HardLabs

LED-shield

RepRapLtd·AnalogueNeuralNet·Electronics/LED-shield/LED-shield.kicad_pcb

LED-shield layout, top view — open source AVR/Arduino board by RepRapLtd

About the LED-shield

LED-shield is an open source AVR/Arduino PCB design by RepRapLtd, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 68.6 × 53.3 mm, with 28 components from 9 distinct parts.

Its main chip is the Arduino_Uno_Shield, from the AVR/Arduino family. Other key parts include the PCA9622. By type, the board carries 21 resistors, 3 capacitors, 2 jumpers and 1 IC.

It belongs with the dev boards & breakouts designs in this gallery.

From the project

Project to make a photonic neural network using photochromic material for the synaptic weighting adjustments

This is a project to create a neuromorphic analoge neural network. I wanted to get away from using conventional computers (including parallel graphics processors) to do neural simulations and to make something that is a lot more like a real brain.

What I propose is similar to the early work on perceptrons by Rosenblatt from the 1950s that has now been all but abandoned because today it’s much easier to solve a problem by writing some software to do it than by designing and building some electronics to do it. Easier maybe, but at least today we have the advantage of 21st Century electronics.

LED-shield, from the project README
From the project README

Main components on the LED-shield

PCA9622

LED-shield bill of materials (BOM)

28 components, 9 distinct parts.

QtyPartRefs
1
PCA9622
U1
2
PINHD-1X12
JP4, JP5
1
Arduino_Uno_Shield
XA1
1
0.1u
C1
2
1u
C2, C3
2
10K
R1, R2
8
100R
R3, R5, R7, R10, R11, R13, R15, R17
8
68R
R4, R6, R9, R12, R14, R16, R18, R19
3
R
R8, R20, R21

LED-shield design files

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

LED-shield: common questions

What microcontroller does the LED-shield use?

The LED-shield is built around the Arduino_Uno_Shield, from the AVR/Arduino family.

How big is the LED-shield?

The LED-shield measures 68.6 × 53.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the LED-shield?

28 components, from 9 distinct parts. The full bill of materials is listed on this page.

Where can I download the LED-shield design files?

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

Can I use the LED-shield design in my own project?

Yes, under the terms of its GPL-3.0 license, which RepRapLtd chose for the repository.

Can I test firmware for the LED-shield 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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