GR8RAM
About the GR8RAM PCB
GR8RAM is an open source PCB design by garrettsworkshop, published on GitHub under the Custom license license. It is a 4-layer board measuring 100 × 59.8 mm, with 55 components from 15 distinct parts.
Other key parts include the EPM240T100C5N, W9825, W25Q128JVSIQ, 74AHC245PW and XC6206P332MR. By type, the board carries 34 capacitors, 11 ICs, 8 resistors, 1 connector and 1 switch.
From the project
8 MB RAMFactor-compatible Apple II memory expansion card
Main components on the GR8RAM
GR8RAM bill of materials (BOM)
55 components, 15 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | EPM240T100C5N | TQFP-100_14x14mm_P0.5mm | U1 |
| 1 | W9825 | TSOP-II-54_22.2x10.16mm_P0.8mm | U2 |
| 1 | W25Q128JVSIQ | SOIC-8_5.3mm | U3 |
| 4 | 74AHC245PW | TSSOP-20_4.4x6.5mm_P0.65mm | U4, U5, U6, U9 |
| 1 | XC6206P332MR | SOT-23 | U8 |
| 1 | 25M | Crystal_SMD_3225-4Pin_3.2x2.5mm | U13 |
| 2 | 74LVC1G125GW | SOT-353 | U14, U16 |
| 1 | JTAG | IDC-Header_2x05_P2.54mm_Vertical | J4 |
| 1 | FW | SW_DIP_SPSTx02_Slide_DSHP02TS_P1.27mm | SW1 |
| 7 | 10U 10u | C_0805 | C1, C2, C3, C4, C7, C10, C11 |
| 27 | 2U2 2u2 | C_0603 | C5, C12, C13, C14, C15, C16, C18, C19 +19 |
| 2 | 33 | R_0603 | R22, R31 |
| 2 | 22K 22k | R_0603 | R28, R29 |
| 3 | 4X33 4x33 | R4_0402 | RN1, RN2, RN3 |
| 1 | 4X10K 4x10k | R4_0402 | RN5 |
GR8RAM design files
The KiCad project lives in the garrettsworkshop/GR8RAM repository on GitHub; these links point at the commit this page was built from.
- LayoutGR8RAM.kicad_pcb
- SchematicGR8RAM.kicad_sch
- BOMgerber/GR8RAM-BOM.csv
GR8RAM: common questions
How big is the GR8RAM PCB?
The GR8RAM measures 100 × 59.8 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the GR8RAM?
55 components, from 15 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 GR8RAM design files?
From the garrettsworkshop/GR8RAM 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 GR8RAM design in my own project?
It is published under Custom license, which limits how it may be reused; read the license before building on it.