This design can be 3D printed using either ABS or PLA. We also design a suitable enclosure for this project, and its design files are available to download at. According to our observations, most of the counterfeit STM32F103C8T6 MCUs failed to initialize the RTC and USB peripherals at the startup. During the prototyping stages, we found a few counterfeit STM32F103C8T6 MCUs which are not working properly with this firmware. When assembling the sensor module, we strongly recommended using the genuine STM32F103C8T6 MCU for this project. Its firmware has been developed to work with the Meade LX200 communication protocol, and no additional modifications are needed for Stellarium to work with this sensor kit. The StarPointer is designed to work with Stellarium's telescope control plugin. After performing the above steps, the unit is ready to use with the Stellarium. This configuration software allows StarPointer to set the latitude and longitude of the observation location, RTC date/time, and RA and DEC offsets. After attaching the unit, the user needs to calibrate the StarPointer using the configuration software. This unit can attach to any astronomical telescope or binocular regardless of its type or mount. The firmware of the StarPointer is developed using the LibOpenCM3 library and built using GNU ARM Embedded Toolchain. This unit communicates with the PC using the inbuilt USB peripheral of the STM32F103C8 microcontroller. The StarPointer builds around the STM32F103C8 microcontroller, ADX元45 3-axis accelerometer, and HMC5883L 3-axis magnetometer. After obtaining that information, the unit calculates the RA (right ascension ) and DEC (declination) coordinates of the telescope and transfers those details to the Stellarium. The StarPointer uses a few onboard sensors to determine its angle and position. This unit can be attached to the telescope without modifications and connects with the computer through the USB port. This device works with Stellarium and helps the observer identify objects in the sky. StarPointer is a virtual electronic finderscope for astronomical telescopes.
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