I2S Test Signal Generator with AVR Microcontroller
32-Bit 1-kHz Digital Sine, fs 192 kHz, Level Adjustable from 0 to -110 dB
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.
Elektor recommends the Elektor PCB Service service from its business partner Eurocircuits or AISLER as the best services for its own prototypes and volume production.
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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
Resistor
R1 = 2.2 k
R2 = 100 Ω
R3 = 10 k
R4 = 150 Ω
Capacitor
C1,C2,C4 = 22 pF, C0G/NP0, lead spacing 5 mm
C3,C5,C6,C7,C8,C9 = 100 nF, X7R, lead spacing 5 mm
Semiconductor
LED1 = LED, green, 3 mm
IC1 = ATmega328P-PU, 20 MHz, DIP28
IC2 = 74HC165
IC3 = 74AC4040 – do not use HC logic !!!
IC4 = 74HC86
IC5 = 74HC74
Other
K1 = 2x3 pin header, vertical, pitch 2.54 mm
K2 = 1x4 pin header, vertical, pitch 2.54 mm
K3 = Terminal block 5.08 mm, 2-way, 630 V
S1 = Rotary Coded Switch, hexadecimal, real code, THT (e.g. Nidec Copal Electronics SD-1010)
S2 = Switch, tactile, 24 V, 50 mA, 6x6 mm
X1 = Crystal 12.288 MHz, C-load 18 pF, 10 ppm, HC-49S
PCB 200253-1 v1.1
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