Functionally similar multi-channel electronic lock controller with 24 V lock outputs, 3.3 V logic, MCU control, shift-register expansion, CAN interface, test/reset controls, and protected solenoid driver stages.

Compact USB dongle PCB for Midea air conditioners based on the mideahvac-dongle architecture, using an ESP32-C6 module, 5V UART level shifting, WS2812B status LED, USB-A appliance connector, and USB-C programming/power.

Low-voltage logic-only CERILUME Phase 1 LED controller using an Arduino Nano ESP32 plug-in module, 5V logic level shifting for WS2812/SK6812 data, microphone input header, and labeled test pads. LED power distribution and high-current switching are intentionally out of scope.

Production-ready ESP32-DEVKITC-32UE festival carousel horse LED controller schematic with organized Power, ESP32 + Level Shifter + LEDs, Inputs, and DMX + OLED blocks.

4-layer dual PCA9685 servo controller with Raspberry Pi 5, STM32 Nucleo, TXS0102 I2C level shifting, 6.0V/20A servo rail, and 5.1V logic rail.

4-layer dual PCA9685 servo controller for Raspberry Pi 5 and STM32 Nucleo with TXS0102 I2C level shifting, 6V/20A servo power distribution, OE safety disable, and VSense monitoring.

Jerky Robot V3 100 mm × 152 mm 2-layer control board with ESP32-S3 and Arduino Nano sockets, screw-terminal I/O, BSS138 UART level shifting, PC817 sensor isolation, optional HX711 interface, status LEDs, test points, top-side component placement, and bottom GND fill for JLCPCB fabrication.

USB-C Powered Arduino Nano ESP32 Soil Monitor with Protected 5 V Rail, Integrated eFuse (OVP/UVLO), 3.3 V Synchronous Buck, SPI Level Shifting, and Optimized 4-Layer Layout

Pocket Soundbox – LiPo-Powered Cellular I2S MP3 Audio Player (SIMCom A7670E-LASE, Nano-SIM, I2S MP3 to PCM5101A DAC, FM8002E Amp, 1.8V↔3.3V UART/PWRKEY Level Shifting, Remapped J4, MP2315 3.3V Power Path, USB-C ESD/TVS) with power ON/OFF long-press control via SW2 and Q2 featuring pull-ups, RC debounce, and PFET safety clamp (#Cellular #I2S #LiPo #Audio #powerbutton #debounce #PFET)

Dual-MCU Board with SWD Level Shifting Between ATSAMD11D14A and nRF54L15

R2 w Thread changes: -Moving to Letter Modules for ease of design -Adding MGM210L for Matter on Thread On/Off and intensity control -Shifted A and R letters closer to fix Kerning -Optional: Add unpopulated AA Battery Holder for battery option R1 changes: -Changed LED part to Red LEDs -adjusted resistor value of buck converter -Changed source for USB-C Connector -Removed exposed soldermask on buck converter with negative soldermask expansion -Order with black soldermask Modified by markwu2001: - Adjustable Brightness, - 85-90% Drive Efficiency - <5W Operation (Can use 5V 1A Plug) This project can be purchased from LCSC Original Description: Daddy's second circuit board. A sign to let my wife know when I'm on a call. Activates with a slide switch and is powered by USB-C. #template #arduino-matter

