This design implements a USB security token powered by an STM32 microcontroller. The device is engineered for compactness and efficient PCB integration while ensuring robust security features. Key elements of the design include: - **Microcontroller Core:** A STM32F103T8U6 serves as the primary processing unit, handling USB communication and security protocols. - **USB Interface:** A USB-A plug provides connectivity to the host. Dedicated net portals ensure proper routing of the VBUS, D+, D–, and ground signals. - **Power Regulation:** A low-dropout regulator supplies a stable 3.3V operating voltage, ensuring low noise and proper current supply to the microcontroller and peripherals. - **Signal Conditioning and EMI Filtering:** An EMI filter is used to maintain signal integrity and reduce interference while preserving the security token’s functionality. - **Synchronous Elements:** A ceramic resonator is incorporated to provide a precise clock source for USB data transfer and microcontroller operations. - **Additional Components:** Surface-mount resistors, capacitors, and LED indicators are deployed to ensure proper conditioning, decoupling, and status feedback. Their compact 0402 packages facilitate a highly integrated design. - **Connectivity and Net Portals:** Custom net portals are used throughout the schematic to streamline connectivity and PCB layout, keeping the design modular and easy to modify. This USB security token is designed with industry-standard components and robust connectivity to ensure secure, reliable operation in portable security applications. #USBToken #STM32 #PCBDesign #SecurityTechnology #PortableSecurity #Microcontrollers #USBInterface #PowerRegulation #EMIProtection #CompactDesign

This project designs a Linux Single Board Computer using STM32MP157FAC1, featuring DDR memory, a power management IC, USB and SD card interfaces, and essential user controls, aimed at versatile embedded applications.

Portable Audio DSP project utilizing multiple ICs, capacitors, resistors, and LEDs for advanced audio processing and control. Designed for embedded audio applications with ESP32, ADC, DAC, and interface components. #audioDevices #DSP #ADC #audio #DAC

This project is designed to measure water level of two tanks using ultrasonic sensors interfaced with the ESP32 microcontroller. The design leverages the processing power and wireless connectivity of the ESP32 to accurately monitor water levels and support automated water management processes. Key components include two ultrasonic sensors for precise distance measurement, robust voltage regulation using an LM2596 buck converter, and reliable power management circuits. Its modular design approach facilitates easy expansion and integration with other systems, making it an ideal solution for both DIY enthusiasts and professionals in automated fluid control and IoT applications. Firmware: https://github.com/jharwinbarrozo/ESP32-Dual-Ultrasonic-Water-Level-Monitoring-System #ESP32 #UltrasonicSensor #WaterLevelSensor #LM2596 #VoltageRegulator #ModularDesign #IoT #DIYProjects #ElectronicsDesign #automation

10/100 Base-T/TX PHY Ethernet controller that supports PoE with SPI Interface. Based on W5500. Can be used as PoE injector. #project #referenceDesign #template #w5500 #PoE #EtherNet #RJ5

This Weather Station Logger project employs the versatile ESP32 microcontroller board, integrated with an SD card slot for data storage. It features a USB interface for easy programming and is efficiently powered by a single 18650 battery, complete with a protection circuit for safe operation. #iot #esp32 #lora #weather #edgecomputing

This is a reference design for TJA1059TKJ Dual high-speed CAN transceiver with Standby mode. It offers advanced features, such as wake-up capability and high-speed data rates, making it suitable for automotive and industrial applications. #MCP25612FD #CANbus #transceiver #highspeed #automotive #referenceDesign #project #CANbus #interface #transceiverCircuit #TJA1059TKJ #referenceDesign #canbus #nxp #template #reference-design

The LoST 3296 board features an Low Power STM32, an RFM95 Module for LoRA connectivity and a connector to interface different sensors. You can hook up a UART module, I2C module and a module using the RS485. The board is powered by the USB-C port

Reference design for PCM5102A 2VRMS DirectPath™, 112dB Audio Stereo DAC with 32-bit, 384kHz PCM Interface #project-template #DAC #audio #project

A PCB that interfaces with a smart shoe insole

This is the SparkFun USB to Serial Breakout for the FT232RL, a small board with a built in USB to serial UART interface. This little breakout is built around the FT232RL IC from FTDI, with an internal oscillator, EEPROM, and a 28-pin SSOP package this is a serious little chip.

It is a board based on STM32L4 with a built-in ethernet IC W5500 that allows you to create IoT projects based on the modern ARM Cortex®-M4 core. A connector with SWD interface and USB C for communication are provided for the firmware #IoT #ARM #STM #Ethernet #W5500 #IC #project

I want to create a standard interface from my PCBs to my test equipment. My equipment: PSU: Rigol DP832 Scope: Siglent SDS 1202X-E WaveGen: Siglent SDG810 Logic Analyzer: DSLogic Plus 400MHz VNA: NanoVNA V2 6 scope channels (4 1X, 2 10X) 8 Logic Analyzer channels 1 Wavegen channel 4 Power Nets ( 2 pins each) (tie power nets to oscilloscope inputs) #template #testing

