Wijanarko, HeruMaulidiah, Hana MutialifPrebianto, Nanta FakihPanggabean, Ronni Lodiwik T2025-07-022023-03-31IEEEhttps://repository.polibatam.ac.id/handle/PL029/4044PT Patlite Indonesia is a Warning Signal Lamp manufacturing industry that has grown rapidly since its inception. In the process of making signal lights, several processes are needed to ensure that the products produced are by ISO 9001: 2015 standards. One of the processes carried out in the industrial world is the inspection process. Inspection is a process carried out to ensure the quality of a product produced in accordance with standards, regulations, and customer satisfaction results. The use of a checksheet is one of the inspection processes carried out to assess the quality of the product produced. However, using check sheets to assess product quality requires a lot of time and effort in recording the results of each inspection. Therefore, a Signal Light Inspection Tool was designed using a Data Logger-Based Microcontroller that can store inspection data automatically. An inspection tool made using the data logger method to store data from signal light inspection results. This inspection tool has been successfully tested on 4 product models with productivity efficiency results of 111.8%. The inspection tool created has the advantage of being able to store the results of flow inspection data automatically, shorten production time and increase production output data.otherTECHNOLOGY::Electrical engineering, electronics and photonics::ElectronicsTECHNOLOGY::Electrical engineering, electronics and photonicsArticle3222011004001004860400290895010002038902KODEPRODI20406#TEKNIK ELEKTRONIKA MANUFAKTUR