matrix

Charlieplexed LED matrix controlled by an ESP32-C6-MINI-1U.

This is intended to both be a standalone board (with two buttons as inputs) and a test of these specific components for use in more ambitious future projects. Additionally, charlieplexing was a new concept for me, which is why I wanted to first try it out in this format. The ESP32 was selected for its compatibility with Arduino firmware, especially having had previous experience working with the microcontroller. Six GPIO pins are allocated for the matrix, and through charlieplexing, the board controls 30 LEDs (6×5). The included firmware provides an API for controlling the matrix through a multiplexing routine.

Schematic

PCB

BOM

Qty	Value	LCSC	Link	Price
2	2.2 µF	C23630	https://jlcpcb.com/partdetail/24366-CL10A225KO8NNNC/C23630	$0.0055
1	1 µF	C15849	https://jlcpcb.com/partdetail/16531-CL10A105KB8NNNC/C15849	$0.0048
1	22 µF	C59461	https://jlcpcb.com/partdetail/60514-CL10A226MQ8NRNC/C59461	$0.0083
1	0.1 µF	C14663	https://jlcpcb.com/partdetail/YAGEO-CC0603KRX7R9BB104/C14663	$0.0024
32	LED_Small	C2286	https://jlcpcb.com/partdetail/Hubei_KENTOElec-KT0603R/C2286	$0.0058
1	Conn_01x02	C160352	https://jlcpcb.com/partdetail/JST-B2B_PH_SM4_TB_LF_SN/C160352	$0.394
1	USB_C_Receptacle_USB2.0_14P	C165948	https://jlcpcb.com/partdetail/Korean_HropartsElec-TYPE_C_31_M12/C165948	$0.1731
2	5.1k Ω	C23186	https://jlcpcb.com/partdetail/23913-0603WAF5101T5E/C23186	$0.0011
2	10k Ω	C25804	https://jlcpcb.com/partdetail/26547-0603WAF1002T5E/C25804	$0.0011
8	470 Ω	C23179	https://jlcpcb.com/partdetail/23906-0603WAF4700T5E/C23179	$0.0012
2	22 Ω	C23345	https://jlcpcb.com/partdetail/24078-0603WAF220JT5E/C23345	$0.0011
4	SW_Push	C720477	https://jlcpcb.com/partdetail/XUNPU-TS_1088AR02016/C720477	$0.0434
1	ESP32-C6-MINI-1U	C20627095	https://jlcpcb.com/partdetail/22039339-ESP32_C6_MINI_1UH4/C20627095	$4.8423
1	XC6206PxxxMR	C5446	https://jlcpcb.com/partdetail/TorexSemicon-XC6206P332MRG/C5446	$0.0905