Simple 7-Band Audio Spectrometers
Gerber file
CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor Green and Gold members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.
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Components
The BOM (Bill of Materials) is the technically exhaustive listing of parts and other hardware items used to produce the working and tested prototype of any Elektor Labs project. The BOM file contains deeper information than the Component List published for the same project in Elektor Magazine. If required the BOM gets updated directly by our lab engineers. As a reader, you can download the list here.
Want to learn more about our BOM list? Read the BOM list article for extra information.
Component list
Component List
PCB 180166-1
Resistors
R1,R2 = 22kΩ, 1%, 125mW, 150V
R3 = 220kΩ, 1%, 125mW, 150V
R4 = 10kΩ, 1%, 125mW, 150V
Capacitors
C1 = 1nF, 50V, 10%
C2 = 33pF, 50V, C0G, 10%
C3-C6,C9,C10 = 0.1µF, 100V, ± 10%
C7 = 22µF, 20V, TAJ Series, ± 10%
C8 = 22µF, 10V, TAJ Series, ± 10%
Inductor
L1 = 10 µH
Semiconductors
IC1 = ATmega328P-AU, programmed, Elektor Store # 180166-41
IC2 = MSGEQ7
IC3 = KF50BD-TR
Miscellaneous
K1 = 2-pin pinheader, 0.1’’ pitch
K2 = 3- pin pinheader, 0.1’’ pitch
DIP Socket, 0.1’’ pitch, 2227MC Series, 0.3’’ length
LCD1 = M605 0.95-inch, 7-pin, full colour 65K, ssd1331 OLED
7-way pinheader receptacle, 0.1’’ pitch
PCB 180166-1, Elektor Store
Component List
PCB 180166-1
Resistors
R1 R2 = 22kΩ, 1%, 125mW, 150V
R3 = 220kΩ 1%, 125mW, 150V
R4 = 10kΩ, 1%, 125mW, 150V
Capacitors
C1 = 1nF, 50V, 10%
C2 = 33pF 50V, C0G, 10%
C3-C7 = 0.1µF, 100V, 10%
C8 = 10µF, 10V, TAJ Series, 10%
Inductor
L1 = 10µH
Semiconductor
IC1 = ATmega328P-AU, programmed, Elektor Store # 180166-42
IC2 = MSGEQ7
Miscellaneous
K1 = Micro USB Type B receptacle, vertical mounting
K2 = Jack socket, 3 contacts, 3.5mm, PCB mount
DIP Socket, 0.1’’ pitch, 2227MC Series, 0.3’’ length
LCD1 = M605 0.95-inch 7-pin full colour 65K, ssd1331 OLED
7-way pinheader receptacle, 0.1’’ pitch
S1 = tactile switch, non-Illuminated, 24V, 50mA
PCB 180166-2, Elektor Store
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