The Texas Instruments MSP430FR604x and MSP430FR603x family comprises highly integrated ultrasonic sensing and measurement system-on-chips (SoCs) designed specifically for water and heat metering applications. The featured components, including MSP430FR6047, MSP430FR60471, MSP430FR6045, MSP430FR6037, MSP430FR60371, and MSP430FR6035, deliver best-in-class ultrasonic water flow measurement with ultra-low power consumption. These microcontrollers excel with an active mode current consumption of approximately 120 µA/MHz and a standby mode power draw as low as 450 nA with a real-time clock (RTC) enabled. Key functionalities include a high-precision differential time-of-flight (dTOF) accuracy of less than 25 ps, integrated analog front-end, programmable pulse generation (PPG), and an analog comparator. They also interface directly with standard ultrasonic sensors up to 2.5 MHz and feature up to 256KB FRAM, robust RAM options, and integrated LCD drivers for up to 264 segments. The embedded low-energy accelerator (LEA) enhances digital signal processing capabilities, making these components ideal for battery-powered metering solutions. Peripherals include multiple enhanced serial communication interfaces, high-performance ADCs, DMA controllers, and a suite of timers and encryption modules. These features combine to offer a powerful solution for high-accuracy, low-cost, and ultra-low-power metering applications.

Integrated 4-layer ROV main control board for 48 V tether-powered underwater vehicle, with onboard 48 V to 12 V/5 V/3.3 V electronics power conversion, STM32F407 control, Jetson Nano interface, sensors, ESC PWM signal outputs, RS485/Ethernet tether interfaces, and conformal-coated underwater-enclosure constraints.

This compact breakout board makes it easy to add high-quality audio output to your microcontroller projects using the MAX98357A/B Class D audio amplifier. Perfect for Arduino, ESP32, Raspberry Pi, or any microcontroller with I2S output capabilities. Features High-Performance Audio: Delivers Class AB audio quality with Class D efficiency (92% efficient at 1W) Powerful Output: 3.2W into 4Ω speakers at 5V supply Clean Sound: Low distortion (0.013% THD+N at 1kHz) Wide Supply Range: Operates from 2.5V to 5.5V Simplified I2S Interface: No MCLK required, just BCLK, LRCLK, and DIN Selectable Gain: Solder jumpers for easy gain selection (3dB, 6dB, 9dB, 12dB, or 15dB) Channel Selection: Configure for left, right, or combined (mono) output Filterless Design: No need for external output filtering components Compact Form Factor: Minimal board space with optimized layout Applications Smart speakers and voice assistants Portable audio devices IoT audio projects Gaming devices and sound effects Educational audio projects Digital instrument amplification The FLUX MAX98357 breakout board requires only three I/O pins plus power, making it the perfect audio solution for projects where simplicity and sound quality matter.

The "Green Dot 2040E5" Board is a Node that interfaces RS485 Sensor probes and can log information to the cloud using LoRa Connectivity. It uses the XIAO RP2040 and the LoRa-E5 (STM32WLE5JC) modules from Seeed Studio to do its magic. It also has amazing power management capabilities (Solar charging, Battery protection, etc) that make it very useful for IoT applications #Seeed #XIOA #LoRa #RP2040 #IoT

The "Green Dot 2040E5" Board is a Node that interfaces RS485 Sensor probes and can log information to the cloud using LoRa Connectivity. It uses the XIAO RP2040 and the LoRa-E5 (STM32WLE5JC) modules from Seeed Studio to do its magic. It also has amazing power management capabilities (Solar charging, Battery protection, etc) that make it very useful for IoT applications #Seeed #XIOA #LoRa #RP2040 #IoT

A PCB that interfaces with a smart shoe insole

This project designs a Linux Single Board Computer using STM32MP157FAC1, featuring DDR memory, a power management IC, USB and SD card interfaces, and essential user controls, aimed at versatile embedded applications.

3.3 V-powered pH and ORP probe interface using an ADS1115 module, MCP6002 through-hole buffers, and DS18B20 temperature sensing. External ESP32 connection is through one 5-pin header carrying 3V3, GND, SDA, SCL, and DQ; ADS1115 ADDR is fixed locally and ALERT is unused.

OBD2 to UART interface dev board. Alternative to deprecated ELM237 Chipset. Documentation: - Power tree: https://drive.google.com/file/d/1oG5_56AuaiLtG3buUaOyhg63TMySnYF3/view?usp=sharing

Smart Thermostat design using an ESP32 module for WiFi connectivity and a BME680 sensor for environmental monitoring. The user interface includes an E-ink display and an encoder for settings adjustment. Power: USB and Battery Movement sensor

Portable Audio DSP project utilizing multiple ICs, capacitors, resistors, and LEDs for advanced audio processing and control. Designed for embedded audio applications with ESP32, ADC, DAC, and interface components. #DSP #ADC #audio #DAC

The Smart Hospital Bed is designed to enhance the care and comfort of patients with limited mobility by streamlining repositioning and maintaining detailed health records. It features automated repositioning options via an intuitive control interface, along with a rotating mechanism that allows the bed to transform into a chair for better comfort and adaptability. Additionally, its health data recording system provides real-time data base record on vital signs and posture, accessible remotely by healthcare providers helps them with decision making.