Expected duration: 6-10 weeks Description: I am developing a small standalone audio-processing puck that attaches to the back of a mobile phone. An early breadboard version has already been built (with schematic, BOM, and partial firmware). I now need a skilled freelancer to refine this into a compact puck design with working firmware and deliver a testable prototype.
Your role will be to:
Review existing breadboard design files (schematic, BOM, early firmware)
Redesign into a puck-form PCB suitable for attaching to a phone
Write and implement firmware to process audio and trigger outputs based on provided phrase lists (details shared after NDA)
Integrate microphones, BLE, vibration motor, LED, and MCU/AI chip
Assemble the puck and test functionality
Provide a short video demonstration of it working
Ship the assembled prototype to me in the UK
Requirements:
Strong experience in embedded hardware + firmware development
Familiarity with audio devices, MEMS microphones, BLE, low-power design
PCB design skills (KiCad/Altium) with experience miniaturizing breadboard prototypes
Ability to write custom firmware for audio phrase/event detection
Clear communication and full documentation of work
Deliverables:
Refined schematic + PCB layout
Verified BOM with supplier links
Working firmware (.bin and/or source) implementing phrase/event detection logic
Assembled and tested puck prototype
Video demo of prototype working
Prototype shipped to UK
Documentation of design and firmware
Milestones:
Audit & Plan – Review existing design, provide updated schematic/BOM plan
Modern Japandi Villa Design Plans Category: 3D Rendering, AutoCAD, Building Architecture, Home Design, Interior Design, Landscape Design, Revit, SketchUp Budget: $1500 - $3000 USD
Reliability Maintenance for Chemical Plant Category: Asset Management, Chemical Engineering, Industrial Engineering, Process Engineering, Risk Management, Safety Consulting, Six Sigma, Training Budget: $10000 - $20000 USD
29-Mar-2026 10:00 GMT
Hiring technology teaching trainers in telugu or english Category: Blockchain, Digital Signal Processing, Edge Computing, Embedded Systems, Low Code, Machine Learning (ML), MATLAB, Medical Billing And Coding, Quantum Computing, Very Large Scale Integration (VLSI) Budget: ₹12500 - ₹37500 INR
29-Mar-2026 09:59 GMT
Cartoon Sangeet Dance Animation Video Category: 2D Animation, Adobe Animate, After Effects, Animation, Caricature & Cartoons, Video Editing, Video Production, Video Services Budget: ₹600 - ₹1500 INR
29-Mar-2026 09:56 GMT
India Local market research job Category: Data Collection, Internet Research, Market Analysis, Market Research, Qualitative Research, Research Budget: ₹1500 - ₹12500 INR
29-Mar-2026 09:55 GMT
3D Corporate Logo Animation Category: 3D Animation, 3D Graphic Design, 3D Logo, 3D Modelling, 3D Visualization, After Effects, Animation, Blender, Logo Animation Budget: £10 - £15 GBP
29-Mar-2026 09:52 GMT
Highly Skilled UI/UX Figma Designer Category: Figma, Graphic Design, HTML, UI / User Interface, User Interface / IA, UX / User Experience, Web Design Budget: $30 - $250 USD
