HardLabs

Fat bastard main

a-wai·fat_bastard·main/fat_bastard_main.kicad_pcb

Fat bastard main PCB layout, top view — open source board by a-wai

About the Fat bastard main PCB

Fat bastard main is an open source PCB design by a-wai, published on GitHub under the CERN-OHL-1.2 license. It is a 2-layer board measuring 195 × 50 mm, with 58 components from 43 distinct parts.

Other key parts include the OPA2134 and OPA134. By type, the board carries 21 resistors, 14 capacitors, 9 connectors, 4 diodes, 3 ICs and 1 relay.

It belongs with the audio designs in this gallery.

From the project

2-channels hybrid bass guitar preamplifier designed for highly saturated sound

This documentation describes Open Hardware and is licensed under the CERN OHL v.1.2.

You may redistribute and modify this documentation under the terms of the CERN OHL v.1.2. (http://ohwr.org/cernohl).This documentation is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY AND FITNESS FOR A PARTICULAR PURPOSE.

Main components on the Fat bastard main

OPA2134OPA134

Fat bastard main bill of materials (BOM)

58 components, 43 distinct parts.

QtyPartRefs
1
OPA2134
U1
2
OPA134
U2, U3
1
INPUT
J1
1
TO LD 12V
J2
1
TO LD IN
J3
1
TO LD GAIN
J4
1
TO LD OUT
J5
1
12V IN
J6
1
DI OUT
J7
1
FOOTSW
J8
1
OUTPUT
J9
1
FINDER-30.22
K1
1
500k-A
RV1
1
1M-B
RV2
2
100k-A
RV3, RV6
1
10k-B
RV5
1
1M-A
RV7
2
1N4007
D1, D2
1
LEAD
D3
1
PWR
D4
Show 23 more
QtyPartRefs
1
1.5n
C1
1
300p
C2
5
100n
C3, C5, C8, C9, C14
1
22n
C4
2
not fitted
C6, C11
1
1000µ
C7
1
100µ
C10
1
15n
C12
1
1µ
C15
2
2.2M
R1, R6
1
510k
R2
3
1M
R3, R14, R17
1
6.8k
R4
3
10k
R5, R11, R12
2
1k
R7, R19
1
10R
R8
1
2.2k
R9
1
33k
R10
1
47k
R13
2
1.8k
R15, R21
1
100k
R16
1
330k
R18
1
3.3k
R20

Fat bastard main design files

The KiCad project lives in the a-wai/fat_bastard repository on GitHub; these links point at the commit this page was built from.

Fat bastard main: common questions

How big is the Fat bastard main PCB?

The Fat bastard main measures 195 × 50 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Fat bastard main?

58 components, from 43 distinct parts. The full bill of materials is listed on this page.

Where can I download the Fat bastard main design files?

From the a-wai/fat_bastard repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Fat bastard main design in my own project?

Yes, under the terms of its CERN-OHL-1.2 license, which a-wai chose for the repository.

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