Based on Ametal platform development, rapid development and design!

The traditional knobs adopt mechanical structure, and need to open holes on the panel. It is easy to wear, dust and so on for a long time. The new type of magnetic knob can be used to solve the above problems easily. This magnetic knob adopts ZLG brand 32-bit ARM single-chip microcomputer ZLG116 as main control, and based on Ametal platform development, it can quickly complete development and design.

The traditional knob control adopts a structural design similar to the following diagram. The knob cap and the inner part need to be connected. This inevitably requires a hole in the panel, so that dirt, oil and other dirt will easily enter, and when serious occurs, Water damage to the internal control circuit. This is the user does not want to see. Therefore, a magnetic knob for isolating the closed adsorption structure emerged.

The following figure shows the application of the magnetic adsorption knob. A gas adsorption magnet module can be directly placed on the gas stove panel at a specified position (automatic positioning within a certain area). Rotating the knob can adjust the size of the firepower. When not in use, it can be directly lifted to prevent children from touching. Of course, it is even more critical that the panel can be easily cleaned to prevent dirt from entering and prolong its service life. There is a magnet inside the knob. Rotation can make the magnetic angle sensor inside the panel sense the rotation angle. Induction magnets must use magnets that are radially magnetized so that they can change the direction of the magnetic lines of influ- ence in the horizontal plane. The magnetic lines in the vertical direction do not affect the angle measurement. The magnetic field strength must be greater than 30 mT to accurately measure the angle.

As shown in the following figure is the overall block diagram of the magnetic knob, the main control ZLG brand microcontroller ZLG116, its powerful function can easily read the sensor angle and upload to the host computer system, and ZLG116 has a very low power consumption, for Battery applications are a good choice. The magnetic angle sensor can not only measure the size of the rotation angle, but also measure the intensity of the magnetic field so that it can be perceived when the knob is close to or far away. This function can be used to identify the pressing motion of the knob or to identify the movement of the knob module. The entire module adopts UART interface for external communication, which can be easily started for development, and has great advantages for application development on later products.

As shown in the following figure is our demo board of the magnetic knob board. The master on the board is the ZLG brand Cortex M0 core MCU ZLG116, which is a domestic MCU with a very high cost performance. The circular area inside the board is the core module area, which can be made very small. It can be directly used by the user for modularization to avoid various debugging problems caused by the secondary development in the later period. Accelerate customer product development.

The ZLG116 is a 32-bit microcontroller using the high-performance ARM® Cortex®-M0 core. The maximum operating frequency is up to 48 MHz. The built-in high-speed memory, rich I/O ports, and peripherals connect to the AHB and APB buses. A variety of power-saving modes of operation to ensure the requirements of low-power applications.

In order to allow users to quickly evaluate the product, we provide an easy-to-use and feature-rich evaluation kit, the AM116-Core, which maximizes the use of standard peripherals to source a variety of peripherals. It also provides peripherals with standard interfaces. Accessories, users can choose to free assembly, rapid formation of prototypes, to seize market opportunities.

The hardware design standards adopted by the AM116-Core are in line with the Amital development at the software level. AMetal's standard API interface mainly implements standardization of peripheral operations, avoids re-development of upper-level software and drivers, and improves software development efficiency. According to actual needs, the interfaces corresponding to the three layers of hardware layer, driver layer, and standard interface layer of AMetal can be used by applications. Provides a wealth of reference materials such as chip manuals, supporting modules, AMotal sample source code, hardware schematics, package libraries, and hardware design guides to assist developers in quickly completing product designs.