This project involves designing a versatile IoT sensor hub using the ESP32-WROOM-32E module. The main objective is to create a platform that enables seamless data collection and transmission from various environmental sensors over a WiFi network. The device will feature USB-C for power and data transfer, and will utilize on-board voltage regulation to ensure stable operation. A CH340C chip is employed for USB to serial conversion, facilitating easy programming and communication with a host computer. Key Features: Wireless Connectivity: Leverage the ESP32's built-in WiFi capabilities for real-time data transmission to cloud-based platforms or local servers. USB-C Interface: Utilize a modern USB-C connector for power and data transfer, providing flexibility and future-proofing the design. On-board Voltage Regulation: Include an AMS1117-3.3 voltage regulator to maintain a stable 3.3V output from the USB input, protecting sensitive components. Support for Multiple Sensors: Integrate various GPIOs to connect multiple sensor types ( temperature, humidity, air quality ) (temperature, humidity, air quality) for comprehensive environmental monitoring. Expandability: Design with additional headers for future expansion, enabling users to customize and extend the hub's capabilities with additional sensors or modules. Applications: Smart Home Automation: Integrating with home systems to monitor and respond to environmental changes. Environmental Monitoring: Providing data for ecological studies or urban environment monitoring. Industrial IoT: Enhancing systems within a factory or industrial setting to track conditions in real-time. With this setup, the device aims to be a robust and adaptable piece of technology, suitable for hobbyists, researchers, and developers interested in the expanding world of IoT.

The "LoST" Board is a Node that interfaces Industrial 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 TUSB8041 by Texas Instruments is a highly integrated four-port USB 3.0 hub controller designed to facilitate high-speed data transfers and power management in computer systems, docking stations, monitors, and set-top boxes. This component offers simultaneous SuperSpeed USB (5 Gbps), high-speed (480 Mbps), full-speed (12 Mbps), and low-speed (1.5 Mbps) data connections, ensuring backward compatibility with USB 2.0 and USB 1.x devices. Key features include multi-transaction translation with four transaction translators, asynchronous endpoint buffers for improved data management, and comprehensive battery charging support compliant with various standards including CDP, DCP, and Chinese Telecommunications Industry Standard YD/T 1591-2009. Flexible power management options are available, catering to both per-port and ganged power control configurations, alongside over-current protection mechanisms. The device also supports custom configurations via OTP ROM, serial EEPROM, or I2C/SMBus interfaces, enabling customization for vendor IDs, product IDs, port specifics, and string descriptors. Ease of integration is further enhanced with the ability for on-board and in-system OTP/EEPROM programming via the USB 2.0 upstream port, and the device requires no special drivers, operating seamlessly with any OS that supports USB. Packaged in a compact 64-pin QFN format, the TUSB8041 is offered in both commercial (0℃ to 70℃) and industrial temperature (-40℃ to 85℃) ranges, ensuring robust performance across diverse environmental conditions. With a single clock input requirement and comprehensive system resource support, the TUSB8041 is ideal for developers aiming to implement high-performance and reliable USB hubs in their designs.

Industrial 24 VDC input protection, distribution, regulated 12 V and 5 V outputs, diagnostics, test points, and selectable 0V-to-PE bonding. Schematic and BOM only; no PCB layout started.

The AO3442 is a 100V N-Channel MOSFET manufactured by Alpha & Omega Semiconductor, designed to deliver extremely low RDS(ON) through advanced trench MOSFET technology and a low resistance package. This component is ideal for applications such as boost converters, synchronous rectifiers for consumer electronics, telecom, industrial power supplies, and LED backlighting. The AO3442 features a drain-source voltage (VDS) of 100V, a continuous drain current (ID) of 1A at VGS=10V, and a maximum RDS(ON) of 630mΩ at VGS=10V and 720mΩ at VGS=4.5V. It is housed in a SOT23 package and operates efficiently with a maximum power dissipation of 1.4W at TA=25°C. The device also boasts a gate-source voltage (VGS) of up to +20V and a junction temperature range of -55°C to 150°C, making it robust for various high-performance applications.

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Industrial-grade RP2350B controller with W5500 Ethernet, 24V input power, isolated industrial I/O, RS485, USB hub, relay outputs, and robust connector protection for -40°C to +85°C consumer/industrial use.

