B Duncan Ltd
Electronics Design
Mixed-signal electronics design, from concept schematic to a manufacturable, compliance-ready board.
What we do
Electronics design for industrial applications
We design mixed-signal electronics for process control, signal and power conversion, and automated systems. New designs, improvements to existing boards, and redesigns around obsolete parts.
Digital & Analogue Design
Mixed-signal circuits for control, sensing, communication, and conversion.
Power Electronics with Software Control
Electronically controlled power systems with real-time feedback.
Energy-Efficiency Design
Circuit and component choices that cut consumption in embedded and battery-powered systems.
PCB Thermal Imaging
Heat-distribution assessment on populated boards to find thermal issues early.
EMC-Aware Design
Layout and iteration for electromagnetic compatibility, backed by our own pre-compliance lab.
Obsolete Electronics Redesign
Outdated circuits modernized with current components, preserving or improving functionality.
Design for Manufacturing
Designs aligned with manufacturing reality to improve yield and production readiness.
Design Review & Optimization
Existing designs evaluated to improve performance, reduce cost, or simplify manufacturing.
Problems
Problems we work on
A part has gone end-of-life
A component that is no longer available, with knock-on effects on power, firmware, and layout. We work the migration through: candidate selection, what each option changes, and the effort it costs.
The board works but cannot be manufactured
Insufficient test coverage for the contract manufacturer, clearances that fail in assembly, or a design handed over without the files a manufacturer needs.
It fails EMC and nobody knows why
Layout-driven emissions problems found late. We design with EMC in mind and test in our own pre-compliance lab while changes are still cheap.
Boards fail in the field and the cause is unclear
Returned units investigated at component level: measurements against a known-good board, thermal imaging, and isolation of the failing stage rather than replacement of the obvious part.
Why us
Why choose us
EMC tested through development
Compliance problems surface in our own lab during development, not at the certification booking.
Hardware and firmware from one team
The board and the software that controls it are designed together, removing the handoff where problems usually hide.
Measured on real hardware
Thermal imaging, EMC measurement, and component-level fault investigation on populated boards in our own lab.
FAQ
Common questions
Do you do the firmware as well?
Yes, and on most projects it is the same team, so the board and its firmware are designed together rather than handed over.
What design tools do you use?
We work in industry-standard EDA tools, with design files held in version control alongside the firmware, and can work in your tool where a design already exists.
Can you handle manufacturing?
We take designs to the point a manufacturer can build them, including BOM, assembly documentation, and production test, and can work with your contract manufacturer through bring-up. Manufacturing itself sits with the contract manufacturer.
Will the design pass EMC?
That is not a promise any engineer can honestly make. What we do is design with EMC in mind and test early in our own lab, so problems surface while the layout can still change rather than after a certification booking.
Can you review a design we already have?
Yes. Independent schematic and layout review is a common standalone engagement, including obsolescence risk, manufacturability, and EMC-relevant decisions.
Related services
Power Electronics
Converters, inverters, and switching power stages when the design is power-dense, with topology, loss budget, and thermals measured on the bench, and the control firmware written by the same team.
Prototyping & Product Development
Take a design from concept to a working prototype and through into production, with our staged, sign-off-driven process.
EMC Pre-Compliance Testing
Catch emissions and immunity issues in our own pre-compliance lab, before a certification booking, while the layout can still change.
Discuss an electronics design
Tell us what you’re building or what the existing board isn’t doing.