KIM-1 RAMpager
About the KIM-1 RAMpager PCB
KIM-1 RAMpager 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 123.4 × 134.6 mm, with 65 components from 33 distinct parts.
Other key parts include the 74HCT245, 74HCT541, 74LS145, 74HCT688 and 74HCT573. By type, the board carries 17 capacitors, 15 ICs, 14 resistors, 8 diodes, 4 connectors and 2 transistors.
From the project
This repository is a mirror of https://codeberg.org/hkzlab/KIM-1_RAMpager , go there for the latest updates.
Any use of this project is under your own responsibility. You will be responsible of checking the correct construction and functionality of your board. By using this project You will agree that I cannot be held responsible if it will destroy any of your devices, damage your computer, burn down your house or whatever.
This board was tested with a KIM-1 clone designed by Eduardo Casino, plus the MTU motherboard by the same author.
Main components on the KIM-1 RAMpager
KIM-1 RAMpager bill of materials (BOM)
65 components, 33 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74HCT245 | DIP-20_W7.62mm_LongPads | U1 |
| 4 | 74HCT541 | DIP-20_W7.62mm_LongPads | U2, U3, U4, U10 |
| 2 | 74LS145 | DIP-16_W7.62mm_LongPads | U5, U6 |
| 1 | 74HCT688 | DIP-20_W7.62mm_LongPads | U7 |
| 2 | 74HCT573 | DIP-20_W7.62mm_LongPads | U8, U9 |
| 2 | AS6C4008-55PCN | DIP-32_W15.24mm_LongPads | U11, U12 |
| 1 | GAL22V10 | DIP-24_W7.62mm_LongPads | U13 |
| 1 | 74HCT240 | DIP-20_W7.62mm_LongPads | U14 |
| 1 | 74LS133 | DIP-16_W7.62mm_LongPads | U15 |
| 2 | 2N7000 | TO-92_HandSolder | Q1, Q2 |
| 1 | EDGE_CONN | EDGE_CONN | X1 |
| 1 | Control Ports Base | PinHeader_2x14_P2.54mm_Vertical | J1 |
| 1 | RAM Block Address | PinHeader_2x14_P2.54mm_Vertical | J2 |
| 1 | INT/EXT Battery | PinHeader_1x03_P2.54mm_Vertical | J3 |
| 1 | EXT Battery | PinHeader_1x02_P2.54mm_Horizontal | J4 |
| 1 | CR2032 | BatteryHolder_MYOUNG_BS-07-A1BJ001_CR2032 | BT1 |
| 1 | DECODE | PinHeader_1x02_P2.54mm_Vertical | JP1 |
| 1 | K7 | PinHeader_1x02_P2.54mm_Vertical | JP2 |
| 1 | Control Ports Offset | SW_DIP_SPSTx08_Slide_9.78x22.5mm_W7.62mm_P2.54mm | SW1 |
| 1 | RAM Low | LED_D5.0mm | D1 |
Show 13 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | RAM High | LED_D5.0mm | D2 |
| 1 | Control I/O | LED_D5.0mm | D3 |
| 1 | WR Pulse | LED_D5.0mm | D4 |
| 1 | RD Pulse | LED_D5.0mm | D5 |
| 2 | BAT86 | D_DO-41_SOD81_P10.16mm_Horizontal | D6, D9 |
| 1 | 1N5817/PMEG2010ER | D_DO-41_SOD81_P10.16mm_SOD123W | D7 |
| 15 | 100nF | C_Disc_D4.3mm_W1.9mm_P5.00mm | C1, C2, C3, C4, C5, C6, C7, C8 +7 |
| 1 | 47uF | CP_Radial_D6.3mm_P2.50mm | C15 |
| 1 | 22uF | CP_Radial_D6.3mm_P2.50mm | C16 |
| 2 | 10K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2 |
| 6 | 1K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3, R4, R5, R6, R7, R10 |
| 2 | 100K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R8, R9 |
| 4 | 3K3 | R_Array_SIP9 | RN1, RN2, RN3, RN4 |
KIM-1 RAMpager design files
The KiCad project lives in the hkzlab/KIM-1_RAMpager repository on GitHub; these links point at the commit this page was built from.
- LayoutKIM-1_Paged_SRAM.kicad_pcb
- SchematicKIM-1_Paged_SRAM.kicad_sch
KIM-1 RAMpager: common questions
How big is the KIM-1 RAMpager PCB?
The KIM-1 RAMpager measures 123.4 × 134.6 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the KIM-1 RAMpager?
65 components, from 33 distinct parts. The full bill of materials is listed on this page.
Where can I download the KIM-1 RAMpager design files?
From the hkzlab/KIM-1_RAMpager repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the KIM-1 RAMpager 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.