HardLabs

Neopad

ivndbt·neopad

Neopad PCB layout, top view — open source AVR/Arduino board by ivndbt

About the Neopad PCB

Neopad is an open source AVR/Arduino PCB design by ivndbt, published on GitHub under the GPL-2.0 license. It is a 2-layer board measuring 99.2 × 88.3 mm, with 19 components from 8 distinct parts.

Its main chip is the ProMicro, from the AVR/Arduino family. By type, the board carries 8 diodes, 4 LEDs, 3 switches, 2 resistors and 1 IC.

It belongs with the keyboards designs in this gallery.

From the project

Neopad is a little macropad with four switches and two rotary encoders, made by through hole components only.

Neopad is a little macropad with four switches and two rotary encoders, made by through hole components only. It's designed to use QMK firmware. Actually the number of switches is six, because even the encoder are allowed to click.

The Neopad in the photo above is the first prototype with ultra light case made from biscuits cardboard. In this repo you can find the final revision including:

Neopad, from the project README
From the project README

Main components on the Neopad

ProMicro

Neopad bill of materials (BOM)

19 components, 8 distinct parts.

QtyPartRefs
1
ProMicro
U1
2
Rotary_Encoder_Switch
SW1, SW3
1
SW_MEC_5E
SW2
1
VAL**
mouse-bite-2.54mm-slot
4
MX-NoLED
MX1, MX2, MX3, MX4
6
D
D1, D2, D3, D6, D7, D8
2
LED
D4, D5
2
220
R1, R2

Neopad design files

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

Neopad: common questions

What microcontroller does the Neopad use?

The Neopad is built around the ProMicro, from the AVR/Arduino family.

How big is the Neopad PCB?

The Neopad measures 99.2 × 88.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Neopad?

19 components, from 8 distinct parts. The full bill of materials is listed on this page.

Where can I download the Neopad design files?

From the ivndbt/neopad repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Neopad design in my own project?

Yes, under the terms of its GPL-2.0 license, which ivndbt chose for the repository.

Can I test firmware for the Neopad 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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