This project is sponsored by PCBWay, a leading PCB manufacturing service provider.
PCBWay is supporting the fabrication of prototype hardware for this system, enabling real-world validation and testing beyond simulation. Their sponsorship demonstrates commitment to supporting engineering education and open-source development.
Fabrication Status: Finished
Manufacturing Partner: PCBWay - Professional PCB Services
PCBs manufactured by PCBWay - Professional quality for precision analog circuits
This repository documents an engineering project focused on the design and simulation of a Real-Time Adaptive Signal Conditioning System for Wide Dynamic Range Inputs.
The system automatically regulates signal amplitude through level-dependent adaptive gain control, ensuring stable output behavior despite significant variations in input magnitude. While the principles draw from audio dynamic range compression, the project is framed as a generic signal conditioning and control system applicable to various engineering domains.
| Parameter | Specification |
|---|---|
| Supply Voltage | ±12V DC |
| Power Consumption | ~320mW (typical) |
| Maximum Input | 12Vpp (6V peak) |
| Frequency Response | 20Hz – 20kHz |
| Attack Time Range | 1ms – 100ms (adjustable) |
| Release Time Range | 50ms – 1.05s (adjustable) |
| Compression Ratio | 1:1 to ∞:1 (variable) |
| PCB Layers | 2-layer FR4 |
| Total Component Cost | ~$25 USD / 75 TND |
- Feed-forward compression architecture - Fast response time
- Diode ladder voltage-controlled amplifier - Cost-effective, low distortion
- Precision envelope detection - Accurate signal level monitoring
- Adjustable threshold, attack, release, and ratio controls
- Input protection circuitry - Zener clamp at 6.2V
- Variable makeup gain amplifier - Output level control
- 5-stage LED level indicator - Visual feedback
- Modular implementation - Use only what you need
- Design a real-time adaptive gain control system
- Handle wide input dynamic ranges without saturation
- Apply control-system principles to signal conditioning
- Validate system behavior through simulation
- Develop manufacturable PCB implementation
- Present the design in a clear, engineering focused manner
- Adaptive gain control
- Dynamic range regulation
- Real-time signal processing
- Feed forward control architecture
- Time domain system response (attack and release behavior)
These concepts are demonstrated using standard analog test signals, such as sine waves and amplitude step inputs.
System validation is conducted via circuit level simulation:
- Time-domain waveform analysis
- Input versus output amplitude characterization
- Gain response under varying signal levels
Simulation is employed to isolate system behavior and verify functional correctness under controlled conditions.
Complete technical documentation available in /Report.pdf
The comprehensive report includes:
- Theoretical background and system architecture
- Detailed circuit analysis for each functional block
- Simulation results and validation methodology
- PCB design considerations and layout strategy
- Bill of materials and cost analysis
- Power consumption analysis and thermal considerations
- Design iterations and problem-solving process
Following simulation validation, the system has been designed for physical implementation:
- PCB Design Tool: KiCAD
- PCB Specifications: 2-layer FR4, standard manufacturing
- Design Approach: Modular layout, ground plane strategy, optimized trace routing
- Manufacturing Partner: PCBWay
The PCB design translates the validated circuit architecture into a manufacturable format suitable for prototype fabrication and testing.
Current Status: Gerber files generated, PCBs in production with PCBWay.
- Simulation Environment: Proteus
- PCB Design: KiCAD
- Signal Type: Analog test signals (audio-frequency range used for convenience)
- Methodology: Design → Simulate → Analyze → Validate → Implement
Completed:
- Core system design
- Functional simulation and validation
- PCB layout and design
- Manufacturing file preparation
- PCB fabrication
- Prototype assembly
In Progress:
- Physical testing and validation (scheduled)
Updates will be posted as i move on to the next steps.
Manufacturing Partner:
PCBWay - PCB fabrication sponsorship enabling physical prototype development and testing.
Academic Context:
This project was developed as part of engineering studies at ISE'TCOM, with internship framework provided by ISET Sousse.
├── PCB-images/ # Technical documentation
├── Schematics in KiCad/ # KiCAD PCB design files
├── Schematics(for simulation)/ # Manufacturing files
├── topologys/ # Proteus simulation files
├── additional footprints & 3D models used/ # Foot prints and 3D models
├── images/ # Schematics and renders
├── Report.pdf/
Project Author: Saif Abdessayed
- Email: saif.abdessayed321@gmail.com
- GitHub: @GarablueX
- LinkedIn:Saif Abd'Essayed
Interested in collaborating? Open an issue or pull request!
Questions about the design? Check the documentation or open a discussion.
Last Updated: April 2026
Version: 1.2 - PCB fabrication Done
This project is shared for educational and portfolio purposes only.