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Tri Isra Janwardi
Efarina University
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering

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Design of Digital Height Measurement Based Microcontroller AT89C51 Tri Isra Janwardi
Journal of Science Technology (JoSTec) Vol. 1 No. 1 (2019): Journal of Science Technology (JoSTec)
Publisher : PT Inovasi Pratama Internasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (366.449 KB) | DOI: 10.55299/jostec.v1i1.49

Abstract

Height measuring instrument is a tool that can be used by humans to assist in the process of determining height. Most height gauges in use today are analog or manual height gauges. In today's technological developments, the author will make an automatic height measuring device using ultrasonic sensors to calculate data from received objects. The sensor is used to measure the working distance at a frequency of 40 KHz so as not to interfere with human hearing. As the control center of this measuring instrument, it uses the Arduino Uno Microcontroller. This measuring instrument is capable of measuring an object with the accuracy of the sensor reading the data, namely the maximum height of 195 cm and the minimum height of 50 cm. The advantage of this tool is that it uses a microcontroller and sensor technology, while to display measurement results using an LCD and LCD measuring instruments can move according to the height of the object, to move the LCD a DC motor is used as the driver. And the measurement results are issued through the speaker in the form of sound that has been stored on the SD Card in WAV format, making it easier for blind people to know the user's height. The drawback of this tool is the construction of the tool and sensor readings, so that the results obtained from the measurements still contain some errors.
Design of Automatic Doors Using Body Temperature Sensors Tri Isra Janwardi
Journal of Science Technology (JoSTec) Vol. 2 No. 1 (2020): Journal of Science Technology (JoSTec)
Publisher : PT Inovasi Pratama Internasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (879.494 KB) | DOI: 10.55299/jostec.v2i1.50

Abstract

In today's very rapid technological developments, many tools or products are produced that can help humans in every activity they carry out. The application of technology that can facilitate human activities, for example, such as automatic doors. Where everyone who approaches the door, the door will open automatically because the human body temperature is detected. This electronic device that detects body temperature uses the MLX90614 temperature sensor. This tool can work with a distance of about 2 cm. With automatic doors using a temperature sensor, this can be applied to every door of a room with high mobility such as hotel and mall lobby doors.
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