STM32F103C8T6TR 32 Bit ARM Cortex M3 Microcontroller STMicroelectronics

The STM32F103C8T6TR's advanced timers and PWM capabilities make it ideal for motor control:

• Industrial Automation: A solar-powered automation system uses the chip to control four 12V geared motors via MD20 Cytron motor drivers. The microcontroller generates PWM signals (via TIM1/TIM3) to adjust motor speed and direction, while an RTC (DS3231) and I2C LCD handle timing and user feedback.
• Robotics: A servo motor control project demonstrates precise angle adjustment using PWM. The code configures TIM2 to generate 20kHz signals with variable duty cycles (0.5-2.5ms pulses), enabling smooth servo positioning.
• PID Control: In motor-driven systems, the STM32F103C8T6TR's ADC (12-bit, 10 channels) reads feedback from encoders or current sensors, while the Cortex-M3 core executes PID algorithms to maintain speed/torque stability.

The microcontroller interfaces with multi-channel sensors for analytical applications:

• Environmental Monitoring: A spectral sensor system integrates the Adafruit AS7262 (visible light) and AS7261 (UV/IR) sensors. The STM32F103C8T6TR reads sensor data via I2C, processes it using the Cortex-M3's DSP capabilities, and displays results on an ST7735S OLED (160x128 resolution).
• Weather Stations: A DHT22 (temperature/humidity) and BMP180 (pressure) sensor setup uses the chip's ADC and I2C to log environmental data. The data is displayed on a 16x2 LCD and can be extended with SD card logging via SPI.

With support for CAN, RS485, and USB, the STM32F103C8T6TR enables robust industrial connectivity:

• CAN Bus Applications: A user project implements CAN communication between two "Blue Pill" boards (STM32F103C8T6) using TJA1050 transceivers. The microcontroller configures CAN1 with filters and baud rates (e.g., 1Mbps), while handling error detection and message prioritization.
• RS485-Based Telemetry: A telemetry system uses UART-to-RS485 conversion to collect data from industrial sensors. The STM32F103C8T6TR stores data on an SD card via SPI (FATFS library) and communicates with a host via UART, ensuring reliable long-distance data transmission.

The chip's low-power modes (stop/standby) and compact LQFP-48 package suit battery-powered designs:

• Real-Time Clock (RTC) Watches: A project leverages the STM32's internal RTC and an SSD1306 OLED (I2C) to display time/date. The system runs on a 3.3V battery, with power management features like Vbat backup for the RTC.
• LED Lighting Control: A battery-powered LED indicator circuit uses the microcontroller to toggle an LED (PA1) with adjustable duty cycles for energy-efficient operation.

While not automotive-grade, the STM32F103C8T6TR is used in prototyping and niche applications:

• Vehicle Telemetry: A proof-of-concept project logs CAN bus data (e.g., engine RPM, battery voltage) onto an SD card. The microcontroller's SPI interface (up to 18Mbps) ensures fast data writes.
• Lighting Control: The chip's GPIO pins (37 total) can drive MOSFETs for LED headlight dimming, with PWM (TIM1) and ADC-based ambient light sensing.

The STM32F103C8T6TR's 64KB Flash and 20KB RAM support local data storage and preprocessing:

• Sensor Networks: A weather station logs DHT22/BMP180 data to an SD card (via SPI) using the FATFS file system. The code implements cyclic redundancy checks (CRC) to ensure data integrity.
• Industrial Monitoring: A motor control system with RS485 communication uses the microcontroller to log motor status (speed, temperature) and transmit alerts via Modbus RTU.