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All Journal IPTEK The Journal of Engineering
Ika Silviana Widianti
Unknown Affiliation
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Mechanical Engineering

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SIGN AND IMPLEMENTATION OF ELECTRICAL SISTEMS FOR BREAD DOUGH DEVELOPMENT PROOFER TECHNOLOGYS BASED ON MICROCONTROLLER WITH PID CONTROL FOR DONUT DOUGH Mashuri Mashuri; Ika Silviana Widianti; Bambang Sampurno; Hendro Nurhadi; Muhammad Syaiful Hakim
IPTEK The Journal of Engineering Vol. 11 No. 3 (2025)
Publisher : Pusat Publikasi Ilmiah, Institut Teknologi Sepuluh Nopember.

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Abstract

The proofing process is an essential step in bread-making, where the dough is allowed to rest for the gas content to develop and form a soft structure. However, many small-scale bread producers still rely on manual methods for proofing, leading to unstable temperature and humidity levels and longer production times. This study focuses on developing an electrical system for a bread proofer that can stabilize temperature and humidity during the proofing process. The system includes an Arduino Mega microcontroller with a DHT22 sensor for real-time temperature and humidity detection, an I2C LCD for monitoring, and a potentiometer for setting the desired temperature and humidity values. To achieve stability, a PID control system is used. The results show that the system can stabilize at a temperature of 40.10oC and humidity at 80-90RH for approximately 38.4 minutes. This electrical system offers an effective solution for optimizing the proofing process in bread production.
Surface Characteristics Comparison of Machining Waste Using Powder Metallurgy Method Ika Silviana Widianti; Ahmat Syafa'at; Yoga Kartiko Raharjo; Suhariyanto Suhariyanto; Giri Nugroho
IPTEK The Journal of Engineering Vol. 11 No. 3 (2025)
Publisher : Pusat Publikasi Ilmiah, Institut Teknologi Sepuluh Nopember.

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Abstract

Machining processes generate metal waste in the form of fine powder that is often not reused efficiently. This study explores the potential reuse of metal machining waste powder through powder metallurgy, focusing on how sintering temperature affects mechanical properties and microstructure. Metal powder from ST60 steel machining was compacted and sintered at 1100°C, 1150°C, and 1200°C. The specimens were then compared to original ST60 steel. XRF analysis confirmed that iron was the dominant element in the waste powder. Microstructural analysis showed the presence of ferrite and pearlite in all specimens, with higher sintering temperatures increasing the ferrite content. In terms of mechanical performance, ST60 steel showed the highest hardness (80.6 HRB) and compressive strength (156.157 N/mm²). Among the specimens, the one sintered at 1100°C had the highest hardness (65.1 HRB) and compressive strength (73.293 N/mm²), closest to ST60 steel. The lowest surface roughness (7.058 Ra) was observed in the 1200°C specimen, approaching ST60’s value (2.003 Ra). These findings indicate that reused machining waste powder can be processed into useful products, especially for low-load applications, with optimal properties achieved at 1100°C sintering temperature.
Co-Authors Ahmat Syafa'at Bambang Sampurno Hendro Nurhadi Mashuri Mashuri Muhammad Syaiful Hakim Nugroho, Giri Suhariyanto Suhariyanto Yoga Kartiko Raharjo