I.1. Schematic Diagram

The schematic diagram of the standard Blackstomp board is shown in the Figure 1. The circuit of the standard board is optimized (and compromised) between development and production usage.

Bill of Materials

ITEM	COMPONENT	REF	QUANTITY
1	100k	R2,R4	2
2	10k	R1,R5,R6	3
3	330	R7,R13	2
4	1k	R8,R11,R12,R3,R10	5
5	220	R14	1
6	47	R15,R16	2
7	10uF/16V TANT	C15,C13	2
8	4.7uF/16V ELCAP	C14,C1,C6,C7,C2,C3	6
9	100nF MLCC	C11,C4	2
10	1N4007	D1	1
11	1N4148	D2	1
12	RED LED	LED1,LED2,LED3	3
13	H11L1V	U2	1
14	SMD Tactile Switch	KEY1,KEY2	2
15	AMS1117-3.3V	U4	1
16	ESP32-A1S	U1	1
17	Male Header 1×2	H7-H17	11
18	Male Header 2×3	J1	1
19	Male Header 1×8	H20	1
20	Male Header 1×4	X1,X2	2
21	Male Header 1×3	H1,H2,H3,H4,H5,H6,H18,H19	8