TRS80 3D
palazzol·TRS80_3D·rambo/rambo.kicad_pcb
About the TRS80 3D PCB
TRS80 3D is an open source PCB design by palazzol, published on GitHub. It is a 2-layer board measuring 130.9 × 81.3 mm, with 37 components from 17 distinct parts.
Other key parts include the 74LS139, 74HCT273, 74LS191, AS6C4008-55PCN and 74HCT04. By type, the board carries 16 capacitors, 15 ICs, 3 connectors, 1 transistor, 1 switch and 1 resistor.

Main components on the TRS80 3D
TRS80 3D bill of materials (BOM)
37 components, 17 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 74LS139 | DIP-16_W7.62mm | U1, U15 |
| 1 | 74HCT273 | DIP-20_W7.62mm | U2 |
| 5 | 74LS191 | DIP-16_W7.62mm | U3, U4, U5, U6, U7 |
| 2 | AS6C4008-55PCN | DIP-32_W15.24mm | U8, U9 |
| 1 | 74HCT04 | DIP-14_W7.62mm | U10 |
| 1 | 74LS245 | DIP-20_W7.62mm | U11 |
| 1 | 74HCT00 | DIP-14_W7.62mm | U12 |
| 1 | 74LS85 | DIP-16_W7.62mm | U13 |
| 1 | 74HCT02 | DIP-14_W7.62mm | U14 |
| 1 | 2N7000 | TO-92_Inline | Q1 |
| 1 | Barrel_Jack_Switch | BarrelJack_GCT_DCJ200-10-A_Horizontal | J1 |
| 1 | USB_B | USB_B_OST_USB-B1HSxx_Horizontal | J2 |
| 1 | Conn_02x25_Odd_Even | PinHeader_2x25_P2.54mm_Vertical | J3 |
| 1 | SW_DIP_x04 | SW_DIP_SPSTx04_Slide_9.78x12.34mm_W7.62mm_P2.54mm | SW1 |
| 15 | 100nF | C_Disc_D3.8mm_W2.6mm_P2.50mm | C1, C2, C3, C4, C5, C6, C7, C8 +7 |
| 1 | 33uF | CP_Radial_D6.3mm_P2.50mm | C16 |
| 1 | 4.7K | R_Array_SIP5 | RN1 |
TRS80 3D design files
The KiCad project lives in the palazzol/TRS80_3D repository on GitHub; these links point at the commit this page was built from.
- Layoutrambo/rambo.kicad_pcb
- Schematicrambo/rambo.kicad_sch
TRS80 3D: common questions
How big is the TRS80 3D PCB?
The TRS80 3D measures 130.9 × 81.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the TRS80 3D?
37 components, from 17 distinct parts. The full bill of materials is listed on this page.
Where can I download the TRS80 3D design files?
From the palazzol/TRS80_3D repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the TRS80 3D design in my own project?
The repository has no license, so all rights stay with palazzol. Use it as a reference, and ask the author before reusing the design.