1. power input terminal, input voltage range 5.5V - 12V (5V power supply, please connect directly to 2);
10. power indicator light LED;
2. 5V power supply input terminal (1.2 two power supply, only one can);
11. JTAG interface, designed by the definition of JLINK-V8 or V9;
3. STM32F103C8T6 leads to GPIO, which is convenient for the development of two times. The silk screen is directly corresponding to the pin number of the chip.
12. unmarked;
4. new original master control MCU: STM32F103C8T6;
13. STM32F103C8T6 reset button;
5. 2.5V datum, ultra high precision, low temperature floating;
14. USB to TTL connection, corresponding to MCU TX, RX, GND, can communicate directly with the computer;
6. adjustable potentiometer, output adjustable voltage link to AIN0/ I0;
15. imported 3232 serial port communication chip;
7. the 8 channels of input are collected, the I0-I7 is connected to the positive end of the acquisition voltage, and the G is simulated, and the negative end of the acquisition voltage is connected.
16. serial port, mother head;
8. input filter and attenuation resistance, default does not do attenuation, leave the position of welding attenuation resistance, 0603 package;
17. the output voltage of the adjustable potentiometer is controlled by I0 / AIN0: disconnecting the IO suspension, and measuring the output voltage end of the adjustable potentiometer by I0;
9. ADS1256IDB collection chip, new original import;
18. STM32 BOOT0 and BOOT1 select control jump cap;
