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PCB DESIGN REQUIREMENTS (FINAL – MECHANICAL CONSTRAINT UPDATED) 1. BOARD OVERVIEW (UPDATED) PCB Type: Main controller PCB (production-grade) Board Width: 100 mm (FIXED – DO NOT CHANGE) Board Length: Variable – minimize as per component layout Thickness: 1.6 mm Layers: 4-layer PCB (mandatory) L1: Signals L2: Solid GND plane L3: 5V power plane L4: Signals Solder Mask: Matte black Silkscreen: White Board Edge: Black Mounting Holes: 4 × M3 (corner-aligned to final outline) ⚠️ Mechanical Priority: PCB length reduction is a design objective, provided electrical safety, thermal margin, and connector accessibility are not compromised. 2. POWER SYSTEM Power Input Voltage: 5V DC Current: Up to 10A Connector: 2-pin screw terminal (5.08 mm) Protection (mandatory): Reverse polarity protection Polyfuse / blade fuse TVS diode Power Rails 5V: Servos, PCA9685, TMC2209 motor power 3.3V: ESP32, DS3231 RTC 3.3V Regulator: ≥600 mA (buck or LDO) 3. MICROCONTROLLER Module: ESP32-WROOM-32 Wi-Fi: Primary control Reset / Boot: EN + IO0 routed to UART socket 4. SERVO CONTROL SYSTEM (LOCKED) Drivers IC: PCA9685 Qty: 4 Interface: I²C Outputs Total Servos: 40 Zones (silkscreen mandatory): Zone 1–4 (10 servos each) Servo Connector (FINAL & SAVED) Type: JST-XH Pins: 3 Lock: Friction-lock Pitch: 2.54 mm Mount: Vertical, through-hole Pinout: GND +5V PWM Power Layout Rules ≥80 mil equivalent 5V copper ≥470 µF bulk capacitor per zone Star-routed servo power 5. STEPPER MOTOR SYSTEM Driver: TMC2209 (×2) Mode: STEP / DIR UART: Required Motor: NEMA 8 (5V) Motor Connector: JST-XH 4-pin Thermal: Copper pour + vias under driver 6. REAL-TIME CLOCK IC: DS3231 Voltage: 3.3V Backup: CR2032 holder Bus: Dedicated I²C (GPIO 32, 33) 7. USER INTERFACE (LOCKED) Push Button: 1 only Function: Reset / manual mode Status LED: 1 × Addressable RGB (WS2812) 8. PROGRAMMING & DEBUG (LOCKED) Connector: UART socket / header Pins: TX, RX, GND, 3.3V (optional) USB Connector: ❌ Not used Auto-boot: EN + IO0 routed 9. LAYOUT & EMI RULES Solid uninterrupted GND plane Servo power routed away from ESP32 antenna Separate routing for: Servo PWM Stepper STEP/DIR Onboard I²C pull-ups (~4.7 kΩ) Bulk caps close to load zones 10. SILKSCREEN & MARKINGS RC1 Controller Board PCB revision ZONE 1–4 labels Power polarity UART pin labels 11. MANUFACTURING DELIVERABLES Designer must supply: Schematic (PDF) PCB layout source files Gerbers Pick & Place BOM with MPNs 3D renders
Project ID: 40175228
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Hello, This is exactly the type of PCB project I specialize in. I’m a PCB Design Engineer with experience in production-grade, multi-layer controller boards under strict mechanical and electrical constraints. I’ve reviewed your requirements and I’m confident I can deliver a clean schematic, optimized 4-layer PCB layout, and full manufacturing files with high quality. Please check my portfolio for similar completed projects. I can follow up with you step by step from schematic to the final production-ready version, with clear communication throughout. I’m ready to start — looking forward to your message. Best regards, Ahmed Yahia
₹12,500 INR in 7 days
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12 freelancers are bidding on average ₹26,625 INR for this job

