HardLabs

In13-Spectrum-Analyser

ImNoahDev·In13-Spectrum-Analyser·PCB/In13 Visualiser.kicad_pcb

In13-Spectrum-Analyser PCB layout, top view — open source ESP32 board by ImNoahDev

About the In13-Spectrum-Analyser PCB

In13-Spectrum-Analyser is an open source ESP32 PCB design by ImNoahDev, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 264.2 × 71.1 mm, with 109 components from 42 distinct parts.

Its main chip is the ESP32-WROOM-32, from the ESP32 family. Other key parts include the AMS1117-3.3, MSGEQ7, MCP6002-XMC, CH340C and MAX1771XSA. By type, the board carries 47 resistors, 29 capacitors, 9 ICs, 8 transistors, 3 switches and 2 connectors.

It belongs with the iot & wireless, test & measurement and displays & leds designs in this gallery.

From the project

I have designed an audio spectrum analyser that breaks an audio signal down into 7 frequency bands and displays each band on an in13 nixie tube. My project has Wifi allowing for smart home control. My project has a volume (changes sensitivity) and a brightness potentiometer. Each

I have designed an audio spectrum analyser that breaks an audio signal down into 7 frequency bands and displays each band on an in13 nixie tube. My project has Wifi allowing for smart home control. My project has a volume (changes sensitivity) and a brightness potentiometer. Each PCB takes a single audio signal input and 2 can be used for full stereo.

The case uses a laser cut kerf bend to allow the wrap around sheet to be cut in a single part.

In13-Spectrum-Analyser, from the project README
From the project README

Main components on the In13-Spectrum-Analyser

AMS1117-3.3MSGEQ7ESP32-WROOM-32MCP6002-XMCCH340CMAX1771XSA

In13-Spectrum-Analyser bill of materials (BOM)

109 components, 42 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
AMS1117-3.3
U1
1
MSGEQ7
U2
1
ESP32-WROOM-32
U3
4
MCP6002-XMC
MCP6002-xMC
U4, U5, U6, U18
1
CH340C
U7
1
MAX1771XSA
MAX1771xSA
U11
7
MJE340_
Q1, Q2, Q3, Q4, Q5, Q6, Q7
1
IRFP250N
Infineon Technologies
Q8
1
USB_C_RECEPTACLE_USB2.0_14P
USB_C_Receptacle_USB2.0_14P
J1
1
Conn_Coaxial
J3
7
~
N1, N2, N3, N4, N5, N6, N7
2
10K
10k
RV2, RV3
2
SW_Push
SW1, SW3
1
SW_Push
SW2
1
UF4004
D2
1
56 uH
L1
1
4.7uF 10v
C1
3
0.1uF 10v
C2, C9, C10
1
10V 3.3uF
C3
2
10V 0.1uF
C4, C6
Show 22 more
QtyPartRefs
1
10v 22uF
C5
1
10V 1uF
C7
1
33PF
33pF
C8
2
10UF
10uF
C11, C22
9
0.1UF
0.1uF
C12, C13, C14, C15, C16, C17, C18, C19 +1
1
100uF 16v
C21
1
47uF 200V
C23
1
0.1uF 250v
C24
5
0.1UF
0.1uF
C25, C26, C27, C28, C29
2
5.1K
R1, R2
1
200K
R3
4
10K
10k
R4, R7, R46, R47
1
18K
R5
1
33K
33k
R6
7
4.7K
4.7k
R8, R13, R18, R23, R28, R33, R38
7
470k 1/4w
R9, R15, R20, R25, R30, R35, R40
7
15k 1W
R10, R14, R19, R24, R29, R34, R39
7
2.2k 1/4W
R11, R16, R21, R26, R31, R36, R41
7
820 1/4w
R12, R17, R22, R27, R32, R37, R42
1
0.05 1w
R43
1
820k 0.25w 200v
R44
1
10k 0.25w 200v
R45

In13-Spectrum-Analyser design files

The KiCad project lives in the ImNoahDev/In13-Spectrum-Analyser repository on GitHub; these links point at the commit this page was built from.

In13-Spectrum-Analyser: common questions

What microcontroller does the In13-Spectrum-Analyser use?

The In13-Spectrum-Analyser is built around the ESP32-WROOM-32, from the ESP32 family.

How big is the In13-Spectrum-Analyser PCB?

The In13-Spectrum-Analyser measures 264.2 × 71.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the In13-Spectrum-Analyser?

109 components, from 42 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the In13-Spectrum-Analyser design files?

From the ImNoahDev/In13-Spectrum-Analyser repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the In13-Spectrum-Analyser design in my own project?

It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.

Can I test firmware for the In13-Spectrum-Analyser 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.

Similar boards