• 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 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)
• Human Comfort Indicator PCB pattern (PDF download) [21105261] (Free)

Kit parts list

	1 × Serial 2.9-inch 296×128-pixel e-paper module
	3 × 4-pin tactile switch, black 6×6x7mm (3mm actuator)
	1 × 47µH 1.1A 6×6mm inductor (NR6045T470M)
	1 × Human Comfort Indicator PCB [21105261]
	1 × GY-BME280 module (6-pin/3.3V version)
	1 × single AA cell holder

Connectors

	1 × USB Type-C socket (power only, SMD mounting pads)
	1 × 24-pin FFC, 0.5mm pitch connector
	1 × 9-pin male header (2.54mm pitch)
	1 × 6-pin male right-angle header (2.54mm pitch)

Semiconductors

	1 × PIC24FJ256GA702-I/SS programmed for the Human Comfort Indicator [2110526A.HEX]
	2 × 3mm red/green bicolour diffused LED (two-lead)
	1 × MCP73831T-2ACI/OT Li-ion charger IC (SOT-23-5)
	1 × MCP1700T-3302E/TT 3.3V 250mA LDO regulator (SOT-23)
	2 × AO3400 30V 5.8A N-channel Mosfet (SOT-23)
	1 × BAT54C 25V 200mA schottky dual common-cathode diode (SOT-23)
	3 × MBR0540 50V 500mA schottky diode (SOD-123)

SMD Capacitors

	4 × 10µF 25V M2012/0805 X5R 10%
	12 × 1µF 50V M2012/0805 X7R
	3 × 100nF 50V M2012/0805 X7R

SMD Resistors

	1 × 100kΩ ±1% M2012/0805 ⅛W
	4 × 10kΩ ±1% M2012/0805 ⅛W
	2 × 5.1kΩ ±1% M2012/0805 ⅛W
	3 × 1kΩ ±1% M2012/0805 ⅛W
	1 × 0.47Ω ±1% M2012/0805 ⅛W

Cable & Hardware

	4 × Small adhesive rubber foot
	1 × Double-sided foam-core tape pad, 39 × 61 × 1.5mm or 43 × 54 × 1.5mm