As a dedicated Electrical Engineer with a Master's in Embedded Systems, I bring a wealth of experience in firmware development, PCB design, and complete IoT product engineering to your project. Specifically, my expertise spans across microcontrollers such as STM32, ESP32, Raspberry Pi to name a few. This deep understanding of the hardware coupled with my ability to create solid uninterrupted GND planes and perform separate routing for servo PWM and stepper STEP/DIR is key for delivering high-quality multi-layer PCB designs like yours. Moreover, my proficiency in using Altium Designer, KiCad, Eagle, EasyEDA and Target will ensure that your PCB layout is executed professionally. I have developed specialized skills in RF, IoT and high-speed board design which robustly fits the needs of your consumer electronics. My experience is not just limited to designing layout but I also understand the manufacturing deliverables including Pick & Place files which I will provide along with schematic (PDF), Gerbers, BOM with MPNs and 3D renders.
₹50,000 INR in 7 days
8.1
8.1

With over X years of experience in engineering and mechanical design, especially pertaining to printed circuit boards (PCB), I am confident in my ability to create an optimal multi-layer PCB design that aligns perfectly with your specifications. My proficiency in using advanced software like Altium, Eagle, and Solidworks would be invaluable in generating designs that not only meet functionality requirements but prioritize efficiency, thermal management, and electrical safety – without compromising connector accessibility. In regards to your project's power system, I am well-versed in designing power layouts and rails to ensure stable current delivery, while incorporating essential aspects such as reverse polarity protection, polyfuse/blade fuse, and TVS diode protection measures. Similarly, my expertise in creating layouts and addressing EMI challenges will ensure the segregation of servo power and stepper motor systems from the ESP32 antenna along with appropriate copper pour utilization for optimal thermal distribution.
₹12,500 INR in 2 days
7.6
7.6

Hi there, first of all, I ask you to visit my profile and see my portfolio; you will be able to see that I have many developments of real, everyday equipment, similar to what you need. I am currently available to work on your project and can send you a free preview via chat if you message me. I like that you have detailed very well how you want this PCB to be developed. I have extensive experience designing PCBs, including multilayer, double-layer, and single-layer, with excellent routing skills. I know you want a 4-layer PCB, but in case you are interested in lowering costs, I believe your design can be done in 2 layers, as I don't see it as being that dense. Regardless, 4 layers significantly improve thermal dissipation and the possibilities for compression. I hope you message me via chat to discuss further details.
₹15,000 INR in 10 days
3.8
3.8

Hello, client. You want 4-layer pcb design and I will do it in short time. I have developed several projects based on ESP32, NRF52 series, Power supply, Motor controller. I am ready to work with you. I am available to follow your time zone. Pleae contact me in more details.
₹25,000 INR in 7 days
1.7
1.7

I am an experienced PCB design engineer with deep expertise in designing production-quality PCB designs involving multi-layered embedded control boards with specific designs for handling and controlling ‘high current’ power and motor functionality with ‘EMI safety considerations.’ I can assist in the design of the RC1 controller board fully in line with the mechanical and electrical design constraints. I will provide a 4-layer PCB with L1=Signals/L2=Solid GND/L3=5V/L4=Signals with fixed 100 mm board width, minimized board length maintaining access to connectors, thermal clearances, as well as ESP32 RF performance. It will allow for a 5 V input of up to 10 A with essential protections (reverse polarity, fuse, TVS) as well as a 3.3 V > 600 mA for ESP32 WROOM 32 and DS3231 RTC. As for the servo part, it will strictly follow your locked spec: 4x PCA9685, 40-servos in Zone1 to Zone4, JST XH Vertical Connectors, star route 5V copper ≥80 mil equiv, ≥470uf bulk capacitance per zone, two TMC2209 will be done in STEP(DIR) + UART mode, appropriate copper/via for cooling: The layout will enforce all EMI rules and power integrity rules like continuous GND plane, clearance rules between antennas, clean separation rules between servo PWM, stepper control, and I²C.
₹32,000 INR in 10 days
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Rajkot, India
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₹1500-12500 INR
$30-250 USD
€30-250 EUR
€12-18 EUR / hour
€30-250 EUR
$250-750 USD
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$250-750 USD
$250-750 USD
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₹1500-12500 INR