KiCad PCB Design Engineer Required – Custom 4G/2G GPS Tracker Hardware Modification
Budget / Salary₹1,500–12,500
TypeFreelance project
LocationRemote
Posted57 minutes ago
We are looking for an experienced electronics hardware and PCB design engineer to modify an existing open-source GPS tracker design using KiCad.
The current design uses an ESP32-S3 microcontroller and SIM868 GSM/GNSS module. We want to customize it for commercial vehicle tracking applications.
Required Modifications
Vehicle Power Input
Support 9–36V DC input.
Include reverse-polarity, overvoltage and transient protection.
Design suitable DC-DC power regulation for GSM current peaks.
Ignition Detection
Support 9–36V ACC ignition input.
Detect ignition ON/OFF through an ESP32 GPIO.
Include input protection, filtering and hysteresis.
Backup Battery
Support a 3.7V, 500 mAh single-cell Li-ion battery.
Automatic charging when external power is available.
Automatic switchover when vehicle power is disconnected.
Battery protection and low-battery monitoring.
External Relay Control
Switched-ground output using a MOSFET.
Compatible with external 12V/24V relay coils.
Include appropriate electrical protection.
Existing Hardware
Retain ESP32-S3 and SIM868.
Retain GSM and GNSS antenna connections.
Review and optimize the existing circuit.
Minimize PCB size and BOM cost.
Required Deliverables
Complete modified KiCad schematic.
Updated PCB layout.
KiCad project and source files.
Gerber and drill files.
BOM with manufacturer part numbers.
Pick-and-place files.
Electrical rule check (ERC) and design rule check (DRC) reports.
Power-path calculations and design notes.
Manufacturing-ready design documentation.
Preferred Experience
GSM/GNSS tracker hardware design.
Automotive 12V/24V electronics.
Li-ion battery charging and power-path management.
ESP32 and SIMCom modules.
KiCad PCB design and manufacturing.
Important: We will provide the existing KiCad source files to the selected freelancer. The engineer must review the existing design and validate all modifications before delivering the final manufacturing files.
The current design uses an ESP32-S3 microcontroller and SIM868 GSM/GNSS module. We want to customize it for commercial vehicle tracking applications.
Required Modifications
Vehicle Power Input
Support 9–36V DC input.
Include reverse-polarity, overvoltage and transient protection.
Design suitable DC-DC power regulation for GSM current peaks.
Ignition Detection
Support 9–36V ACC ignition input.
Detect ignition ON/OFF through an ESP32 GPIO.
Include input protection, filtering and hysteresis.
Backup Battery
Support a 3.7V, 500 mAh single-cell Li-ion battery.
Automatic charging when external power is available.
Automatic switchover when vehicle power is disconnected.
Battery protection and low-battery monitoring.
External Relay Control
Switched-ground output using a MOSFET.
Compatible with external 12V/24V relay coils.
Include appropriate electrical protection.
Existing Hardware
Retain ESP32-S3 and SIM868.
Retain GSM and GNSS antenna connections.
Review and optimize the existing circuit.
Minimize PCB size and BOM cost.
Required Deliverables
Complete modified KiCad schematic.
Updated PCB layout.
KiCad project and source files.
Gerber and drill files.
BOM with manufacturer part numbers.
Pick-and-place files.
Electrical rule check (ERC) and design rule check (DRC) reports.
Power-path calculations and design notes.
Manufacturing-ready design documentation.
Preferred Experience
GSM/GNSS tracker hardware design.
Automotive 12V/24V electronics.
Li-ion battery charging and power-path management.
ESP32 and SIMCom modules.
KiCad PCB design and manufacturing.
Important: We will provide the existing KiCad source files to the selected freelancer. The engineer must review the existing design and validate all modifications before delivering the final manufacturing files.
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