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Kim-1-programmable memory

eduardocasino·kim-1-programmable-memory-card·hardware/kim-1-mtu/kim-1-programmable-memory.kicad_pcb

Kim-1-programmable memory PCB layout, top view — open source RP2040/RP2350 board by eduardocasino

About the Kim-1-programmable memory PCB

Kim-1-programmable memory is an open source RP2040/RP2350 PCB design by eduardocasino, published on GitHub under the MIT license. It is a 2-layer board measuring 107.5 × 75.4 mm, with 42 components from 23 distinct parts.

Its main chip is the PicoW, from the RP2040/RP2350 family. Other key parts include the LVC04, 74LVC1G38, 74LVC541, 74LVC245 and 74LVC1G27. By type, the board carries 17 resistors, 11 capacitors, 8 ICs, 3 connectors, 1 transistor and 1 switch.

From the project

KIM-1 Programmable Memory Board for the MTU Backplane

Thanks to Luciano Veronese, we now have a BOM and a component placement list for use with JLCPCB. They are under the docs folder.

Only the coaxial connector and the PicoW are missing, but they are very easy to solder.

Kim-1-programmable memory, from the project README
From the project README

Main components on the Kim-1-programmable memory

LVC0474LVC1G3874LVC54174LVC24574LVC1G27PicoW

Kim-1-programmable memory bill of materials (BOM)

42 components, 23 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
LVC04
U1, U7
1
74LVC1G38
U2
2
74LVC541
U3, U4
1
74LVC245
U5
1
74LVC1G27
U6
1
PicoW
U8
1
DMG2305UX
Q1
1
Conn_02x01
J1
1
VIdeo Out
J4
1
MICRO_SD_CARD_DET1
Micro_SD_Card_Det1
J5
1
C455245
RESET
SW1
1
C2286
FDC
D1
7
100NF
100nF
C1, C2, C4, C5, C6, C7, C11
1
C14663
100nF
C3
1
100NF
100nF
C8
1
100UF
100uF
C9
1
10UF
10uF
C10
3
3K3
R1, R2, R3
2
10K
R4, R7
6
47R
R8, R9, R10, R11, R17, R18
Show 3 more
QtyPartRefs
1
470R
R12
4
270R
R13, R14, R15, R16
1
150R
R19

Kim-1-programmable memory design files

The KiCad project lives in the eduardocasino/kim-1-programmable-memory-card repository on GitHub; these links point at the commit this page was built from.

Kim-1-programmable memory: common questions

What microcontroller does the Kim-1-programmable memory use?

The Kim-1-programmable memory is built around the PicoW, from the RP2040/RP2350 family.

How big is the Kim-1-programmable memory PCB?

The Kim-1-programmable memory measures 107.5 × 75.4 mm, has 2 copper layers and is 1.59 mm thick.

How many components are on the Kim-1-programmable memory?

42 components, from 23 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 Kim-1-programmable memory design files?

From the eduardocasino/kim-1-programmable-memory-card 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 Kim-1-programmable memory design in my own project?

Yes, under the terms of its MIT license, which eduardocasino chose for the repository.

Can I test firmware for the Kim-1-programmable memory without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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