Components

Note: This board uses 0603 passive components and small outline packages, so a patient hand and good eyes (or a microscope) will be needed to hand solder. The CP2012N is in a Quad Flat no Lead (QFN) package, and is not an easy part to attach. You can skip the USB to UART chip and instead use the 0.100” programming headers (J5) to load the sketches on the ESP32 manually.

NOTE

Bill of Materials

Reference Designator	Value	Quantity	Manufacturer	Part Number
C1, C3	0.1uF 50V	2	Yageo	CC0603ZRY5V9BB104
C2, C5, C7	10uF 50V	3	Samsung Electro-Mechanics	CL31A106MBHNNNE
C4 C6	1nF 50V	2	Yageo	CC0603KRX7R9BB102
C8	1uF 50V	1	Yageo	CC0603KRX5R9BB105
C9	22uF 6.3V	1	Samsung Electro-Mechanics	CL21A226MQQNNNE
D1, D6	40V 2A	2	ON Semiconductor	SS24FL
D2	SP0502BAHT	1	Littelfuse Inc.	SP0502BAHTG
D3	GREEN 3.2V 20mA	1	Wurth Elektronik	150120GS75000
D4	BLUE 3.2V 20mA	1	Wurth Elektronik	150120BS75000
D5	20V 1A	1	ON Semiconductor	MBR120VLSFT3G
D7	600V 5A	1	SMC Diode Solutions	SD560BTR
J1	USB_B_Mini	1	Molex	1050170001
J2	Barrel_Jack	1	CUI Devices	PJ-037A
J3	AudioJack	1	Kycon, Inc.	STX-3000
J4	Solenoid Terminal	1	Pheonix Contact	1935161
Q1 Q2	S8050	2	ON Semiconductor	MMBT2222ALT1G
Q3	NMOS 60V 46A	1	ON Semiconductor	NTD5865NLT4G
R1, R2, R6, R7, R10, R13, R16	10k 1% 0.1W	7	Yageo	RC0603FR-0710KL
R14, R15	220R 1% 0.1W	2	Yageo	RC0603FR-07220RL
R3	22.1K 1% 0.1W	1	Yageo	RC0603FR-0722K1L
R4	47.5K 1% 0.1W	1	Yageo	RC0603FR-0747K5L
R5	2K 1% 0.1W	1	Yageo	RC0603FR-072KL
R8, R9, R11, R12	0R 0.1W	4	Yageo	311-0.0GRCT-ND
SW1	SPST (RED)	1	TE Connectivity ALCOSWITCH Switches	1825027-6
SW2	SPST (BLUE)	1	TE Connectivity ALCOSWITCH Switches	1825027-8
U1	CP2102N-A01-GQFN28	1	Silicon Labs	CP2102N-A02-GQFN28R
U2	AZ1117-3.3	1	Diodes Incorporated	AZ1117CH-3.3TRG1
U3	ESP32-WROOM-32	1	Espressif	ESP32-WROOM-32D
U4, U5	4N25	2	Broadcom Limited	4N25-500E