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Next-FDC

OldWer·Next-FDC

Next-FDC PCB layout, top view — open source board by OldWer
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About the Next-FDC PCB

Next-FDC is an open source PCB design by OldWer, published on GitHub under the CC0-1.0 license. It is a 2-layer board measuring 96.7 × 81.5 mm, with 48 components from 29 distinct parts.

Other key parts include the 74LS04, UPD765, SED9420, 74LS00 and 74HC138. By type, the board carries 14 resistors, 13 capacitors, 7 ICs, 5 connectors, 4 diodes and 3 switches.

It belongs with the test & measurement designs in this gallery.

From the project

A floppy drive controller for the ZX Spectrum Next

All these buttons can be used when the computer is switched on (obviously not in the middle of a disk operation). ## General remarks To use two IBM floppy drives, please use a floppy cable with the twist. To use a Gotek and an IBM drive, set the Gotek to DS1 and use a cable with the twist. Please note that to use HD floppies you have to cover the HD hole (e.g. with a piece of self-adhesive tape). Many thanks to Allen Albright and Tim Gilberts from the ZX Spectrum Next FB group, who had helped me with configuring the Next to support the FDC. If in doubt, contact me at oldwer@op.pl, I will be…

Next-FDC, from the project README
From the project README

Main components on the Next-FDC

74LS04UPD765SED942074LS0074HC13874HC74

Next-FDC bill of materials (BOM)

48 components, 29 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
74LS04
U1, U5
1
UPD765
U2
1
SED9420
U3
1
74LS00
U4
1
74HC138
U6
1
74HC74
U7
1
16MHZ
16MHz
Y1
3
DRD_2A
J1, J2, J4
1
Floppy
J3
1
Power
J6
1
AB/BA
SW1
1
SIDE
SW2
1
READY
SW3
1
ZXBUS+2A/3`
Z1
2
1N4148
D1, D2
2
BAT85
D3, D4
1
22NF
22nF
C1
1
10NF
10nF
C2
2
10PF
10pF
C3, C4
1
1NF
1nF
C5
Show 9 more
QtyPartRefs
1
47NF
47nF
C6
7
100NF
100nF
C7, C8, C9, C10, C11, C12, C13
3
10K
R1, R3, R14
2
1K5
R2, R5
1
6K8
R4
1
33K
R6
1
68K
R7
1
1M
R8
5
680R
R9, R10, R11, R12, R13

Next-FDC design files

The KiCad project lives in the OldWer/Next-FDC repository on GitHub; these links point at the commit this page was built from.

Next-FDC: common questions

How big is the Next-FDC PCB?

The Next-FDC measures 96.7 × 81.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Next-FDC?

48 components, from 29 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Next-FDC design files?

From the OldWer/Next-FDC repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Next-FDC design in my own project?

Yes, under the terms of its CC0-1.0 license, which OldWer chose for the repository.

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