Tom-1
About the Tom-1 PCB
Tom-1 is an open source PCB design by tcr, published on GitHub. It is a 4-layer board measuring 127 × 127 mm, with 83 components from 28 distinct parts.
Other key parts include the 74HC697, 74LS377, 74LS245, 74LS00 and 74LS573. By type, the board carries 30 capacitors, 27 ICs, 10 connectors, 9 resistors, 2 switches and 2 diodes.
From the project
https://hackaday.io/project/171965-ttl-operation-module-tom-1
Main components on the Tom-1
Tom-1 bill of materials (BOM)
83 components, 28 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74HC697 | DIP-20_W7.62mm | IC4 |
| 2 | 74LS377 | DIP-20_W7.62mm | IC7, IC9 |
| 1 | 74LS245 | DIP-20_W7.62mm | U1 |
| 4 | 74LS00 | DIP-14_W7.62mm | U2, U3, U14, U15 |
| 1 | 74LS573 | DIP-20_W7.62mm | U4 |
| 3 | 74LS697 | DIP-20_W7.62mm | U6, U16, U17 |
| 1 | LM555xN | DIP-8_W7.62mm | U8 |
| 2 | 2KB_SRAM | DIP-24_W10.16mm | U10, U11 |
| 4 | 74LS283 | DIP-16_W7.62mm | U12, U13, U18, U19 |
| 1 | 27C1024 | DIP-40_W15.24mm_Socket | U20 |
| 4 | 74LS193 | DIP-16_W7.62mm | U21, U23, U24, U25 |
| 2 | CY62256 | DIP-28_W15.24mm | U22, U28 |
| 1 | KingBright_PSA08-11-MyParts | EightSegment | U27 |
| 1 | BC517 | TO-92_Inline | Q1 |
| 1 | Conn_02x06_Counter_Clockwise | PinSocket_2x06_P2.54mm_Vertical | J1 |
| 1 | USB Module | PinHeader_1x06_P2.54mm_Vertical | J2 |
| 8 | Conn_02x08_Top_Bottom | PinSocket_2x09_P2.54mm_Vertical | J4, J5, J6, J7, J8, J9, J10, J11 |
| 1 | Jumper_NC_Dual | PinHeader_1x03_P2.54mm_Vertical | JP1 |
| 1 | Conn_01x01_Male | PinHeader_1x01_P2.54mm_Vertical | PGM1 |
| 2 | SW_PUSH | SW_PUSH_6mm | SW1, SW2 |
Show 8 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | DIODE | D_DO-41_SOD81_P2.54mm_Vertical_AnodeUp | D1 |
| 1 | LED | LED_D3.0mm | D2 |
| 3 | C | C_Disc_D4.7mm_W2.5mm_P5.00mm | C1, C2, C3 |
| 26 | C | C_Disc_D3.0mm_W1.6mm_P2.50mm | C4, C5, C6, C7, C8, C9, C10, C11 +18 |
| 1 | 10uF | C_Disc_D3.0mm_W1.6mm_P2.50mm | C30 |
| 7 | R | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R1, R2, R3, R4, R7, R8, R9 |
| 1 | 1K | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R5 |
| 1 | 20K | R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | R6 |
Tom-1 design files
The KiCad project lives in the tcr/tom-1 repository on GitHub; these links point at the commit this page was built from.
- Layoutkicad/tom-1.kicad_pcb
Tom-1: common questions
How big is the Tom-1 PCB?
The Tom-1 measures 127 × 127 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Tom-1?
83 components, from 28 distinct parts. The full bill of materials is listed on this page.
Where can I download the Tom-1 design files?
From the tcr/tom-1 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Tom-1 design in my own project?
The repository has no license, so all rights stay with tcr. Use it as a reference, and ask the author before reusing the design.