Tandy-Color-Computer-Multi-Pak
About the Tandy-Color-Computer-Multi-Pak PCB
Tandy-Color-Computer-Multi-Pak is an open source PCB design by djtersteegc, published on GitHub under the MIT license. It is a 2-layer board measuring 203.4 × 139.1 mm, with 62 components from 32 distinct parts.
Other key parts include the 74LS367, 74LS245, 74LS374, GAL16V8 and 74LS30. By type, the board carries 22 capacitors, 15 ICs, 10 resistors, 8 connectors, 4 jumpers and 2 diodes.
From the project
Respin of the Tandy 26-3024 Multi-Pak (MPI) for the DIY builder.
Inspired by the work of TheLittleEngineers, this is my respin of the Tandy 26-3024 Multi-Pak (MPI). It's targeted at the DIY builder so the schematic is pretty much straight out of the Tandy service manual with all THT parts, minus the power section (more on that later). The board size has been reduced as much as possible, and I added two LED's to indicate power to the MPI and Coco to minimize accidental unplugging when still powered up. The cart slots are numbered one to four, front to back, like a real MPI, but are rotated 90 degrees so the cart labels face forward. This was mainly done to…
Main components on the Tandy-Color-Computer-Multi-Pak
Tandy-Color-Computer-Multi-Pak bill of materials (BOM)
62 components, 32 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 5 | 74LS367 | DIP-16_W7.62mm_Socket | U1, U3, U6, U7, U9 |
| 1 | 74LS245 | DIP-20_W7.62mm_Socket | U2 |
| 1 | 74LS374 | DIP-20_W7.62mm_Socket | U4 |
| 1 | GAL16V8 | DIP-20_W7.62mm_Socket | U8 |
| 1 | 74LS30 | DIP-14_W7.62mm_Socket | U10 |
| 1 | 74LS153 | DIP-16_W7.62mm_Socket | U11 |
| 1 | 74LS368 | DIP-16_W7.62mm_Socket | U12 |
| 1 | 74LS139 | DIP-16_W7.62mm_Socket | U13 |
| 1 | 74LS74 | DIP-14_W7.62mm_Socket | U14 |
| 2 | AMS1117-5.0 | SOT-223-3_TabPin2_Ext_Thermal | U15, U16 |
| 1 | Barrel_Jack | BarrelJack_Horizontal | J1 |
| 1 | MICRO USB | SWITCHCRAFT_RAHMB20AUETR | J2 |
| 1 | USB-C | GCT_USB4125-GF-A_REVA2 | J4 |
| 1 | PCB EDGE | CoCo 40p PCB Cart Connector | P1 |
| 1 | SLOT1 | Coco 40p Cart Edge Connector | P2 |
| 1 | SLOT2 | Coco 40p Cart Edge Connector | P3 |
| 1 | SLOT3 | Coco 40p Cart Edge Connector | P4 |
| 1 | SLOT4 | Coco 40p Cart Edge Connector | P5 |
| 2 | Plug / Reg | SolderJumper-3_P1.3mm_Open_Pad1.0x1.5mm_NumberLabels | JP1, JP2 |
| 1 | +12V | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP3 |
Show 12 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | -12V | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP4 |
| 1 | ~ | SK24D02VG4 2P4T Slide Switch | SW1 |
| 2 | LED | LED_D3.0mm | D1, D2 |
| 2 | 68PF 68pF | C_Disc_D4.7mm_W2.5mm_P5.00mm | C1, C2 |
| 1 | 220PF 220pF | C_Disc_D4.7mm_W2.5mm_P5.00mm | C3 |
| 13 | 0.1UF 0.1uF | C_Disc_D4.7mm_W2.5mm_P5.00mm | C4, C5, C6, C7, C8, C9, C10, C11 +5 |
| 4 | 22uf 10V | CP_EIA-3528-12_Kemet-T_Pad1.50x2.35mm_HandSolder | C17, C20, C21, C22 |
| 2 | 100uF 16V | CP_Radial_D6.3mm_P2.50mm | C18, C19 |
| 4 | 10K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2, R3, R4 |
| 2 | 4K7 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R5, R6 |
| 2 | 470R | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R7, R8 |
| 2 | 5.1K | R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R9, R10 |
Tandy-Color-Computer-Multi-Pak design files
The KiCad project lives in the djtersteegc/Tandy-Color-Computer-Multi-Pak repository on GitHub; these links point at the commit this page was built from.
Tandy-Color-Computer-Multi-Pak: common questions
How big is the Tandy-Color-Computer-Multi-Pak PCB?
The Tandy-Color-Computer-Multi-Pak measures 203.4 × 139.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Tandy-Color-Computer-Multi-Pak?
62 components, from 32 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 Tandy-Color-Computer-Multi-Pak design files?
From the djtersteegc/Tandy-Color-Computer-Multi-Pak 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 Tandy-Color-Computer-Multi-Pak design in my own project?
Yes, under the terms of its MIT license, which djtersteegc chose for the repository.