PCB Design with Sensors and Rechargeable Battery
Publicada el 2026-07-24
Descripción de la oferta
Compact Battery-Powered Sensor PCB Design (ESP32-S3) — KiCad Preferred I'm looking for an experienced PCB designer to develop a compact, battery-powered PCB, ideally in KiCad (Altium acceptable). Core Components ESP32-S3-WROOM-1-N16R8 microcontroller 4-wire full-bridge load cell interface (HX711 or equivalent) SHT31 temperature and humidity sensor (I²C) 3-axis accelerometer (I²C) — designer's choice of part (e.g. LIS3DH, ADXL345) unless you have a preference, please propose one Rechargeable 3.7V LiPo battery, ~1000mAh, connected via JST-PH connector USB-C charging circuit with integrated battery management IC (overcharge/overdischarge/overcurrent protection required) 3.3V power regulation Power on/off switch Connector for an addressable RGB LED strip (WS2812B), sized for 10–30 LEDs — please size the power rail/connector accordingly, and note if a separate 5V boost is needed vs. running off battery voltage Necessary decoupling, protection, and supporting circuitry for reliable operation ESD protection on USB-C and battery input lines Electrical Notes Charging current target: ~500mA (open to designer recommendation based on battery capacity) HX711 sample rate: standard 10SPS is fine unless designer recommends otherwise Please recommend 2-layer vs. 4-layer stackup based on RF performance (ESP32-S3 antenna) and routing density within the board constraints below — will consider either depending on cost tradeoff Antenna keep out for the WROOM-1 module must be respected in placement. Project requires IoT with ESP32-S3 Mechanical Requirements Maximum PCB size: 44mm × 44mm Must fit within a 46mm diameter circular enclosure Small extension from one side to accommodate a USB-C receptacle Four mounting holes for screws Component placement optimized for available board space and manufacturability Interfaces / Access UART or USB-C native (ESP32-S3 has native USB) for programming/debug Boot and reset buttons accessible Silkscreen labeling on all connectors and test points Connector pitch/part numbers: JST-PH for battery; designer's recommendation for load cell (4-wire) and LED strip connectors — please specify chosen part numbers in the BOM Project Type This is a prototype build — not initial production, but design should be clean enough to scale to small-batch production later without a full redesign Deliverables Complete KiCad project (preferred) Schematic PCB layout Bill of Materials (BOM) with part numbers and suppliers (JLCPCB or PCBWay compatible parts preferred) Gerber files Pick-and-place file (assembly-ready format for JLCPCB or PCBWay — please specify which) Design must pass ERC and DRC checks and be suitable for fabrication Project Logistics All design files and IP to be transferred to me upon final payment Please share examples of previous PCB designs, particularly projects involving ESP32, battery-powered electronics, USB-C power delivery, or multi-sensor integration
Skills
Fuente original: freelancer