The FDB1D7N10CL7 is an N-Channel Shielded Gate POWERTRENCH® MOSFET manufactured by ON Semiconductor. This advanced MOSFET leverages ON Semiconductor's POWERTRENCH process, incorporating Shielded Gate technology to deliver minimized on-state resistance and superior switching performance with a high-quality soft body diode. The component features a maximum drain-to-source voltage (VDS) of 100 V and can handle continuous drain currents up to 268 A at 25°C. It boasts a low RDS(on) value of 1.7 mΩ at a gate-to-source voltage (VGS) of 12 V and drain current (ID) of 100 A, making it highly efficient for power management applications. Key applications include industrial motor drives, power supplies, automation, battery-operated tools, solar inverters, and energy storage systems. The FDB1D7N10CL7 is housed in a robust D2PAK7 (TO-263 7 LD) package and is designed to withstand a wide range of operating temperatures from -55°C to +175°C.

Coconut power supply board is a power management board designed to deliver stable and reliable power supply to your industrial loads.

The LTC3109 from Linear Technology is a highly integrated DC/DC converter specifically designed for energy harvesting applications. It can operate from ultra-low input voltages as low as 30mV, utilizing a unique, proprietary auto-polarity architecture to function regardless of input polarity. The component is ideal for harvesting energy from thermoelectric generators (TEGs) and thermopiles, efficiently converting this energy to power remote sensors, wireless transmitters, and low-power devices. Key features include selectable output voltages of 2.35V, 3.3V, 4.1V, or 5V, a 2.2V low-dropout (LDO) regulator, a logic-controlled output, and an energy storage system to maintain operation during power interruptions. The LTC3109 is encapsulated in a small, 20-lead (4mm × 4mm) QFN or SSOP package, making it compact and suitable for space-constrained applications in HVAC systems, building automation, and industrial wireless sensing. Additionally, the power good indicator and the ability to use compact step-up transformers further enhance its suitability for low power, energy-harvesting systems.

Smart Wellhead Controller V1.1: ESP32 + LoRa Industrial IoT Node with Solar Power, Deep-Sleep Leak Sensing, and OLED HMI. Now upgraded with a solar charging and battery management stage featuring a TP4056/CN3791 charger IC, power-path switching, Li-ion battery protection, and integrated 3.3 V rail supply. #PowerBlock #SolarCharging #BMS

Wearable Industrial Safety Monitor — STM32C011 + ESP8266, IMU/environment/microphone sensing, RGB/vibration alerts, LiPo/AP7361 power, 70 mm × 50 mm 2-layer PCB with bottom GND plane.

Bidirectional DC-DC converter management system PCB for energy storage applications. The design targets bidirectional charge and discharge control, dynamic power regulation, energy optimization, and overload protection for storage systems. It integrates a control section with MCU-class supervision, 16-bit ADC measurement, PWM-based power-stage control, and industrial CAN/RS485 communication, while planning practical PCB partitioning for high-current power paths, mixed-signal control, and protected interfaces. Target conversion efficiency is 98% or higher, with CMOS-oriented high-integration design intent adapted into a manufacturable mixed-signal PCB implementation.

The inverter specs are Switching frequency: 200kHz Input voltage: 180VDC Output voltage: 120VAC Max power: 1500W I have designed an Inverter schematic for an uninterruptible power supply (UPS), Used an efficiency LCL topology filter to eliminate 3rd and 5th harmonics as induction motor is connected at load. The Inverter schematic that can convert 180VDC into 120VAC, which can be used in any household or industrial application. You can refer the BOM to check the MOSFET parts, drivers, and filter parameter values.

The inverter specs are Switching frequency: 200kHz Input voltage: 180VDC Output voltage: 120VAC Max power: 1500W I have designed an Inverter schematic for an uninterruptible power supply (UPS), Used an efficiency LCL topology filter to eliminate 3rd and 5th harmonics as induction motor is connected at load. The Inverter schematic that can convert 180VDC into 120VAC, which can be used in any household or industrial application. You can refer the BOM to check the MOSFET parts, drivers, and filter parameter values.

USB-powered ESP32-WROOM-32 industrial vibration and temperature monitoring sensor node with ADXL345 SPI accelerometer, DS18B20 1-Wire temperature sensor, SSD1306 I2C OLED, LEDs, buzzer, relay header, and 3.3V AMS1117 power supply.

