This work aimed to automate the most popular method to determine the cooking time of grains: the Mattson Bean Cooker apparatus. The proposed system is a low‐cost and a simple approach, offering the possibility of calibration according to the size of the analyzed grains. The automation is based on the use of magnets, Hall effect sensors, potentiometers, and an operational amplifier to monitor the plungers' positions. The time required for each grain to be cooked is shown in a LCD display, and the connection among all the components is made by an ATmega328 microcontroller from the Arduino UNO R3 board. The proposed system can be assembled in an already existent device, costing ~US$200. Its validation was made with two different grains: carioca beans (Phaseolus vulgaris) and lentils (Lens culinaris). Despite the differences between sizes, both grains were suitably analyzed with the developed system.

中文翻译：

---

Mattson Bean Cooker的自动化：一种简单且低成本的方法

这项工作旨在使最流行的确定谷物烹饪时间的方法自动化：Matson Bean炊具设备。所提出的系统是一种低成本且简单的方法，提供了根据所分析谷物的尺寸进行校准的可能性。自动化基于使用磁铁，霍尔效应传感器，电位计和运算放大器来监控柱塞的位置。LCD显示屏上显示了每种谷物的烹饪时间，所有组件之间的连接由Arduino UNO R3板上的ATmega328微控制器完成。拟议的系统可以组装到一个已经存在的设备中，价格约为200美元。其验证与两个不同的谷物制成的：卡里奥卡豆类（菜豆）和扁豆（小扁豆）。尽管尺寸不同，但使用开发的系统可以对两种晶粒进行适当分析。