Modern SMD recreation of the Nuova Elettronica LX750 analog curve tracer, with analog X/Y acquisition for RP2040 processing and a 4-inch SPI TFT display interface.

An aes3 usb Interface.

KiCad schematic reconstruction for YachtWave Rev B: ESP32-S3 controller with power input, USB-C, SD card, CAN bus interface, indicators, and protection circuitry.

Portable Linux cyberdeck based on RK3588S2 with LPDDR4x memory, LTE/GNSS M.2, LoRa, USB-C, USB-A 3.0, HDMI, display/keyboard interface, speaker, and battery power.

BLE smart espresso scale with USB-C power, single-cell Li-ion battery charging, load-cell measurement, local data logging, and an integrated segment/display interface.

Battery-powered smart espresso scale with BLE/WiFi-capable MCU, load-cell measurement, OLED interface, USB-C charging, and debug/programming access.

4S1P Li-ion/LiPo battery interface board with XT60 high-current output, JST-XH 5-pin balance connector, exposed weld/contact pads, and 4 oz 2-layer high-current copper pours for 60 A nominal / 100 A pulse operation.

ESP32-S3 carrier board with USB-C 5V power, BNO085 IMU support, GPS module interface, temperature sensing, and a single brushed DC motor driver carrier interface.

Arduino Nano-based DCS-BIOS RS-485 interface module using a MAX487CPA+ transceiver and two RJ45 sockets for bus daisy-chaining.

Raspberry Pi 4 based cyberdeck MIDI controller with a rugged portable interface, tactile controls, display support, USB MIDI, and optional standalone power/interface expansion.

Vibe-wared 5 V 10×10 monochrome LED matrix with 10 mm pitch, cascaded constant-current serial drivers, multiplexed row switching, and an external controller interface.

Battery-powered ESP32-S3 LoRa ePaper sensor board with SHT41 environmental sensing, LiPo charging/fuel gauge, 5V input detection, and a 4.2 inch 300x400 b&w ePaper interface in an 85 x 60 mm low-profile PCB.

Universal PWM Interface Module: 12 V automotive-input board for configurable ECU PWM input conditioning and open-collector fan-module output, with TVS/reverse-polarity/PTC protection, 5 V buck, 3.3 V LDO, selectable pull-up rails, inversion jumper, status LEDs, test pads, mounting holes, and DT13-08PA connector placeholder.

8-channel USB Audio Class 2.0 line-input interface using AK5558 ADC and XMOS XU208 USB bridge

WiFi-enabled ultrasonic water flow meter interface for 3/4 inch PVC pipe with USB-C power, ESP32 WiFi, 12V RS485 sensor supply, and protected sensor interface.

WiFi-enabled ultrasonic water flow meter interface for 3/4 inch PVC pipe with USB-C power, ESP32 WiFi, 12V RS485 sensor supply, and protected sensor interface.

Industrial ESP32-S3 master gateway with Ethernet (W5500), LoRa 433 MHz, microSD storage, RTC, USB-UART console/debug interface (CP2102N), and isolated RS485 ports using ADM2587 transceivers. The design includes ESP32-S3-WROOM-1-N16R2 as the main controller, W5500 Ethernet, LoRa antenna interface, microSD connector, RTC circuitry, CP2102N USB-to-UART programming/debug console, SC16IS752 UART expanders, isolated RS485 channels, power regulation, ESD/surge protection, connectors, and mounting holes. Cellular/BG95/SIM functionality and true RS232 console hardware are not included; J1 is used only as the microSD card connector.

Four-channel electrochemical gas sensor signal-conditioning module based on the TI LMP91000EVM architecture, with shared I2C, per-channel SPI ADCs, 2.5V reference, sensor headers, and STM32F767ZI interface.

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.

Arduino Mega 2560 sensor/actuator interface shield for a firefighting differential robot with labeled connectors, onboard IR receiver, buzzer, MPU6050 header, battery VIN protection, battery sensing, LED outputs, and fan MOSFET control.

USB4 external NVMe SSD enclosure PCB targeting an ASM2464PDX-class USB4 40 Gbps device controller with PCIe Gen4 x4 downstream M.2 NVMe interface, USB-C upstream port, power management, ESD protection, and controlled-impedance layout constraints.

Arduino Nano-style ATmega328P breakout with CH340G USB-to-serial interface, USB power input, reset/clock support, and programming headers.

2-layer mezzanine HAT for LILYGO T-SIM7600G-H R2 adding dual CAN, protected 12V-to-5V power, and vehicle connector interface.

Minimal ESP32 and PC817 optocoupler schematic for an isolated WiFi-controlled PC motherboard power-switch interface.

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.