HardLabs

Snark barker

schlae·snark-barker

Snark barker PCB layout, top view — open source board by schlae

About the Snark barker PCB

Snark barker is an open source PCB design by schlae, published on GitHub. It is a 2-layer board measuring 231.1 × 106.7 mm, with 193 components from 74 distinct parts.

Other key parts include the NE558, 74LS245, 74LS244, TEA2025B and LM324. By type, the board carries 89 capacitors, 44 resistors, 30 ICs, 4 connectors, 3 inductors and 2 switches.

It belongs with the audio designs in this gallery.

From the project

A 100% compatible replica of the famed SB 1.0 sound card

The Snark Barker is a 100% compatible clone of the famed SB 1.0 "Killer Card" sound card from 1989. It implements all the features, including the digital sound playback and recording, Ad Lib compatible synthesis, the joystick/MIDI port, and the CMS chips (which are actually Philips SAA1099 synthesizer devices).

All of the components are readily available. In the bill of materials, Mouser part numbers are listed where they are available. Chips not available from Mouser can be purchased from a variety of sources in China.

Snark barker, from the project README
From the project README

Main components on the Snark barker

NE55874LS24574LS244TEA2025BLM324LM39374LS138YM3812YM3014BNJM3403AMC1408_DIP805XSAA109974LS0874LS13974LS37474LS7474LS12574LS3274LS14

Snark barker bill of materials (BOM)

193 components, 74 distinct parts.

QtyPartRefs
1
NE558
U1
1
74LS245
U2
1
74LS244
U3
1
TEA2025B
U4
1
LM324
U5
1
LM393
U6
2
74LS138
U7, U8
1
YM3812
U9
1
YM3014B
U10
1
NJM3403A
U11
1
MC1408_DIP
U12
1
805X
U13
2
SAA1099
U14, U15
3
74LS08
U16, U25, U28
1
74LS139
U17
2
74LS374
U18, U19
4
74LS74
U20, U22, U23, U26
1
74LS125
U21
3
74LS32
U24, U27, U30
1
74LS14
U29
Show 54 more
QtyPartRefs
1
Bus_ISA_8bit
J1
1
Bracket Mount
J2
1
Joystick/MIDI
P1
1
L7809
P2
1
DMA ENABLE JUMPER
DRQ1
1
I/O ADDX
IO1
4
Conn_02x01
IRQ2, IRQ3, IRQ5, IRQ7
1
JOYSTICK EN
JP1
1
Microphone
MIC1
1
2.2K
RP1
2
1K
RP2, RP3
2
Conn_01x03
RXD1, TXD1
1
OUT
S1
1
ALPS_RK08H_DUAL
S2
2
2N3904
T1, T2
1
12MHz
XTL1
3
5.1V
ZD1, ZD2, ZD3
2
1N4148
D1, D2
3
?
L1, L2, L3
13
10uF 16V
C1, C14, C30, C38, C39, C42, C43, C44 +5
2
47uF 16V
C2, C13
7
100uF 16V
C3, C7, C12, C15, C17, C18, C40
2
470uF 16V
C4, C11
31
0.1u
C5, C6, C8, C9, C10, C16, C19, C33 +23
10
0.01u
C20, C21, C22, C23, C24, C25, C26, C27 +2
7
1000p
C31, C36, C37, C49, C54, C63, C78
5
330p
C32, C35, C52, C64, C79
1
47
C41
3
2200p
C51, C58, C60
1
4700p
C57
1
47p
C59
2
30p
C61, C62
2
270p
C65, C68
1
680p
C66
1
470p
C67
2
270
R1, R2
9
10K
R3, R4, R8, R23, R24, R34, R36, R37 +1
3
470K
R5, R9, R12
3
68K
R6, R7, R11
1
39K
R10
1
39.0K 1%
R13
1
100.0K 1%
R14
2
470
R15, R16
1
33K
R17
1
1.5K 1%
R18
3
390
R19, R20, R21
3
27K
R22, R25, R27
5
4.7K
R26, R39, R41, R42, R44
2
15K
R28, R31
2
47K
R29, R30
2
1.5K
R32, R33
1
2.2K
R35
1
2.70K 1%
R38
1
1K
R43

Snark barker design files

The KiCad project lives in the schlae/snark-barker repository on GitHub; these links point at the commit this page was built from.

Snark barker: common questions

How big is the Snark barker PCB?

The Snark barker measures 231.1 × 106.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Snark barker?

193 components, from 74 distinct parts. The full bill of materials is listed on this page.

Where can I download the Snark barker design files?

From the schlae/snark-barker repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Snark barker design in my own project?

The repository has no license, so all rights stay with schlae. Use it as a reference, and ask the author before reusing the design.

Similar boards