BreadBin
About the BreadBin PCB
BreadBin is an open source PCB design by c0pperdragon, published on GitHub. It is a 2-layer board measuring 320 × 134.6 mm, with 45 components from 28 distinct parts.
By type, the board carries 4 capacitors, 4 resistors and 1 crystal.
It belongs with the dev boards & breakouts designs in this gallery.
From the project
A CPU made of 7400 logic on breadboards - inside a bread bin ;-)
After various experiments and failed attempts to design a 7400-based computer, I came to a quite minimalistic 8-bit approach which is nevertheless pretty versatile and can utilize a surprisingly large amount of memory resources. The CPU core itself executes its program from a static 64K flash memory and can access 32 bytes of internal RAM (which can be considered registers for all practical purposes). Access to the external memory area (up to 16MB of address space) allows addition of RAM, ROM and memory mapped IO. In the current setup this directly mirrors the capabilities of my OS816…
BreadBin bill of materials (BOM)
45 components, 28 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Crystal | Crystal_HC18-U_Vertical | Y1 |
| 2 | 74AC283 | DIP-16_W7.62mm | ADD1, ADD2 |
| 2 | 74AC08 | DIP-14_W7.62mm | AND1, AND2 |
| 2 | 74AC11 | DIP-14_W7.62mm | AND3, AND4 |
| 1 | 74HC138 | DIP-16_W7.62mm | DEC1 |
| 1 | 74HC541 | DIP-20_W7.62mm | GATE1 |
| 1 | 74HC245 | DIP-20_W7.62mm | IN1 |
| 1 | 74HC04 | DIP-14_W7.62mm | INV1 |
| 2 | 74HC574 | DIP-20_W7.62mm | IR1, OUT1 |
| 2 | Conn_01x08 | PinHeader_1x08_P2.54mm_Vertical | JIN1, JOUT1 |
| 1 | Conn_01x02 | PinHeader_1x02_P2.54mm_Vertical | JPOWER1 |
| 2 | 74AC00 | DIP-14_W7.62mm | LOGIC1, LOGIC2 |
| 2 | SST39SF040 | DIP-32_W15.24mm | MCODE1, ROM1 |
| 4 | 74AC153 | DIP-16_W7.62mm | MUX1, MUX2, MUX3, MUX4 |
| 5 | 74HC377 | DIP-20_W7.62mm | OP1, PC3, UA1, UB1, UC1 |
| 2 | 74HC32 | DIP-14_W7.62mm | OR1, OR2 |
| 2 | 74HC163 | DIP-16_W7.62mm | PC1, PC2 |
| 1 | AS6C4008 | DIP-32_W15.24mm | RAM1 |
| 1 | IDT71256 | DIP-28_W7.62mm | REG1 |
| 1 | 74HC164 | DIP-14_W7.62mm | RES1 |
Show 8 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | NE555 | DIP-8_W7.62mm | TIM1 |
| 2 | 33pF | C_Disc_D4.7mm_W2.5mm_P5.00mm | C1, C2 |
| 1 | 10uF | C_Disc_D4.7mm_W2.5mm_P5.00mm | C3 |
| 1 | 100uF | CP_Radial_D10.0mm_P5.00mm | C4 |
| 1 | 1k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1 |
| 1 | 1M | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R2 |
| 1 | 33k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R3 |
| 1 | 10k | R_Array_SIP9 | RN1 |
BreadBin design files
The KiCad project lives in the c0pperdragon/BreadBin repository on GitHub; these links point at the commit this page was built from.
- Layoutboard/board.kicad_pcb
BreadBin: common questions
How big is the BreadBin PCB?
The BreadBin measures 320 × 134.6 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the BreadBin?
45 components, from 28 distinct parts. The full bill of materials is listed on this page.
Where can I download the BreadBin design files?
From the c0pperdragon/BreadBin repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the BreadBin design in my own project?
The repository has no license, so all rights stay with c0pperdragon. Use it as a reference, and ask the author before reusing the design.
Similar boards
88 Pin Vag Breakout
rusefi
142 × 58 mm91 parts2LGPL-3.01.2k
134pin 7-967288-1
139.7 × 73.7 mm38 parts2LGPL-3.01.2k
Breakout 60pin EEC-IV
139.7 × 62.2 mm15 parts2LGPL-3.01.2k
Breakout 112pin Connector
174 × 58 mm39 parts2LGPL-3.01.2k
Eecv breakout
140.8 × 53.7 mm9 parts4LGPL-3.01.2k
Rj45 breakout
rene-dev
15.2 × 53.8 mm3 parts2LGPL-3.0979