HardLabs

Wm8816

hrandib·wm8816-pcb

Wm8816 PCB layout, top view — open source ESP32 board by hrandib

About the Wm8816 PCB

Wm8816 is an open source ESP32 PCB design by hrandib, published on GitHub. It is a 2-layer board measuring 100 × 100 mm, with 161 components from 47 distinct parts.

Its main chip is the ESP32C3-SUPERMINI, from the ESP32 family. Other key parts include the TPS7A3901, L78L05_SOT89, STM8S003F3P, TPS7A4901 and TXS0108EPW. By type, the board carries 67 capacitors, 35 resistors, 20 test points, 16 connectors, 14 ICs and 8 jumpers.

It belongs with the audio designs in this gallery.

From the project

8-channel volume controller based on WM8816

Main components on the Wm8816

TPS7A3901L78L05_SOT89STM8S003F3PTPS7A4901TXS0108EPWESP32C3-SUPERMINIOPA2134WM8816

Wm8816 bill of materials (BOM)

161 components, 47 distinct parts.

QtyPartRefs
1
TPS7A3901
U1
1
L78L05_SOT89
U2
1
STM8S003F3P
U3
1
TPS7A4901
U4
1
TXS0108EPW
U5
1
ESP32C3-SUPERMINI
U7
4
OPA2134
U8, U10, U12, U14
4
WM8816
U9, U11, U13, U15
1
BSS138
Q1
1
PWR_IN
J1
1
SWIM
J2
1
UART
J3
1
DISP
J4
1
AUX_DATA
J5
1
AUX_PWR
J6
1
CH_OUT1
J7
1
CH_OUT2
J8
1
CH_OUT3
J9
1
CH_OUT4
J10
1
CH1
J11
Show 27 more
QtyPartRefs
1
CH2
J12
1
CH3
J13
1
CH4
J14
1
CH_OUT_ALL
J15
1
CH_ALL
J16
8
Jumper_2_Small_Bridged
JP2, JP3, JP4, JP5, JP6, JP7, JP8, JP9
4
+9_PAD
TP1, TP6, TP11, TP16
4
+5_PAD
TP2, TP7, TP12, TP17
4
GNDA_PAD
TP3, TP8, TP13, TP18
4
GNDD_PAD
TP4, TP9, TP14, TP19
4
-9_PAD
TP5, TP10, TP15, TP20
5
10n
C1, C5, C11, C17, C21
12
10u
C2, C3, C6, C7, C8, C9, C12, C13 +4
2
100n
C4, C14
2
1u
C10, C18
2
100n
C22, C23
16
2.2u
C24, C25, C26, C27, C35, C36, C37, C38 +8
16
220n
C28, C31, C32, C33, C39, C42, C43, C44 +8
8
2.2u
C29, C34, C40, C45, C51, C56, C62, C67
4
10u
C30, C41, C52, C63
2
62k
R1, R4
5
10k
R2, R3, R6, R8, R9
1
33k
R5
1
22
R7
2
100k
R10, R11
8
22
R12, R14, R18, R20, R24, R26, R30, R32
16
100
R13, R15, R16, R17, R19, R21, R22, R23 +8

Wm8816 design files

The KiCad project lives in the hrandib/wm8816-pcb repository on GitHub; these links point at the commit this page was built from.

Wm8816: common questions

What microcontroller does the Wm8816 use?

The Wm8816 is built around the ESP32C3-SUPERMINI, from the ESP32 family.

How big is the Wm8816 PCB?

The Wm8816 measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Wm8816?

161 components, from 47 distinct parts. The full bill of materials is listed on this page.

Where can I download the Wm8816 design files?

From the hrandib/wm8816-pcb repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Wm8816 design in my own project?

The repository has no license, so all rights stay with hrandib. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Wm8816 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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