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Sonometer-A1

gloutchov·Sonometer-A1·KiCad/Sonometer_A1.kicad_pcb

Sonometer-A1 PCB layout, top view — open source board by gloutchov
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About the Sonometer-A1 PCB

Sonometer-A1 is an open source PCB design by gloutchov, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 100 × 80 mm, with 87 components from 55 distinct parts.

Other key parts include the OPA4197IDR, AD8436ARQZ, LM339BIDR, LM393BIDR and LM4040A-3.0. By type, the board carries 44 resistors, 21 capacitors, 11 diodes, 7 ICs, 1 connector and 1 microphone.

It belongs with the power & battery designs in this gallery.

From the project

Analog battery-powered sound level indicator, 60–95 dB(A) · Rilevatore sonoro analogico a batteria

Sonometer A1 è un rilevatore sonoro analogico alimentato da una pila da 9 V. Una barra cumulativa di otto LED visualizza livelli di progetto da 60 a 95 dB(A), a passi di 5 dB:

- verde: 60, 65 e 70 dB(A); - giallo: 75 e 80 dB(A); - rosso: 85, 90 e 95 dB(A).

Il percorso del segnale comprende microfono, preamplificatore, filtro di ponderazione A, convertitore RMS reale, comparatori e barra LED. Il dispositivo non usa microprocessori, firmware o componenti programmabili.

Sonometer-A1, from the project README
From the project README

Main components on the Sonometer-A1

OPA4197IDRAD8436ARQZLM339BIDRLM393BIDRLM4040A-3.0

Sonometer-A1 bill of materials (BOM)

87 components, 55 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
OPA4197IDR
U1, U2
1
AD8436ARQZ
U3
2
LM339BIDR
U4, U5
1
LM393BIDR
U6
1
LM4040A-3.0
U7
1
BAT 9V
J1
1
CMC-9745-44P
MK1
1
20k CAL
RV1
1
ON / OFF
SW1
1
60 dBA VERDE
D1
1
65 dBA VERDE
D2
1
70 dBA VERDE
D3
1
75 dBA GIALLO
D4
1
80 dBA GIALLO
D5
1
85 dBA ROSSO
D6
1
90 dBA ROSSO
D7
1
95 dBA ROSSO
D8
1
BAT LOW
D9
1
POWER
D10
1
SS14
D11
Show 35 more
QtyPartRefs
2
47u
C1, C3
2
1u
C2, C15
3
100n
C4, C5, C6
1
10n
C7
2
1n
C8, C9
1
470n
C10
1
10u
C11
1
10u
C12
7
100n
C13, C16, C17, C18, C19, C20, C21
1
1u
C14
1
1.50k
R1
1
100
R2
1
2.20k
R3
2
75.0k
R4, R34
1
1.00k
R5
1
20.0k
R6
1
76.8k
R7
1
14.7k
R8
1
21.5k
R9
2
2.00k
R10, R11
2
13.0k
R12, R13
9
10.0k
R14, R40, R41, R42, R43, R44, R45, R46 +1
1
30.0k
R15
1
10M
R16
9
3.30k
R20, R21, R22, R23, R24, R25, R26, R27 +1
1
825k
R30
1
464k
R31
1
255k
R32
1
140k
R33
1
37.4k
R35
1
16.5k
R36
1
4.99k
R37
1
110k
R50
1
82.5k
R51
1
6.80k
R53

Sonometer-A1 design files

The KiCad project lives in the gloutchov/Sonometer-A1 repository on GitHub; these links point at the commit this page was built from.

Sonometer-A1: common questions

How big is the Sonometer-A1 PCB?

The Sonometer-A1 measures 100 × 80 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Sonometer-A1?

87 components, from 55 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 Sonometer-A1 design files?

From the gloutchov/Sonometer-A1 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 Sonometer-A1 design in my own project?

Yes, under the terms of its Apache-2.0 license, which gloutchov chose for the repository.

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