ESP32 Power Control PCB Design
Budget: $30 – $250 USD
PCB Design Project — Must Be Completed in DipTrace
We are seeking an experienced PCB designer who must use DipTrace for both schematic capture and PCB layout. The final files must be delivered in native DipTrace formats (.dch and .pcb), along with Gerbers and BOM.
Scope of Work:
The project is to design a compact, reliable PCB based around the ESP32-WROOM module with integrated power management, sensor input, real-time clock, and relay control.
Key Features Required:
Microcontroller: ESP32-WROOM module
USB Interface: CP2102 USB-to-Serial bridge with Micro-USB connector
Primary Power Conversion:
Buck converter to step down 12–24VDC input to 5VDC (supporting up to 700mA load)
Linear voltage regulator to provide a stable 3.3VDC supply for the ESP32
Secondary Power Conversion:
Buck converter to step down 24VDC to 12VDC at 5A output for external devices
Real-Time Clock: Integration of a DS3231 RTC chip
Temperature Sensor Interface: Connection for DS18B20 temperature sensor
Relay Control Output:
Output through a 2N2222 NPN transistor to drive a relay
Automatic Programming Support:
Include proper pull-up and pull-down resistors:
10kΩ pull-up on EN (RESET) pin
10kΩ pull-down on GPIO0
Correct connection of CP2102 DTR and RTS lines to ESP32 GPIO0 and EN via 100nF capacitors for automatic sketch upload without manual BOOT/RESET button presses
Component Size Requirements:
No components smaller than 0805/2012
Deliverables:
Schematic (.dch DipTrace file)
PCB Layout (.pcb DipTrace file)
Manufacturing-ready Gerber files
Complete Bill of Materials (BOM) with suggested part numbers
Design notes, especially for thermal management and high-current handling
Important Design Considerations:
Clean power distribution and voltage domain separation
Proper copper thickness and trace widths for 5A high-current paths
Low-EMI PCB layout techniques around switching converters and ESP32
Separate analog and digital grounds where necessary
Logical connector placement for easy wiring
Reliable automatic programming circuit
Preferred Qualifications:
Proven experience with ESP32-WROOM designs
Skilled with DipTrace schematic and PCB layout tools
Familiarity with CP2102 USB bridge circuits
Experience designing mixed-voltage (12V/5V/3.3V) systems
Good understanding of high-current and thermal design in compact PCBs
Timeline:
Project is ready to start immediately. Please submit your estimated turnaround time with your proposal.
We are seeking an experienced PCB designer who must use DipTrace for both schematic capture and PCB layout. The final files must be delivered in native DipTrace formats (.dch and .pcb), along with Gerbers and BOM.
Scope of Work:
The project is to design a compact, reliable PCB based around the ESP32-WROOM module with integrated power management, sensor input, real-time clock, and relay control.
Key Features Required:
Microcontroller: ESP32-WROOM module
USB Interface: CP2102 USB-to-Serial bridge with Micro-USB connector
Primary Power Conversion:
Buck converter to step down 12–24VDC input to 5VDC (supporting up to 700mA load)
Linear voltage regulator to provide a stable 3.3VDC supply for the ESP32
Secondary Power Conversion:
Buck converter to step down 24VDC to 12VDC at 5A output for external devices
Real-Time Clock: Integration of a DS3231 RTC chip
Temperature Sensor Interface: Connection for DS18B20 temperature sensor
Relay Control Output:
Output through a 2N2222 NPN transistor to drive a relay
Automatic Programming Support:
Include proper pull-up and pull-down resistors:
10kΩ pull-up on EN (RESET) pin
10kΩ pull-down on GPIO0
Correct connection of CP2102 DTR and RTS lines to ESP32 GPIO0 and EN via 100nF capacitors for automatic sketch upload without manual BOOT/RESET button presses
Component Size Requirements:
No components smaller than 0805/2012
Deliverables:
Schematic (.dch DipTrace file)
PCB Layout (.pcb DipTrace file)
Manufacturing-ready Gerber files
Complete Bill of Materials (BOM) with suggested part numbers
Design notes, especially for thermal management and high-current handling
Important Design Considerations:
Clean power distribution and voltage domain separation
Proper copper thickness and trace widths for 5A high-current paths
Low-EMI PCB layout techniques around switching converters and ESP32
Separate analog and digital grounds where necessary
Logical connector placement for easy wiring
Reliable automatic programming circuit
Preferred Qualifications:
Proven experience with ESP32-WROOM designs
Skilled with DipTrace schematic and PCB layout tools
Familiarity with CP2102 USB bridge circuits
Experience designing mixed-voltage (12V/5V/3.3V) systems
Good understanding of high-current and thermal design in compact PCBs
Timeline:
Project is ready to start immediately. Please submit your estimated turnaround time with your proposal.