Project Description
Project Overview
The goal is to design and deliver a single-board motherboard (Gerber-ready) powered from a 22V battery source, integrating:
* Multi-rail power management
* Digital control system
* High-voltage generation architecture (conceptual + control side)
* Touchscreen UI interface
* Precision timing and current control
The system will be controlled via a microcontroller (ESP32 or equivalent) and connected to a Windows 11-based mini computer for UI processing.
Core System Requirements (High-Level)
1. Power Management Subsystem
* Input: 22V battery (approx. 2500 mAh)
* Regulated outputs:
* 3.3V (MCU & logic)
* 5V (peripherals)
* 12V (drivers)
* 15V (analog/control stages)
* Efficient DC-DC topology (buck/isolated as required)
* Protection: OVP, OCP, thermal considerations
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2. Digital Control System
* MCU: ESP32 (or equivalent high-performance MCU)
* PWM-based control interface for high-voltage driver stage
* Adjustable parameters via UI:
* Voltage control (scaled control domain)
* Current control (low-current precision range)
* Timing control (millisecond-level precision)
* GPIO-controlled step switching / modulation
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3. High-Voltage Driver Interface (Control Side Only)
* PWM-controlled drive stage (0–12V control signal domain)
* Interface to external HV generation stages (flyback + multiplier)
* Signal isolation and noise protection critical
* Feedback-ready design (voltage/current sensing interface)
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4. Pre-Heat Control Subsystem (Phase 2)
* Controlled warm-up sequence:
* Duration: ~60 seconds
* 5-step gradual ramp profile
* Output target:
* ~3V regulated output
* Up to ~2.7A current capability
* Stable current regulation (closed-loop preferred)
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5. UI & System Integration
* External mini PC (Windows 11) for touchscreen interface
* Communication with MCU (UART / USB / SPI preferred)
* Real-time parameter adjustment:
* Voltage scaling
* Current limiting
* Exposure timing
* Clean API/protocol between UI and control board
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Required Expertise
We are looking for candidates with proven experience in:
* High-voltage system design (industrial / imaging / similar domains)
* Advanced PCB design (multi-layer, noise-sensitive layouts)
* Power electronics (DC-DC, PWM control, current regulation)
* Embedded systems (ESP32 / STM32 preferred)
* Mixed-signal design (analog + digital integration)
* EMI/EMC-aware layout practices
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Tools & Deliverables
Preferred Tools:
* KiCad / Altium Designer / Proteus
Deliverables:
* Complete schematic design
* PCB layout (production-ready)
* Gerber files (ready for fabrication)
* BOM (with recommended components)
* Basic firmware structure (ESP32 control logic)
* Documentation (block diagram, design notes)
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Nice to Have
* Experience in imaging systems or similar high-voltage applications
* Knowledge of safety compliance and isolation design
* Experience integrating MCU with Windows-based UI systems
* Ability to simulate (Proteus / SPICE)
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Engagement Details
* Remote freelance project
* Milestone-based delivery
* Long-term collaboration opportunity for Phase 2 & system expansion
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How to Apply
Please include:
* Portfolio of similar projects (especially high-voltage / power systems)
* Tools you use (KiCad / Altium / others)
* Estimated timeline
* Your approach to system architecture
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If you are a serious engineer with real-world experience in advanced power electronics, we want to work with you.