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Analog audio visualizer

alimleahat·analog-audio-visualizer-pcb·hardware/audiovisualiser.kicad_pcb

Analog audio visualizer PCB layout, top view — open source board by alimleahat
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About the Analog audio visualizer PCB

Analog audio visualizer is an open source PCB design by alimleahat, published on GitHub. It is a 2-layer board measuring 130 × 100 mm, with 65 components from 29 distinct parts.

Other key parts include the LM2902, L7812, L7912 and LM2904. By type, the board carries 16 test points, 16 resistors, 14 capacitors, 7 diodes, 4 ICs and 3 transistors.

It belongs with the audio and test & measurement designs in this gallery.

From the project

Three-band analog audio visualizer built in KiCad for ELEC2101, with PCB files, assembly photos, and bench measurements.

A three-band audio visualizer built for ELEC2101 Electronic Circuits and Systems Design. It separates audio into bass, midrange, and treble, with an LED responding to each band.

Following the course guide and reference circuit, I completed the schematic in KiCad, assigned component footprints, laid out and routed the PCB, prepared the manufacturing files, assembled the board, and tested it in the lab.

Analog audio visualizer, from the project README
From the project README

Main components on the Analog audio visualizer

LM2902L7812L7912LM2904

Analog audio visualizer bill of materials (BOM)

65 components, 29 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LM2902
U1
1
L7812
U2
1
L7912
U4
1
LM2904
U5
3
2N3904
Q1, Q2, Q3
1
Signal Input
J1
2
SCREW_TERMINAL_01X03
Screw_Terminal_01x03
J2, J3
1
DB107-BP
BR1
1
50K
50k
RV1
16
TestPoint
TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8 +8
3
1N4148
D1, D3, D5
1
LEDR
D2
1
LEDG
D4
1
LEDB
D6
1
LEDY
D7
8
100NF
100nF
C1, C2, C3, C4, C7, C8, C13, C14
1
33NF
33nF
C5
1
10NF
10nF
C6
2
470UF
470uF
C9, C10
2
100UF
100uF
C11, C12
Show 9 more
QtyPartRefs
1
10K
10k
R1
2
16K
16k
R2, R3
1
36K
36k
R4
2
47K
47k
R5, R6
2
2k
R7, R8
3
4K7
4k7
R9, R11, R13
3
470R
R10, R12, R14
1
1k
R15
1
0R
R16

Analog audio visualizer design files

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

Analog audio visualizer: common questions

How big is the Analog audio visualizer PCB?

The Analog audio visualizer measures 130 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Analog audio visualizer?

65 components, from 29 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 Analog audio visualizer design files?

From the alimleahat/analog-audio-visualizer-pcb 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 Analog audio visualizer design in my own project?

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

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