Micro pump driver board and door-lock motor
Client project: project fee $9,000. Two related subsystems for one compact product. For a miniature water pump we designed the driver board: motor driver chip selection, the circuit, and conversion from full-duplex to half-duplex serial so the board fits the product's bus. For a door-lock gear motor we did the structural design, power-consumption and functional tests, and supported a small production batch, testing samples before delivery.
- Client type: Client (not named)
- Units: Small batch (count not published)
- Project fee: $9,000
- Stage: Client project, small batch delivered
Overview and tech stack
- Project type
- Small devices, DIY, consumer and education electronics
- Pump driver
- DC motor driver chip and supporting circuit
- Interface
- Full-duplex to half-duplex serial conversion
- Motor
- Motor selection and validation, power-consumption evaluation
- Mechanism
- Door-lock gear motor housing and structural design
- Production
- Small batch, with sample-level testing before delivery
What we built
- Micro pump driver board circuit design
- Full-duplex to half-duplex serial communication design
- DC motor driver chip selection and circuit development
- Motor selection, validation and power-consumption testing
- Door-lock motor structural design and assembly review
- Small-batch production support, functional and reliability checks
Project figures
- Project fee
- USD 9,000
- Included
- circuit design; structural work; testing and evaluation; small-batch production support
Figures from the client project itself; the client is not named. A quote for your build follows a review of your files.
Deliverables
- Circuit design files and engineering documentation
- Verified motor-selection recommendation
- Structural design files for the door-lock motor assembly
- Tested samples and small-batch production records
Start a similar project
- Send what you have: sketches, a reference product, files or a written idea.
- We review it and list the gaps and open questions.
- You get a written scope and quote.
Photos and design files

