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ReSeed

SukkoPera·ReSeed

ReSeed PCB layout, top view — open source board by SukkoPera
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About the ReSeed PCB

ReSeed is an open source PCB design by SukkoPera, published on GitHub. It is a 2-layer board measuring 60.8 × 100 mm, with 55 components from 39 distinct parts.

Other key parts include the MOS_8580, CD74HCT4520E, 74HCT245, GAL16V8 and TL497ACN. By type, the board carries 21 capacitors, 14 resistors, 7 ICs, 4 connectors, 3 inductors and 2 transistors.

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

From the project

Sounds from C64 now for Plus/4!

ReSeed is an expansion card for the Commodore 16 and Plus/4 computers that allows interfacing the computer with a MOS 6581 or 8580 Sound Interface Device, the chip that is used to deliver audio on the Commodore 64.

It is based on a design by Solder of Synergy.

(Slight rewording of Solder's original description of the card.)

New component values for the step-up voltage regulator: The values of some components were fine-tuned (again) in order to place the switching frequency of the step-up voltage converter way out of the audio band. These new values can also be retrofitted on a V1 board and…

ReSeed, from the project README
From the project README

Main components on the ReSeed

MOS_8580CD74HCT4520E74HCT245GAL16V8TL497ACNLM7809STEPUP_MT3608

ReSeed bill of materials (BOM)

55 components, 39 distinct parts.

QtyPartRefs
1
MOS_8580
U1
1
CD74HCT4520E
U2
1
74HCT245
U3
1
GAL16V8
U4
1
TL497ACN
U5
1
LM7809
U6
1
STEPUP_MT3608
U105
1
BC549C
Q1
1
2SC1815
Q101
1
EDGE_CONNECTOR
CN1
1
AUDIO_OUT
CN2
1
AUDIO_IN
CN3
1
DB9_MALE
CN4
1
10k
RV1
1
1M
RV2
1
SW_DIGIFIX
SW1
1
LICENSE
V1
2
28C0236-0EW-10
FB1, FB2
1
100u
L1
2
22n
C1, C2
Show 19 more
QtyPartRefs
2
2.2n
C3, C4
1
1n
C5
2
470p
C6, C20
9
100n
C7, C9, C10, C11, C12, C13, C14, C17 +1
2
10u
C8, C21
1
100p
C15
1
1000u/25V
C16
1
100u/16V
C18
3
100
R1, R2, R11
2
1k
R3, R5
1
10k
R4
1
180k
R6
1
100k
R7
1
3.3 1%/0.5W
R8
1
12.7k 1%
R9
1
1.2k 1%
R10
1
100
RN1
1
4.7k
RN2
1
10k
RN3

ReSeed design files

The KiCad project lives in the SukkoPera/ReSeed repository on GitHub; these links point at the commit this page was built from.

ReSeed: common questions

How big is the ReSeed PCB?

The ReSeed measures 60.8 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ReSeed?

55 components, from 39 distinct parts. The full bill of materials is listed on this page.

Where can I download the ReSeed design files?

From the SukkoPera/ReSeed repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the ReSeed design in my own project?

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

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