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All Journal EDUCATIONE: Journal of Education Research and Review
Yohanis Prasetyo Dalekes
Politeknik Negeri Manado
Education Social Sciences

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ARDUINO UNO DIGITAL DISPLAY SYSTEM FOR AUTOMOBILE BATTERY VOLTAGE AND CURRENT MONITORING Leonardo Pasla; Yohanis Prasetyo Dalekes; Jeditjah Naapia Tamedi; Tammy Tinny Veisy Pangow; Alfred Noufie Mekel Mekel
EDUCATIONE Volume 4, Issue 2, July 2026
Publisher : CV. TOTUS TUUS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59397/edu.v4i2.279

Abstract

Automobile batteries require practical monitoring of voltage and current to support early identification of abnormal operating conditions. This study aimed to design and implement an Arduino Uno-based digital display system for monitoring a nominal 12 V automobile battery. The prototype integrates a resistor-divider voltage sensor, an ACS712-20A current sensor, an LM2596 DC-DC converter, a 16×2 I2C liquid-crystal display, and a buzzer. A Research and Development approach organized as an engineering design cycle was used, covering system design, prototype assembly, functional testing, and evaluation. Voltage readings were compared with a digital multimeter at five test points and produced a mean absolute percentage error of 0.38%. Current readings were examined under five charging and discharging conditions and produced a mean absolute percentage error of 3.61%; the largest relative deviation occurred at the lowest-magnitude discharge point. The buzzer remained off at 11.50 V and activated below 11.50 V, confirming the programmed comparator logic. The findings support the prototype as a simple continuous voltage-current and status monitoring device under the tested conditions. The study does not establish direct ampere-hour capacity or validated state-of-charge estimation; further validation with calibrated reference instruments, repeated measurements, multiple batteries, environmental variation, and dynamic automotive loads is required.
DESIGN OF A DIGITAL DISPLAY SYSTEM FOR FUEL CONSUMPTION MONITORING IN FOUR-WHEELED VEHICLES Yohanis Prasetyo Dalekes; Leonardo Frando Pasla; Jedithjah Naapia Tamedi Papia; Alfred Noufie Mekel; Tammy Tinny Veisy Pangow
EDUCATIONE Volume 4, Issue 2, July 2026
Publisher : CV. TOTUS TUUS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59397/edu.v4i2.286

Abstract

Real-time fuel-consumption information can support more transparent evaluation of vehicle operating efficiency, but low-cost direct-flow prototypes require validation before vehicle deployment. This study designed and evaluated a digital display prototype using an Arduino Uno microcontroller, a YF-B6 Hall-effect water-flow sensor, an LM2596 voltage regulator, and a 20×4 I2C LCD. A prototype-development procedure covered literature review, workflow analysis, hardware and software design, bench sensor testing, system integration, and evaluation. During bench testing with water, one reported sensor reading was compared with each nominal reference volume from 1 to 5 L. Percentage error was calculated as |V_actual − V_sensor|/V_actual × 100. The sensor readings were 0.98, 1.96, 2.95, 3.93, and 4.91 L, producing errors of 2.00%, 2.00%, 1.67%, 1.75%, and 1.80%, respectively, with an average error of 1.84%. All pointwise errors were below the YF-B6 ±3% specification. The readings consistently under-reported the nominal volumes, indicating a systematic calibration bias that may be addressed through calibration correction. Because the prototype was tested with water rather than automotive fuel and was not validated on a moving vehicle, the results demonstrate bench-scale volumetric performance rather than final on-vehicle fuel-consumption accuracy. The system is therefore positioned as a low-cost proof of concept for subsequent fuel-compatible and on-vehicle validation.
Co-Authors Alfred Noufie Mekel Alfred Noufie Mekel Mekel Jedithjah Naapia Tamedi Papia Jeditjah Naapia Tamedi Leonardo Frando Pasla Leonardo Pasla Tammy Tinny Veisy Pangow