposed interaction model can be implemented in real terms, in designing and making a model of human interaction and robot.

No abstract

The level of acid or base in water based on solution (pH) is a very important measure for living things because about 70% in the body consists of water. Most of the metabolism in the body requires a certain pH level. Having a rapid and accurate pH meter is very demanding, but most of the available pH meters take several minutes to measure the pH of the liquid. The measured water is mixed with fluorescent liquid and then excited with violet light at a wavelength of 405 nm. We have developed a pH meter based on optical fluorescent using pyranine extracted from yellow highlighter using isopropyl alcohol. The pH meter based on optical fluorescent have advantage compared to other methods in terms of measurement time. The intensity of the green fluorescent emitted from the liquid sample is then captured by the AS7262 spectral sensor. A pH sensing device has been developed, tested and verified to be able to measure pH from a range of 4 to 11 with an accuracy of 98.13%, a reading error value of ±0.13 and only takes less than 3 seconds to take measurements.