256 word memory
About the 256 word memory PCB
256 word memory is an open source PCB design by ibm2030, published on GitHub. It is a 2-layer board measuring 220 × 160 mm, with 36 components from 27 distinct parts.
Other key parts include the 74LS05, 74LS07, 74LS00, DM9602 and 74LS93. By type, the board carries 19 ICs, 5 connectors, 5 capacitors and 5 resistors.
From the project
EDUC-8 recreation by Gwyllym Suter
Main components on the 256 word memory
256 word memory bill of materials (BOM)
36 components, 27 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74LS05 | DIP-14_W7.62mm | U1 |
| 1 | 74LS05 74LS01 | DIP-14_W7.62mm | U2 |
| 1 | 74LS05 D2115 | DIP-16_W7.62mm | U3 |
| 1 | 74LS07 74LS157 | DIP-16_W7.62mm | U4 |
| 1 | 74LS07 7496 | DIP-16_W7.62mm | U5 |
| 1 | 74LS00 74LS95 | DIP-14_W7.62mm | U6 |
| 2 | 74LS05 74LS00 | DIP-14_W7.62mm | U7, U11 |
| 1 | 74LS00 D2115 | DIP-16_W7.62mm | U8 |
| 1 | 74LS00 7496 | DIP-16_W7.62mm | U9 |
| 1 | DM9602 74LS95 | DIP-14_W7.62mm | U10 |
| 1 | 74LS00 | DIP-14_W7.62mm | U12 |
| 1 | 74LS93 | DIP-14_W7.62mm | U13 |
| 3 | 74LS00 | DIP-14_W7.62mm | U14, U15, U17 |
| 1 | 74LS05 | DIP-14_W7.62mm | U16 |
| 1 | 74LS04 | DIP-14_W7.62mm | U18 |
| 1 | 74LS01 | DIP-14_W7.62mm | U19 |
| 1 | Conn_01x02_Male | JST_XH_S2B-XH-A_1x02_P2.50mm_Horizontal | J1 |
| 1 | Conn_01x03_Male | JST_XH_S3B-XH-A_1x03_P2.50mm_Horizontal | J2 |
| 1 | CONN_01X16_FEMALE 16-way-pcb-edge-Educ-8-connectors | PCB_16pin | J3 |
| 1 | CONN_01X04_FEMALE Conn_01x01_Male | Pin_D1.0mm_L10.0mm | J4 |
Show 7 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CONN_01X04_FEMALE 32-way-pcb-edge-Educ-8-connectors | PCB_32pin | J5 |
| 2 | Card_handle | Card_handle | H1, H2 |
| 2 | 100NF 47nF | C_Disc_D5.0mm_W2.5mm_P5.00mm | C1, C5 |
| 1 | 47UF 47nF | C_Disc_D5.0mm_W2.5mm_P5.00mm | C2 |
| 1 | 1NF 47nF | C_Disc_D5.0mm_W2.5mm_P5.00mm | C3 |
| 1 | 100PF 47nF | C_Disc_D5.0mm_W2.5mm_P5.00mm | C4 |
| 5 | 180R 820R | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R3, R4, R5 |
256 word memory design files
The KiCad project lives in the ibm2030/EDUC8 repository on GitHub; these links point at the commit this page was built from.
256 word memory: common questions
How big is the 256 word memory PCB?
The 256 word memory measures 220 × 160 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 256 word memory?
36 components, from 27 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 256 word memory design files?
From the ibm2030/EDUC8 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 256 word memory design in my own project?
The repository has no license, so all rights stay with ibm2030. Use it as a reference, and ask the author before reusing the design.
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