Breadbee
About the Breadbee PCB
Breadbee is an open source PCB design by breadbee, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 32 × 30 mm, with 76 components from 28 distinct parts.
Other key parts include the msc313e, spinor, ea3036c, ch340e and tvsarray. By type, the board carries 38 capacitors, 23 resistors, 5 ICs, 4 connectors, 3 inductors and 2 diodes.
It belongs with the dev boards & breakouts and sensors designs in this gallery.
From the project
Breadboard-able Cortex A7 dev board
A very small, 32mm x 30mm, ARM Cortex A7 development board that costs about ~$10 to make in low quantities and can be assembled at home with a cheap hot air rework station. With a small adapter socket it can be mounted vertically in a standard breadboard.
The breadbee is based on a relatively unknown IP camera SoC, the MSC313E, from a company called MStar (now part of MediaTek as a subsidiary called SigmaStar). You might have never heard of MStar but you probably have one of their chips in your TV.
Main components on the Breadbee
Breadbee bill of materials (BOM)
76 components, 28 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | msc313e | QFN-80_EP_8x8_Pitch0.35mm | U1 |
| 1 | spinor | wson8-8x6mm | U2 |
| 1 | ea3036c | UQFN-20-1EP_3x3mm_P0.4mm_EP1.85x1.85mm_ThermalVias | U3 |
| 1 | ch340e | MSOP-10_3x3mm_P0.5mm | U4 |
| 1 | tvsarray | SOT-23-6 | U5 |
| 1 | Crystal_GND24 | Crystal_SMD_Abracon_ABM8G-4Pin_3.2x2.5mm | Y1 |
| 1 | HR961160C | HR961160C | J1 |
| 1 | Conn_02x12_Odd_Even | PinHeader_2x12_P2.54mm_Vertical | J2 |
| 1 | USB_B_Micro | USB-MICRO-B | J3 |
| 1 | Conn_01x21 | PinHeader_1x21_P1.00mm_Vertical | J4 |
| 2 | LED_Small | LED_0805_2012Metric | D1, D2 |
| 3 | L | L_Taiyo-Yuden_MD-2020 | L1, L2, L3 |
| 20 | 1uf | C_0402_1005Metric | C1, C6, C11, C12, C13, C14, C15, C18 +12 |
| 3 | 220pf | C_0402_1005Metric | C2, C3, C4 |
| 5 | C | C_0402_1005Metric | C5, C9, C10, C16, C17 |
| 2 | 18pf | C_0402_1005Metric | C7, C8 |
| 6 | 10uf | C_0402_1005Metric | C23, C28, C29, C30, C31, C32 |
| 2 | 100nf | C_0402_1005Metric | C33, C34 |
| 1 | 200k | R_0402_1005Metric | R1 |
| 5 | 100k | R_0402_1005Metric | R2, R3, R18, R21, R22 |
Show 8 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 150k | R_0402_1005Metric | R4 |
| 1 | 510k | R_0402_1005Metric | R5 |
| 1 | 110K | R_0402_1005Metric | R6 |
| 1 | 1.1m | R_0402_1005Metric | R7 |
| 3 | 1m | R_0402_1005Metric | R8, R19, R20 |
| 5 | R | R_0402_1005Metric | R9, R10, R11, R12, R17 |
| 4 | 22 | R_0402_1005Metric | R13, R14, R15, R16 |
| 1 | 1.2m | R_0402_1005Metric | R23 |
Breadbee design files
The KiCad project lives in the breadbee/breadbee repository on GitHub; these links point at the commit this page was built from.
- Layoutbreadbee.kicad_pcb
Breadbee: common questions
How big is the Breadbee PCB?
The Breadbee measures 32 × 30 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Breadbee?
76 components, from 28 distinct parts. The full bill of materials is listed on this page.
Where can I download the Breadbee design files?
From the breadbee/breadbee repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Breadbee design in my own project?
Yes, under the terms of its GPL-3.0 license, which breadbee chose for the repository.
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