HardLabs

Squeeki kleen Audio FC-rounded

Gumball2415·squeeki-kleen-Audio-FC

Squeeki kleen Audio FC-rounded PCB layout, top view — open source board by Gumball2415

About the Squeeki kleen Audio FC-rounded PCB

Squeeki kleen Audio FC-rounded is an open source PCB design by Gumball2415, published on GitHub under the TAPR-OHL-1.0 license. It is a 2-layer board measuring 50.8 × 17.8 mm, with 14 components from 9 distinct parts.

Other key parts include the TL972. By type, the board carries 6 capacitors, 6 resistors and 1 IC.

It belongs with the audio and retro computing designs in this gallery.

From the project

External audio bypass preamplifier modboard for the Famicom

an open-source hardware external preamp modboard for the NES and FamiCom

A few months ago, I discovered the main source of noisy interference for the audio in the FamiCom, which is the hex inverter chip. The other signals passing through the hex inverter chip is the interference heard in the audio.

Therefore, to reduce the interference as much as possible, the APU pins and preamp circuit must be completely isolated from the hex inverter chip. This is where this modboard comes in.

Squeeki kleen Audio FC-rounded, from the project README
From the project README

Main components on the Squeeki kleen Audio FC-rounded

TL972

Squeeki kleen Audio FC-rounded bill of materials (BOM)

14 components, 9 distinct parts.

QtyPartRefs
1
TL972
U1
1
100K
RV1
2
0.1µ
C1, C4
2
1µ
C2, C3
1
100µ
C5
1
47p
C6
2
100
R1, R2
3
20K
R3, R5, R6
1
12K
R4

Squeeki kleen Audio FC-rounded design files

The KiCad project lives in the Gumball2415/squeeki-kleen-Audio-FC repository on GitHub; these links point at the commit this page was built from.

Squeeki kleen Audio FC-rounded: common questions

How big is the Squeeki kleen Audio FC-rounded PCB?

The Squeeki kleen Audio FC-rounded measures 50.8 × 17.8 mm, has 2 copper layers and is 0.8 mm thick.

How many components are on the Squeeki kleen Audio FC-rounded?

14 components, from 9 distinct parts. The full bill of materials is listed on this page.

Where can I download the Squeeki kleen Audio FC-rounded design files?

From the Gumball2415/squeeki-kleen-Audio-FC repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Squeeki kleen Audio FC-rounded design in my own project?

Yes, under the terms of its TAPR-OHL-1.0 license, which Gumball2415 chose for the repository.

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