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BREAD Slice

FHafting·BREAD·[SLC_RLHT] Relay Heating Element Controller/Hardware/BREAD_Slice.kicad_pcb

BREAD Slice PCB layout, top view — open source AVR/Arduino board by FHafting
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About the BREAD Slice PCB

BREAD Slice is an open source AVR/Arduino PCB design by FHafting, published on GitHub. It is a 2-layer board measuring 70 × 100 mm, with 43 components from 20 distinct parts.

Its main chip is the Arduino_Nano_v3.x, from the AVR/Arduino family. Other key parts include the TCMT1100 and MAX6675ISA+. By type, the board carries 18 connectors, 6 capacitors, 5 ICs, 5 inductors, 3 diodes and 2 fuses.

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 Slice

TCMT1100MAX6675ISA+Arduino_Nano_v3.x

BREAD Slice bill of materials (BOM)

43 components, 20 distinct parts.

QtyPartRefs
1
~
U1
2
TCMT1100
U2, U5
2
MAX6675ISA+
U3, U4
1
Arduino_Nano_v3.x
A1
1
Conn_01x10_Female
J1
1
I2C_01x04
J2
3
Term_PressFit_Phoenix_Contact
J3, J11, J12
1
Term_PressFit_Phoenix_Contact
J4
1
Term_PressFit_Phoenix_Contact
J5
11
Term_PressFit_Phoenix_Contact
J6, J7, J8, J9, J10, J13, J14, J15 +3
2
10A
F1, F2
1
Heatsink_Pad
HS1
2
G5Q-1
K1, K2
1
WS2812B_5050
D1
2
General_Purpose_Diode
D2, D3
4
Ferrite_Bead_Small
FB1, FB2, FB3, FB4
1
4.7uH
L1
3
22uF
C1, C3, C4
1
100nF
C2
2
0.01 uF
C5, C6

BREAD Slice 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 Slice: common questions

What microcontroller does the BREAD Slice use?

The BREAD Slice is built around the Arduino_Nano_v3.x, from the AVR/Arduino family.

How big is the BREAD Slice PCB?

The BREAD Slice measures 70 × 100 mm, has 2 copper layers and is 1.67 mm thick.

How many components are on the BREAD Slice?

43 components, from 20 distinct parts. The full bill of materials is listed on this page.

Where can I download the BREAD Slice 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 Slice 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.

Can I test firmware for the BREAD Slice without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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