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Human Comfort Indicator PCB pattern (PDF download) [21105261] A PDF with the PCB pattern for the HCI. It's a double-sided design and both layers are in a single PDF. Cat No SC3631. Price: Free Files: HCI PCB (21105261).pdf (40.9KB) Related to: Project: Human Comfort Indicator (June 2026 [print issue]) Other items relevant to this project: Human Comfort Indicator PCB [21105261] ($5.00) PIC24FJ256GA702-I/SS programmed for the Human Comfort Indicator [2110526A.HEX] ($15.00) GY-BME280 module (6-pin/3.3V version) ($10.00) Human Comfort Indicator short-form kit ($60.00) Human Comfort Indicator 3D-printed case (white, portrait version) ($12.50) Human Comfort Indicator 3D-printed case (white, landscape version) ($12.50) Human Comfort Indicator firmware & STL files (Free)