info@gmnameplate.com // 1-800-366-7668 // Pg. 1 The challenge Looking to transition from mechanical switches to “touch” technology, a leading US-based commercial appliance manufacturer approached GMN to develop a new generation capac- itive touch user interface for their refrigerator freezers. While the customer wanted to give GMN the utmost flexibility in terms of designing the capacitive circuit, they had already de - veloped a universal motherboard and were set on icon sizes. As a result, the pinout and switch sizes were already determined and the engineers at GMN had to work through these limitations to strategize the circuit layout. Additionally, during development the customer decided to revise the circuit configuration to incorporate backlit switches. This prompted GMN to int

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