BOM (Bill of material)

Main board

Qty	Component	Value	Package
2	Capacitor	22uF/50V	PANASONIC_C (5x5.8mm)
1	Capacitor	100uF/6.3V	PANASONIC_C (5x5.8mm)
4	Capacitor	100n	0805
4	12P PCB plug-in terminal	MC1,5-12-G-3,81 or KF2EDG 12P 3.81 pitch
2	Shottky diode	SS16	DO214AC (SMA)
1	Shottky diode	1N4148WS	SOD323
1	Dual shottky diode	BAT54A	SOT23
1	Step-Down Regulator	MCP16301T-I/CH	SOT23-6
5	Quad Channel Optocoupler	TLP290-4	SO16
1	Dual bidirectional bus buffer	P82B96TD	SO08
2	IO expander	MCP23017-E/SO	SO28W
1	Power Coil	SRN5040-220M	L5040
9	Smart Low Side Power Switch	BTS3410G	SO8
3	Resistor	680R	0805
20	Resistor	1K	0805
2	Resistor	2K2	0805
20	Resistor	3K9	0805
2	Resistor	4K7	0805
5	Resistor	10K 1%	0805
1	Resistor	52K3	0805
1	ESP32 breakout board	ESP32_DEVKITV1-38PIN
1	Ethernet breakout board	LAN8720_ETH_BOARD
1	Right angle 14P connector	WURTH 613014243121
1	19P header socket		19x2.54mm
1	17P header socket		17x2.54mm
1	DIN plastic case	ZD1006J ABS V0
1	Top lid for DIN case	ZDFJ1006 ABS V0
4	Screw lid for DIN case	ZD3TC ABS V0

Optional status LED

Component	Value	Package
LED	Red / Green / Yellow	3mm
LED bezel clip holder		3mm
2P pin header socket		2P 2.54mm pitch
2P pin header pin		2P 2.54mm pitch
Wire	Red and black	0.25mm² (24 AWG)

No resistor required, it's fitted on the board (R53)

Extension board

In case you run out of I/O you can use the same PCB and extend the main via buffered I2C

Qty	Component	Value	Package
1	Capacitor	22uF/6.3V (50V)	PANASONIC_C (5x5.8mm)
2	Capacitor	100n	0805
4	12P PCB plug-in terminal	MC1,5-12-G-3,81 or KF2EDG 12P 3.81 pitch
1	Dual shottky diode	BAT54A	SOT23
4	Quad Channel Optocoupler	TLP290-4	SO16
1	Dual bidirectional bus buffer	P82B96TD	SO08
2	IO expander	MCP23017-E/SO	SO28W
8	Smart Low Side Power Switch	BTS3410G	SO8
16	Resistor	1K	0805
16	Resistor	3K9	0805
2	Resistor	4K7	0805
1	3.3V LDO	AMS1117 or LM1117-3.3	SOT-223
1	DIN plastic case	ZD1006J ABS V0
1	Top lid for DIN case	ZDFJ1006 ABS V0
4	Screw lid for DIN case	ZD3TC ABS V0