The Samsung K4B2G1646F is a 2Gb DDR3L SDRAM memory component designed for high-speed performance, offering data rates up to 1866Mb/sec/pin. Available in a 96-ball FBGA package and organized as 128Mb x 16 I/Os x 8 banks, it is optimized for use in various applications requiring efficient data storage and retrieval. The device supports both 1.35V (DDR3L) and 1.5V (standard DDR3) power supplies, ensuring compatibility with a wide range of system requirements. Key features include an 8-bit pre-fetch architecture, programmable CAS latency, on-die termination (ODT), and internal self-calibration through the ZQ pin. The component also adheres to JEDEC standards and is compliant with RoHS, ensuring it is free of lead and halogen. Suitable for commercial and industrial temperature ranges, the K4B2G1646F offers robust performance for various demanding applications.

Industrial 415V 3-phase motor control interface with STM32 command logic, SIMCom A7672S 4G SMS control, isolated relay driver, 12V input power, and 150x100mm 2-layer PCB constraints.

The AON7292 from Alpha & Omega Semiconductor is a high-performance, 100V N-Channel MOSFET utilizing the latest Trench Power AlphaMOS (aMOS MV) technology. This component is optimized for fast-switching applications and features very low RDS(ON) values, with <24mΩ at VGS=10V and <32mΩ at VGS=4.5V, making it ideal for synchronous rectification in DC/DC and AC/DC converters, as well as isolated DC/DC converters in telecom and industrial applications. The AON7292 is housed in a compact DFN 3.3×3.3 package and complies with RoHS and Halogen-Free standards. Key specifications include a continuous drain current of 23A at Tc=25°C, a pulsed drain current of 45A, and a maximum power dissipation of 28W at Tc=25°C. The component also boasts low gate charge characteristics, with a total gate charge of 17nC at VGS=10V, ensuring efficient operation in high-speed switching environments. Additionally, it has been rigorously tested for Unclamped Inductive Switching (UIS) and gate resistance, ensuring reliability and performance in demanding applications.

The TDK FG series of Multilayer Ceramic Capacitors (MLCC) with dipped radial leads are designed for commercial-grade applications, offering a halogen-free and RoHS compliant solution. These capacitors are available with lead pitches of 5.0mm and 2.5mm, and come in various dimensions ranging from 4.0x5.5mm to 8.5x11.0mm. The FG series includes types such as FG28, FG24, FG26, FG20, FG22, FG23 for the 5.0mm lead pitch, and FG18, FG14, FG16, FG11 for the 2.5mm lead pitch. These capacitors feature a voltage rating of 10V to 630V and a capacitance range from 1pF to 47uF. They are suitable for applications including noise reduction in motors, bypass and smoothing capacitors for switching power sources, snubber circuits, and PFC input filters. The components are characterized by various temperature coefficients including C0G, X5R, X7R, X7S, and X7T, with operating temperatures ranging from -55°C to +125°C. The FG series is available in both bulk and taped packaging styles, designed to meet the needs of general electronic equipment such as AV equipment, telecommunications, home appliances, and industrial robots.

The Texas Instruments DAC3484 is a highly integrated, low-power, quad-channel, 16-bit digital-to-analog converter (DAC) capable of sample rates up to 1.25 GSPS. This component is designed to simplify complex transmit architectures in telecommunications and broadcast systems, offering features such as 2x to 16x digital interpolation filters with more than 90 dB of stop-band attenuation, which eases data interface and reconstruction filter design. Additionally, the DAC3484 includes independent complex mixers with fine and coarse mixing options for flexible carrier placement, a low jitter clock multiplying phase-locked loop (PLL) for simplified clocking, and digital Quadrature Modulator Correction (QMC) for IQ compensation in direct up-conversion applications. The 16-bit LVDS data bus, equipped with on-chip termination, a FIFO, data pattern checker, and parity test, along with multiple device synchronization capability, addresses the needs for high speed and precision in applications such as cellular base stations, diversity transmitters, and wideband communications. Offering options for very low power consumption and available in both 88-pin WQFN and 196-ball NFBGA packaging options, the DAC3484 is characterized for operation across the industrial temperature range of -40℃ to 85°C, making it a versatile choice for systems designers requiring high performance, multi-channel DAC solutions.