STM32F103 PCB STM32 MCU Family Developer Board

Table of Contents

STM32F103 Color Board Introduction: Following the discovery that the breadboard for stm32 at Jiang University is not very practical, the author designed this board. The board includes 25Q16, AT24C02, ADC, DS18B20, buzzer, OLED, LED lights, RGB, independent buttons, with all pins externally accessible and independent.

The author found that the breadboard for stm32 at Jiang University is not very practical, as using a breadboard always involves a lot of plugging and unplugging, leading to messy wires everywhere, so it designed this board. The board includes 25Q16, AT24C02, ADC (simulated ADC using a potentiometer), DS18B20, buzzer, OLED, LED lights, RGB, independent buttons, with all pins externally accessible and independent.

There are no external pull-ups or pull-downs, so our program debugging will not be affected by external pull-ups or pull-downs, which makes it easier to use with certain sensors.

Schematic STM32F103 PCB STM32 MCU family developer board

About STM32 microcontrollers

STM32 is a family of 32-bit microcontrollers designed and manufactured by STMicroelectronics. These microcontrollers are widely used in a variety of applications, including industrial control systems, consumer electronics, and automotive systems. The STM32 family offers a wide range of performance levels and features, allowing designers to choose the right microcontroller for their specific needs. With a strong focus on energy efficiency, performance, and connectivity, STM32 microcontrollers are a popular choice for developers looking to create innovative and reliable embedded systems. Additionally, STMicroelectronics provides a comprehensive development ecosystem, including software tools, libraries, and support resources, making it easier for developers to get started with STM32 microcontrollers.

Component Explanation

i2C EEPROM
AT24C02 (EEPROM) I2C Communication The 24C02 is a 2Kbit serial EEPROM storage chip that can store 256 bytes of data. It operates in a voltage range of 1.8V to 6.0V, uses low-power CMOS technology, has a self-timed erase/write cycle, 1,000,000 programming/erase cycles, and can retain data for 100 years. The 24C02 has a 16-byte page write buffer and a write protect function. It communicates via the I2C bus at clock frequencies up to 400KHz. It is great for beginners to use for writing sequences.

About 24cxx eeprom
The 24CXX EEPROM is a popular type of electrically erasable programmable read-only memory (EEPROM) that is widely used in various electronic devices and systems. It comes in different memory sizes, such as 24C02, 24C04, 24C08, and so on, providing flexibility for different storage requirements. The 24CXX EEPROM is non-volatile, meaning that it can retain data even when power is removed. It can be easily programmed and erased electronically, making it ideal for storing configuration settings, small amounts of data, and other information that needs to be retained when the device is turned off. Its I2C communication protocol allows for easy interfacing with microcontrollers and other digital systems. The 24CXX EEPROM is a reliable and cost-effective solution for data storage needs in a wide range of applications.

SPI Communication
FlashRom is a fast erase-only memory, also known as “flash memory”, which is used in microcontroller program storage.
Flash memory is a non-volatile memory and an improved version of EEPROM. It requires block-wise erase and write operations and has a large chip capacity (W25Q16 capacity of 2M bytes). EEPROM, on the other hand, can perform operations on individual bytes and has a smaller capacity (24c512 capacity of 65536 bytes). The capacity of the former is 32 times that of the latter. Additionally, FlashRom has higher read/write speeds than EEPROM, and the chip prices are similar.

About 25qxx memory
25qxx memory is a type of serial flash memory chip that is commonly used in various electronic devices such as smartphones, tablets, and digital cameras. It offers high storage capacity and fast read and write speeds, making it ideal for storing large amounts of data and running applications smoothly. The 25qxx memory chip is also known for its reliability and durability, ensuring that data is securely stored and easily accessible when needed. Overall, 25qxx memory is a versatile and efficient storage solution for modern electronic devices.

DS18B20
One-Wire Temperature Sensor When connected to a microprocessor, the DS18B20 only requires a single wire for bidirectional communication between the microprocessor and DS18B20. Temperature measurement range is -55 °C to +125 °C, with inherent temperature resolution of 0.5 °C.

Operating power supply:
3~5V/DC. No external components are needed for measurements, and results are transmitted serially in 9~12 bits. ADC (Potentiometer Simulation) This is quite friendly for beginners, as the variables are controllable. Buzzer The overall effect is like.

BOM STM32F103 PCB STM32 MCU family developer board

Part	Value	Description	Quantity
Resistors
R1,R2,R3,R14,R16	10 kΩ (103)	R0805 — SMD resistor	5
R4,R5,R17	4.7 kΩ (472)	R0805 — SMD resistor	3
R6,R7,R8,R9,R10	1 kΩ (103)	R0805 — SMD resistor	5
R11,R12,R13	510 Ω (511)	R0805 — SMD resistor	3
R15	10 kΩ (103)	Variable Resistors 3296W	1
Capacitors
C1,C2,C3,C4,C5,C6,C7,C8,C9,C10,C11,C12,C13,C14	100nF	C0805 — SMD capacitor	14
C15,C16	100uF	SMD electrolytic capacitor	2
C17,C18,C19,C20	22pF	C0805 — SMD capacitor	4
Semiconductors
U1	STM32F103C8T6	64 KB 2V~3.6V ARM-M3 20 KB 72MHz FLASH 37 LQFP-48(7×7) Microcontroller	1
U3	6-pin self-locking switch 7×7	6-pin self-locking switch 7×7	1
U4	AMS1117-3.3	1A Fixed 3.3V Positive SOT-223-3 Linear Voltage Regulators (LDO)	1
U6	PZ2.54-2×2	2×2P 2.54 mm Pin Headers	1
U8	24C02	SOP-8 EEPROM	1
U9	W25Q16JVSSIQ	16Mbit SPI SOIC-8-208mil NOR FLASH	1
U11	2.54-1×6	1×6P P=2.54mm Pin Headers	1
IIC OLED	HS96L03W2C03	SSD1315 I2C 128×64 0.96 OLED display	1
LED1,LED2,LED3,LED4,POWER	LED-0805_R	LED 0603 RED	5
18B20	DS18B20	TO-92-2.5 mm Temperature Sensors	1
Q1	S8550	PNP SOT-23 Bipolar Transistors	1
RGB	TJ-L5FYTXHTCYLCRGB-A5	RGB LED 5 mm	1
BUZZER	HNB09A03	85dB Active (driven circuit included) Magnetic 3kHz	1
Miscellaneous
USB1	MicroXNJ	Micro-B SMD USB Connectors	1
F1	500mA	6V 500mA 100A 1A 0805 Resettable Fuses	1
H1,H2	B-2100S02P-A110	2.54 mm 2P pin headers	2
H3,H3,H3,H3	3.2 mm×7 mm screw	Screw hole 3.2 mm×7 mm	4
H4,H5,H6,H7,H8,H9	PZ254V-11-08P	2×4P 2.54 mm pin headers	6
H10	PZ254V-11-04P	2.54 mm 4P pin headers	1
H11,H12,H14	PZ254V-12-8P	2×4P 2.54 mm pin headers	3
SW1,SW2,SW3,SW4,SW5	TS3625A	Tactile Switches 3.65 mm 2.5 mm Rectangle button 50mA Brick nogging 6.1 mm SPST	5
SWD,SWD1	SWD	1×4P P=2.54mm Female Headers	2
X1	32.768kHz	MC-306 Crystal	1
Y1	8MHz	HC-49S Crystal	1