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The universal IR blaster needed a compact, low-cost enclosure with reliable screw-based assembly, accessible reset button integration, and support for smart appliance control through mobile phones or microcontrollers.
This case study covers iMAC Design and Engineering Services’ product design and development work on a universal IR blaster. The device transmits infrared signals to control a wide range of home appliances including televisions, air conditioners, and other IR-controlled devices, using microcontrollers or mobile phones.
| Product | Universal IR Blaster |
|---|---|
| Industry | Consumer Electronics / Smart Home |
| Services | Hardware Product Development |
| Stage | New product development |
| Design Scope | Enclosure design, assembly method, button integration, injection molding |
The brief required a compact, cost-effective IR blaster capable of transmitting IR signals to control a wide range of home appliances that use IR remote controls, including televisions and air conditioners. The device needed to work with microcontrollers or mobile phones, providing a versatile and user-friendly solution for home automation.
Joining the top and bottom parts of the IR blaster enclosure proved difficult. Snap-fit joints were considered initially but proved unreliable due to tight tolerances, making assembly inconsistent. This is one of the common mistakes that can affect assembly reliability when enclosure details are not resolved early. Ultrasonic welding was explored as an alternative but was ruled out as too expensive for the project budget. A cost-effective and structurally reliable joining method was needed.
Integrating the reset button into the mold design created its own set of problems. The button’s position made it hard to access and complicated the injection molding process, increasing the risk of defects or misalignment during production. The button needed to be both functional and easily accessible without compromising the mold design.
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Small screws were used to join the top and bottom parts of the enclosure. This approach proved budget-friendly, straightforward to assemble, and preserved the clean outer appearance of the product. Screws allowed precise alignment and secure fastening without requiring specialized equipment or processes.
The mold design was modified to reposition the reset button in a more accessible location. The wall thickness around the button was adjusted to support a smoother molding process and make the button easier to use without risking damage to the casing.
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The project delivered a fully operational prototype capable of controlling multiple home appliances via IR signals, compatible with a wide range of IR-controlled appliances. Budget-friendly materials and manufacturing processes kept production costs low without compromising quality. The screw-based enclosure assembly and repositioned reset button resolved both challenges identified during development.
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