S
Stitex
Engineering

Custom Electronics Development: From Schematic to Series

Short answer: custom electronics development is the path from schematic to finished product — board design, firmware, prototype, testing and production. Here are the stages, the realistic timelines, and what to look at when choosing a contractor so the project does not stall halfway.

July 21, 20267 min readStitex Technologies

The stages of the work

StageWhat happens
Requirementswhat the device must do, in what conditions, at what cost per unit
Circuit designcomponent selection, schematic, power and interface decisions
PCB layoutboard routing with thermal, EMC and manufacturability constraints
Firmwarethe control logic, communication protocols, update mechanism
Prototypefirst assembly, bring-up, measurement against the requirements
Testing and revisionthe stage that usually consumes the most time
Seriesproduction documentation, assembly, incoming inspection
Where projects usually stall
Not at manufacturing the board — at debugging. A prototype that works on the bench and a product that works reliably in the field are different things, and the gap between them is where the schedule goes. Budget for iteration rather than assuming the first prototype is the product.

What to look at in a contractor

  • Whether they have taken a product to series themselves, not only to prototype,
  • Whether hardware and firmware are done by the same team — the handover is where defects hide,
  • What happens after delivery: revisions, spare parts, firmware updates in the field,
  • Whether the documentation you receive lets somebody else manufacture it.

Hardware and software designed together is the single biggest factor in how well the finished device behaves. Where the device has to report telemetry back, that connects directly to IoT equipment monitoring, and in building services to remote HVAC management.

Frequently asked questions

How long does developing a device take?

It depends on complexity: a simple product takes weeks, something complex with certification takes months. Most of the time goes into circuit design, prototyping and debugging rather than manufacturing the board. We quote timelines once the requirements are defined.

Can we order only the board, or only the firmware?

Yes, we work on individual stages — board design, firmware, or improving an existing product. But the best result comes when the hardware and software are designed together.

Do you do production runs or only prototypes?

Both: from a prototype through to small and medium series. We have our own products in production, so the path from schematic to series is well worn.

We will develop your device

From the idea and the schematic through firmware, prototype and series. Describe the task and we will scope it. The first consultation is free.