Power supply voltage: 5V and 3.3V on-board voltage regulator components, 9V external DC power supply can be used, and the power supply has anti-reverse function
Crystal frequency: 8MHZ, 9 times internal frequency of the chip, working frequency 72MHZ.
Basic parameters of 8-channel (24bit) A/DC converter board: Size: 82.8mm X 53.4mm Plate thickness: 1.6mm Chip model: STM32F103C8T6 (single chip), ADS1256 (24-bit precision AD conversion chip) Power supply voltage: 5V and 3.3V on-board voltage regulator components, 9V external DC power supply can be used, and the power supply has anti-reverse function Crystal frequency: 8MHZ, 9 times internal frequency of the chip, working frequency 72MHZ. 8-channel (24bit) A/DC converter board Hardware teity: This board has taken all the IO ports of STM32F103C8T6 microcontroller, and users can develop their own functions. The program can be downloaded through the serial port. For details, see the documentation. Since the program can be downloaded through the serial port, there is no JLINK download debugging interface on the board. The AD chip has a reference voltage of 2.5V and is generated by a precision voltage regulator. A potentiometer is provided on the board to test the AD input. The voltage generated by the voltage divider of the potentiometer is connected to AN0 through the S3 jumper, which is suitable for debugging the board without the sensor. If you do not use this test, you can take the S3 jumper off and input the test voltage directly from AN0--AN7. (The voltage input to the AD input cannot be higher than 5V) The following describes the specific functions of the three modes one by one: //Mode 1: Continuously acquire single-channel AN0 analog voltage for ADC conversion, and calculate the converted data as voltage value, send data out through serial port in ASCII code form. In this mode, serial port assistant software can directly read voltage, suitable for software development. Engineers use it because they don't need to know any principles of microcontroller hardware.
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