HardLabs

Memotron

inmbolmie·Memotron·kicad/memotron.kicad_pcb

Memotron PCB layout, top view — open source board by inmbolmie

About the Memotron PCB

Memotron is an open source PCB design by inmbolmie, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 104.9 × 81.8 mm, with 44 components from 17 distinct parts.

Other key parts include the TMS4256, CPC-EXP-PORT, 74LS157, 74LS74 and 74LS153. By type, the board carries 17 ICs, 17 capacitors, 3 jumpers, 3 resistors, 2 transistors and 1 connector.

It belongs with the retro computing designs in this gallery.

From the project

Retro-inspired DIY 256KB memory expansion for the Amstrad CPC 464 computers

Retro-inspired DIY 256KB memory expansion for the Amstrad CPC 464 computers

This is a clone of an original 1986 DK'Tronics 64/256KB memory expansion that is plugged into the expansion port of the CPC 464 computer. It is made as period-correct as possible regarding components and mechanical design, and at the same time it is possible to easily manufacture it at home as it uses only through-hole components.

Memotron, from the project README
From the project README

Main components on the Memotron

TMS4256CPC-EXP-PORT74LS15774LS7474LS15374LS17474LS27PAL16L874LS11

Memotron bill of materials (BOM)

44 components, 17 distinct parts.

QtyPartRefs
8
TMS4256
IC1, IC2, IC3, IC4, IC5, IC6, IC7, IC8
1
CPC-EXP-PORT
U1
2
74LS157
U2, U3
1
74LS74
U4
1
74LS153
U5
1
74LS174
U6
1
74LS27
U7
1
PAL16L8
U8
1
74LS11
U9
2
Q_NPN_CEB
Q1, Q2
1
Conn_02x25_Odd_Even
J1
2
Jumper_2_Open
JP1, JP2
1
Silicon disk enable
JP3
1
D
D1
16
100nF
C1, C2, C3, C4, C5, C6, C7, C8 +8
1
56pF
C15
3
680
R1, R2, R3

Memotron design files

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

Memotron: common questions

How big is the Memotron PCB?

The Memotron measures 104.9 × 81.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Memotron?

44 components, from 17 distinct parts. The full bill of materials is listed on this page.

Where can I download the Memotron design files?

From the inmbolmie/Memotron repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Memotron design in my own project?

Yes, under the terms of its GPL-3.0 license, which inmbolmie chose for the repository.

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