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PCBA Case Studies

Real products.Practical control challenges.

These representative case studies show how HS connects control requirements, PCB design, component selection, firmware, assembly and functional testing for heating, climate and air-quality products.

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The projects below are based on current HS product platforms. Customer names and confidential implementation details are intentionally not disclosed.

Featured Work

The selection covers high-power heating control, an integrated central temperature controller and a multi-board smart air purifier.

Holographic fireplace Gen 2 video control PCBA with HDMI, USB and LVDS interfaces

Holographic Fireplace

Smart Holographic Fireplace Controller

Coordinating video processing, display output, media interfaces and product control on the Gen 2 PCBA.

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Hotel AC thermostat MCU control board rear view with main processor and interface circuits

Hotel HVAC Control

Smart Central Temperature Controller

Combining temperature sensing, HVAC communication, display control and user settings in one wall-mounted platform.

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Smart air purifier control board with Bluetooth App connectivity

Bluetooth Air Quality Control

Smart Air Purifier Control System

Coordinating particulate sensing, fan control, display feedback, touch input and Bluetooth App operation.

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Holographic fireplace Gen 2 video control PCBA with HDMI, USB and LVDS interfaces
Holographic Fireplace Gen 2 video-control PCBA with HDMI, USB and LVDS interfaces.

Case 01 · Holographic Fireplace

Holographic fireplace control built around the visual system

The Gen 2 controller must coordinate video processing, display output, media input and product-control interfaces without treating the holographic visual system as an isolated module.

Product scopeVideo processing, display output, HDMI, USB, LVDS and control interfaces.
Engineering focusSignal interfaces, power integrity, I/O planning and operating-state logic.
Manufacturing focusFine-pitch assembly, connector inspection, programming access and repeatability.
Validation focusVideo output, media input, display interfaces and control communication.

HS work across the project

  • Translate the holographic display functions into a clear signal and control architecture.
  • Review the video, USB, HDMI, LVDS, power and product-control interfaces.
  • Coordinate the video board with the fireplace controller and user commands.
  • Prepare programming, interface and functional-test access for production.
View Heating Products Discuss a Heating Project
Hotel AC thermostat MCU control board rear view with main processor and interface circuits
Third product image from the Hotel AC Thermostat PCBA set: MCU control board rear view.

Case 02 · Hotel HVAC Control

A central temperature controller that makes complex HVAC settings usable

The wall controller must read temperature conditions, exchange commands with the HVAC system and present operating modes clearly through the display and local controls.

Product scopeTemperature sensing, display, local controls, schedules and HVAC communication.
Engineering focusInterface definition, sensor accuracy, display behavior and protocol handling.
Manufacturing focusDisplay alignment, connector consistency, programming and enclosure fit.
Validation focusTemperature response, mode switching, communication and UI behavior.

HS work across the project

  • Translate HVAC modes and user settings into a consistent control-state model.
  • Coordinate temperature sensing, display, buttons and external system communication.
  • Review the integrated PCBA around enclosure, display-window and connector constraints.
  • Prepare programming and functional checks for prototype, NPI and production stages.
View Application Products Discuss a Climate Project
Smart air purifier control board with Bluetooth App connectivity
Air Purifier PCBA Bluetooth App version main control board.

Case 03 · Bluetooth Air Quality Control

A smart air purifier that turns sensor data into clear product behavior

The controller must acquire particulate or air-quality signals, regulate the fan, update the display and keep local input and Bluetooth App commands synchronized.

Product scopeAir-quality sensing, fan drive, display, touch input, indicators and Bluetooth App.
Engineering focusSensor interfaces, fan-speed control, Bluetooth communication and UI logic.
Manufacturing focusBoard-set identification, cable orientation, programming and fixture access.
Validation focusSensor response, fan stages, display values, keys and indicator behavior.

HS work across the project

  • Define how air-quality inputs affect fan speed, display status and product modes.
  • Coordinate the main driver, sensor, display, touch controls and Bluetooth App as one system.
  • Control cable interfaces, board identification and assembly documentation.
  • Prepare functional checks for sensors, fan outputs, indicators and the user interface.
View Control Board Products Discuss an Air-Quality Product

From Requirement to Production

The same controlled path, adapted to each product

The circuitry changes from project to project, but the handoff between engineering, prototype, validation and manufacturing remains explicit.

Define

Clarify product behavior, loads, sensors, interfaces, environmental conditions and failure responses.

Engineer

Develop or review the schematic, PCB layout, BOM, firmware boundary and test access.

Validate

Build prototypes, verify electrical and functional behavior, and close design or manufacturing issues.

Release

Freeze approved files, prepare fixtures and work instructions, then move through NPI to production.

Frequently Asked Questions

Questions about working from an existing or new design

Are these customer-specific case studies?
They are representative cases based on current HS product platforms and engineering work. Customer identities and confidential implementation details are not published.
Can HS start from our existing schematic, PCB or sample?
Yes. The starting point can be a complete design package, an existing control board, a prototype, or a product requirement. The review scope is defined before design or manufacturing work begins.
Can hardware, firmware and manufacturing be reviewed together?
Yes. For control products, board behavior, firmware boundaries, programming access and functional testing should be considered together so that the design can move into production without an avoidable handoff gap.
Do you support both prototype quantities and production?
HS supports engineering review, prototype builds, NPI validation and mass-production handoff. The exact process and documentation depend on the product and project scope.
What information is useful for the first review?
Send the product description, required functions, power input and loads, sensors, interfaces, mechanical limits, expected quantity, target certifications and any existing schematic, PCB, BOM, firmware or samples.

Have a similar control-board challenge?

Share the product requirements or existing design files. HS can review the control architecture, PCBA design, assembly and validation path with you.

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