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Betadisk clone

alvaroalea·betadisk-clone·betadisk/beta128_r0.3.kicad_pcb

Betadisk clone PCB layout, top view — open source board by alvaroalea
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About the Betadisk clone PCB

Betadisk clone is an open source PCB design by alvaroalea, published on GitHub. It is a 2-layer board measuring 99.7 × 149.9 mm, with 83 components from 44 distinct parts.

Other key parts include the L7805, 74LS245, W27C512, GAL22V10 and 74LS32. By type, the board carries 26 capacitors, 19 ICs, 19 resistors, 6 diodes, 4 jumpers and 3 switches.

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

From the project

Clone of the Beta 128 Disk Interface for ZX Spectrum

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

http://creativecommons.org/licenses/by-nc-sa/4.0/

BOM is probably not acurrate, gerbers have names wrong.

Even this interface provide a back conector for other interfaces, it do not provide a good IORQ signals, so can be incompatible with other interfaces that original interface is working good.

Betadisk clone, from the project README
From the project README

Main components on the Betadisk clone

L780574LS245W27C512GAL22V1074LS3274LS3074LS12374LS7474LS0774LS17474LS367FDC_MB887774LS1474LS13974LS0674LS16174LS00

Betadisk clone bill of materials (BOM)

83 components, 44 distinct parts.

QtyPartRefs
1
L7805
U1
1
74LS245
U2
1
W27C512
U3
1
GAL22V10
U4
1
74LS32
U5
1
74LS30
U6
1
74LS123
U7
2
74LS74
U8, U16
1
74LS07
U9
1
74LS174
U10
1
74LS367
U11
1
FDC_MB8877
U12
1
74LS14
U13
1
74LS139
U14
1
74LS06
U15
2
74LS161
U17, U18
1
74LS00
U19
1
BC639
Q1
1
8.000Mhz
Y1
1
ZX_Spectrum_Connector_GENERIC_SORTED
J1
Show 24 more
QtyPartRefs
1
Conn_02x17_Odd_Even
J2
1
Conn_01x03
JP1
1
a
JP2
1
Conn_02x02_Odd_Even
JP4
1
Conn_01x04_Male
JP5
1
10-XX
S1
1
255SB
S2
1
SW_DIP_x02
SW1
2
—
ZX-EDGE_2, ZX-EDGE_3
4
1N4148
D1, D2, D4, D15
2
LED
D3, D5
21
100n
C1, C4, C5, C103, C104, C106, C107, C108 +13
2
220u/16 V
C2, C3
1
10u/16 V
C6
1
33p
C7
1
100u/16 V
C8
4
10K
R1, R2, R13, R14
4
1K
R3, R15, R16, R17
1
120k
R4
2
5k6
R5, R7
1
470
R6
2
680
R8, R9
3
6k8
R18, R21, R22
2
2K2
R19, R20

Betadisk clone design files

The KiCad project lives in the alvaroalea/betadisk-clone repository on GitHub; these links point at the commit this page was built from.

Betadisk clone: common questions

How big is the Betadisk clone PCB?

The Betadisk clone measures 99.7 × 149.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Betadisk clone?

83 components, from 44 distinct parts. The full bill of materials is listed on this page.

Where can I download the Betadisk clone design files?

From the alvaroalea/betadisk-clone repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Betadisk clone design in my own project?

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

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