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Abstract
Suction is used in the medical field to take or drain fluids out of the body. Professional use of suction can be used to remove or reduce blood in the operated area to allow the surgeon to see and work on that area. Suction is also used to remove blood that is already in the skull after intracranial bleeding. Most of the suction devices used still have a simple appearance or still have a manometer, which means that the suction pressure on the suction cannot be adjusted automatically. Therefore, the aim of this research is to design a suction pump with motor speed using PWM (Pulse Width Modulation). The method for making this tool uses an Atmega328 microcontroller as a controller, an LCD (Liquid Crystal Display) as a display of pump suction speed and suction pressure, an MPX5500DP sensor as a suction pressure reader. To control the suction speed, the L298N motor driver uses a PWM (Pulse Width Modulation) signal with a maximum result of -178 mmHg. Testing was carried out at vacuum pressure using a DPM (Digital Pressure Meter), apart from that testing was also carried out on the circuit working system. Circuit testing is needed to find out the working principle of the circuit and the tools being made. After testing and measuring the tool, the error percentage was 0.86% for the smallest result. Meanwhile, the largest error percentage is 8.5%. The allowable correction value for the suction pump pressure parameter is ± 10% of the maximum scale of the tool setting point. So from the results of this analysis the tool is suitable for use because it is still within safe tolerance limits.