OtterX Ram Expansion
About the OtterX Ram Expansion PCB
OtterX Ram Expansion is an open source PCB design by hkzlab, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 52.8 × 40.4 mm, with 9 components from 4 distinct parts.
Other key parts include the AS6C4008-55PCN and 74AC139. By type, the board carries 4 ICs, 4 capacitors and 1 connector.
From the project
RAM Expansion for the OtterX (CommanderX16 compatible) computer
This card expands the RAM of your OtterX (a DIY CommanderX16 compatible) computer to 2MB!
Once You switch J27 to enable the external RAM and install this board, the computer will automatically detect the 2MB.
I take NO responsibility for what happens if you decide to build and use this card. Your computer might crash, catch fire or be destroyed in other nasty ways. You're encourauged to take what you deem fit from this, and use it in your projects!
Main components on the OtterX Ram Expansion
OtterX Ram Expansion bill of materials (BOM)
9 components, 4 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | AS6C4008-55PCN | SSOP-32_11.305x20.495mm_P1.27mm | U1, U2, U3 |
| 1 | 74AC139 | SO-16_3.9x9.9mm_P1.27mm | U4 |
| 1 | RAM Exp Connector | PinHeader_2x20_P2.00mm_Vertical | J1 |
| 4 | 100nF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C2, C3, C4 |
OtterX Ram Expansion design files
The KiCad project lives in the hkzlab/OtterX_Ram_Expansion repository on GitHub; these links point at the commit this page was built from.
- LayoutOtterX_RamExp.kicad_pcb
- SchematicOtterX_RamExp.kicad_sch
OtterX Ram Expansion: common questions
How big is the OtterX Ram Expansion PCB?
The OtterX Ram Expansion measures 52.8 × 40.4 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the OtterX Ram Expansion?
9 components, from 4 distinct parts. The full bill of materials is listed on this page.
Where can I download the OtterX Ram Expansion design files?
From the hkzlab/OtterX_Ram_Expansion repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the OtterX Ram Expansion design in my own project?
It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.