HardLabs

MEM

KALTCHUK·Z80_Modular_Computer·KiCAD files/Proton cards/MEM/MEM.kicad_pcb

MEM PCB layout, top view — open source board by KALTCHUK

About the MEM PCB

MEM is an open source PCB design by KALTCHUK, published on GitHub. It is a 2-layer board measuring 99.7 × 69.9 mm, with 28 components from 18 distinct parts.

Other key parts include the 74LS139, 74LS04, 74LS74, 74LS85 and SN74LS07N. By type, the board carries 8 capacitors, 7 ICs, 5 connectors, 4 diodes and 4 resistors.

It belongs with the retro computing designs in this gallery.

From the project

"Anyone who has brought up CP/M on a homebuilt computer has felt this moment of elation. A myriad of connections are properly closed; bits are flying at lightning speeds over busses and through circuits and program logic, to produce a single prompt". Gary Kildall

Main components on the MEM

74LS13974LS0474LS7474LS85SN74LS07N628128W27C512

MEM bill of materials (BOM)

28 components, 18 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
74LS139
U1
1
74LS04
U2
1
74LS74
U3
1
74LS85
U4
1
SN74LS07N
U5
1
628128
U6
1
W27C512
U7
1
card addr
J1
1
Power Bus
J2
1
Signal Bus
J3
1
RAM bank
J4
1
ROM block
J5
4
LED
D1, D2, D3, D4
1
10uF
C1
7
10nF
C2, C3, C4, C5, C6, C7, C8
2
10k
R1, R2
1
4x10k
RN1
1
4x220
RN2

MEM design files

The KiCad project lives in the KALTCHUK/Z80_Modular_Computer repository on GitHub; these links point at the commit this page was built from.

MEM: common questions

How big is the MEM PCB?

The MEM measures 99.7 × 69.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the MEM?

28 components, from 18 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 MEM design files?

From the KALTCHUK/Z80_Modular_Computer 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 MEM design in my own project?

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

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