​JOB TITLE: Schematic and PCB Design for Battery-Powered LoRa Node (RA-09H + Boost + H-Bridge)

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​PROJECT DESCRIPTION: We are looking for an experienced PCB hardware designer to develop a production-ready schematic and 2-layer PCB layout for a custom battery-powered LoRa node. TOTAL PROJECT DEADLINE: 5 to 7 days from project kickoff. ​CIRCUIT ARCHITECTURE & KEY COMPONENTS: ​ / RF: Ai-Thinker RA-09H LoRa module. 2 .​Power Supply: ​ * HT7333A low-quiescent LDO (3.3V rail to the RA-09H). * ​SX1308 step-up boost converter (Battery to 12V). * ​MOSFET switch to turn the 12V rail completely on/off via MCU to save battery. ​ 3 .Actuator Driver: RZ7899 H-bridge motor/actuator driver (12V). ​ 4 .Battery Monitoring: Resistor voltage divider linked to RA-09H ADC. ​ 5 .Connectors: Battery input, motor output, programming header, basic protection. 6 .Testing: Dedicated test points and exp...

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