HardLabs

Monodiffuse

elixpo·monodiffuse·hardware/diffuino_selector/diffuino_selector.kicad_pcb

Monodiffuse PCB layout, top view — open source AVR/Arduino board by elixpo

About the Monodiffuse PCB

Monodiffuse is an open source AVR/Arduino PCB design by elixpo, published on GitHub under the MIT license. It is a 2-layer board measuring 35.8 × 34 mm, with 46 components from 21 distinct parts.

Its main chip is the ARDUINO_UNO_Q, from the AVR/Arduino family. Other key parts include the 74AHC1G32, 74AHC1G08 and 74AHC1G04. By type, the board carries 18 resistors, 11 capacitors, 6 switches, 5 diodes, 4 ICs and 1 transistor.

From the project

Controlled experiments in one-bit diffusion: native binary-weight training, PTQ/QAT ablations, calibrated evaluation, packed checkpoints, and reproducible edge-AI research.

This KiCad project documents the hardware selector used by Diffuino. Four switches present a BCD value to Arduino UNO Q pins D2--D5. A validity network allows the generate button to reach D6 only for decimal values 0--9, and a separate reset button drives D7.

VALID = NOT(BCD3 AND (BCD2 OR BCD1)) D6 = GENERATE_BUTTON AND VALID

BCD0 does not participate in validation because values 10--15 are identified by BCD3 together with either BCD2 or BCD1.

Main components on the Monodiffuse

74AHC1G3274AHC1G0874AHC1G04

Monodiffuse bill of materials (BOM)

46 components, 21 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
74AHC1G32
U1
2
74AHC1G08
U2, U4
1
74AHC1G04
U3
1
2N3904
Q1
1
ARDUINO_UNO_Q
J1
1
BCD3
SW1
1
BCD2
SW2
1
BCD1
SW3
1
BCD0
SW4
1
GENERATE
SW5
1
RESET
SW6
1
BCD3
D1
1
BCD2
D2
1
BCD1
D3
1
BCD0
D4
1
GREEN
D5
4
10nF
C1, C2, C3, C4
6
100nF
C5, C6, C7, C8, C9, C10
1
10uF
C11
7
10k
R1, R2, R3, R4, R13, R15, R17
Show 1 more
QtyPartRefs
11
1k
R5, R6, R7, R8, R9, R10, R11, R12 +3

Monodiffuse design files

The KiCad project lives in the elixpo/monodiffuse repository on GitHub; these links point at the commit this page was built from.

Monodiffuse: common questions

What microcontroller does the Monodiffuse use?

The Monodiffuse is built around the ARDUINO_UNO_Q, from the AVR/Arduino family.

How big is the Monodiffuse PCB?

The Monodiffuse measures 35.8 × 34 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Monodiffuse?

46 components, from 21 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Monodiffuse design files?

From the elixpo/monodiffuse repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Monodiffuse design in my own project?

Yes, under the terms of its MIT license, which elixpo chose for the repository.

Can I test firmware for the Monodiffuse 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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