BREAD Loaf
About the BREAD Loaf PCB
BREAD Loaf is an open source PCB design by FHafting, published on GitHub. It is a 2-layer board measuring 35.4 × 50.7 mm, with 32 components from 16 distinct parts.
Other key parts include the LTC4311ISC6-TRMPBF, AP63205WU-7 and PCA9306. By type, the board carries 12 resistors, 4 jumpers, 4 capacitors, 3 ICs, 3 transistors and 2 connectors.
From the project
This project is fully documented in the paper: Shane Oberloier, Nicholas G. Whisman, Finn Hafting, Joshua M. Pearce, Open Source Framework for a Broadly Expandable and Reconfigurable Data Acquisition and Automation Device (BREAD), ''HardwareX'', 2023, e00467, https://doi.org/10.1016/j.ohx.2023.e00467.
All case designs can be found on Onshape: https://cad.onshape.com/documents/f4c13a5c0b1f8d88ed1f5752/w/29d0c0346ddaeb06e16ff42f/e/1077373224ada363d171e3fe?renderMode=0&uiState=65d3aad45b82c32cb51ae4c9
Main components on the BREAD Loaf
BREAD Loaf bill of materials (BOM)
32 components, 16 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LTC4311ISC6-TRMPBF | SOT-363_SC-70-6 | U1 |
| 1 | AP63205WU-7 | TSOT-23-6 | U2 |
| 1 | PCA9306 | SSOP-8_2.95x2.8mm_P0.65mm | U3 |
| 3 | BSS138 | SOT-23 | Q1, Q2, Q3 |
| 1 | THING_PLUS_LOGICAL | ESP_THING_PLUS | J2 |
| 1 | PPPC101LGBN-RC | PinSocket_1x10_P2.54mm_Horizontal | J6 |
| 1 | Heatsink_Pad | Thermal Pad | HS1 |
| 4 | ~ | SMT-JUMPER_2_NC_TRACE_SILK | JP1, JP2, JP3, JP4 |
| 2 | Stand_off | STAND-OFF | ST1, ST2 |
| 1 | 4.7uH | L_1210_3225Metric | L1 |
| 3 | 22uF | C_1206_3216Metric | C1, C3, C4 |
| 1 | 100nF | C_1206_3216Metric | C2 |
| 7 | 10k | R_0603_1608Metric | R1, R2, R3, R4, R5, R6, R7 |
| 1 | 200k | R_0603_1608Metric | R8 |
| 2 | 4.7k | R_0603_1608Metric | R9, R11 |
| 2 | 2.2k | R_0603_1608Metric | R10, R12 |
BREAD Loaf design files
The KiCad project lives in the FHafting/BREAD repository on GitHub; these links point at the commit this page was built from.
BREAD Loaf: common questions
How big is the BREAD Loaf PCB?
The BREAD Loaf measures 35.4 × 50.7 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the BREAD Loaf?
32 components, from 16 distinct parts. The full bill of materials is listed on this page.
Where can I download the BREAD Loaf design files?
From the FHafting/BREAD repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the BREAD Loaf design in my own project?
The repository has no license, so all rights stay with FHafting. Use it as a reference, and ask the author before reusing the design.