ESP32 /eMMC Integration with Bidirectional Level Shifting Project Overview: This project aims to integrate an ESP32 microcontroller with an eMMC (embedded Multi Media Card) storage module to create a robust data processing and storage solution. The system utilizes bidirectional level shifting to ensure seamless communication between the 3.3V logic of the ESP32 and the 1.8V logic of the eMMC, enabling efficient data handling and processing. Objectives: Data Storage and Processing: Leverage the high-speed capabilities of the eMMC for data storage while offloading processing tasks from the ESP32 to enhance overall system performance. Voltage Level Compatibility: Implement a bidirectional level shifting solution to facilitate communication between the ESP32 and eMMC, ensuring signal integrity and compatibility across different voltage levels. Modular Design: Create a modular and scalable design that can be easily adapted for various applications, including IoT devices, data logging systems, and embedded applications. Key Components: ESP32 Microcontroller: A powerful microcontroller with integrated Wi-Fi and Bluetooth capabilities, ideal for IoT applications. eMMC Storage Module: A high-speed storage solution that provides ample memory for data-intensive applications. Bidirectional Level Shifter: A 20-channel level shifter (74LVC4245 and TXB0104D) to convert signals between 1.8V and 3.3V, ensuring reliable communication between the ESP32 and eMMC. Power Management: Utilize a MIC5205 LDO voltage regulator to step down the 3.3V supply to 1.8V for the eMMC, ensuring stable power delivery. Implementation Steps: Circuit Design: Design the circuit schematic, including connections for the ESP32, eMMC, level shifter, and power management components. PCB Layout: Create a PCB layout that optimizes trace lengths for high-speed signals, ensuring proper length matching and minimizing noise. Firmware Development: Develop firmware for the ESP32 to handle data reading, writing, and processing tasks, as well as managing communication with the eMMC. Testing and Validation: Conduct thorough testing to validate the functionality of the system, ensuring reliable data transfer and processing capabilities. Expected Outcomes: A fully functional system that demonstrates the integration of the ESP32 with eMMC storage, showcasing efficient data handling and processing. A modular design that can be adapted for various applications, providing a foundation for future projects in IoT and embedded systems.

The NTS4001N and NVS4001N are single N-Channel, small signal MOSFETs from ON Semiconductor, housed in a compact SC-70/SOT-323 package. These components are designed for applications requiring efficient low-side load switching, such as Li-Ion battery-supplied devices including cell phones, PDAs, and digital still cameras, as well as for use in buck converters and level shifters. Featuring a maximum drain-to-source voltage (VDSS) of 30 V and a continuous drain current (ID) of 270 mA at 25°C, these MOSFETs are optimized for fast switching with low gate charge. The gate-to-source voltage (VGS) can withstand up to ±20 V, and the devices are ESD protected and AEC-Q101 qualified, making them suitable for automotive applications. The NTS4001N and NVS4001N are also Pb-Free and RoHS compliant, ensuring environmental compliance. With a typical RDS(on) of 1.0 Ω at VGS = 4.0 V and 1.5 Ω at VGS = 2.5 V, these MOSFETs offer reliable performance in a small footprint, 30% smaller than the TSOP-6 package.

The NTK3134N from ON Semiconductor is a high-performance, single N-Channel MOSFET designed for power and interface switching applications in ultra-small portable electronics. Packaged in a compact SOT-723 form factor, which is 44% smaller in footprint and 38% thinner than the SC89, this MOSFET features a low RDS(on) for efficient load switching. It operates at low logic level gate drives, with a maximum drain-to-source voltage (VDSS) of 20V and a continuous drain current (ID) of up to 890mA at 25°C. The component supports pulsed drain currents up to 1.8A and boasts ESD protection. The NTK3134N is also Pb-Free, Halogen Free/BFR Free, and RoHS Compliant, making it an environmentally friendly choice for designers. Key applications include load/power switching, interface switching, logic level shifting, and battery management.

This project is a IR camera sensor module based on the TSL25911FN sensor, equipped with I2C communication technique. The module features a 3.3V regulator, I2C level shifter, LEDs, capacitors, resistors, and JST connectors for easy interfacing. #Module #Template #sensor #IR #reusable #module #industrialsensing #sublayout

The NTJD4001N and NVTJD4001N from ON Semiconductor are dual N-Channel MOSFETs designed for small signal applications. Encased in a compact SC-88 (SOT-363) package, these MOSFETs offer a drain-to-source voltage (VDSS) of 30 V and a continuous drain current (ID) of up to 250 mA at 25°C. Key features include low gate charge for fast switching, ESD-protected gates, and AEC-Q101 qualification, making them suitable for use in automotive environments. These MOSFETs are ideal for applications such as low side load switches, Li-Ion battery-powered devices (e.g., cell phones, PDAs, DSCs), buck converters, and level shifters. The devices are RoHS compliant and Pb-free, ensuring environmental compliance and reliability. The thermal resistance from junction to ambient is 458°C/W, and the devices can operate within a temperature range of -55°C to 150°C. The NTJD4001N and NVTJD4001N also feature low RDS(on) values, ensuring efficient performance in various electronic circuits.

Cable Index Shifting Electronic Derailleur. The first version just uses a linear actuator because I suck at ME design. I imagine it would be pretty easy to build a reeling one with positional feedback.