HardLabs

Megadesk

gcormier·megadesk·pcb/megadesk.kicad_pcb

Megadesk PCB layout, top view — open source AVR/Arduino board by gcormier
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About the Megadesk PCB

Megadesk is an open source AVR/Arduino PCB design by gcormier, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 41.7 × 32.2 mm, with 23 components from 13 distinct parts.

Its main chip is the ATTINY841-SSUR, from the AVR/Arduino family. Other key parts include the 7812, HT7550-1 and MCP2003B. By type, the board carries 7 resistors, 6 capacitors, 4 ICs, 3 diodes, 2 connectors and 1 buzzer.

It belongs with the iot & wireless and wearables designs in this gallery.

From the project

Open-source IKEA Bekant controller board

You can now use the megadesk companion if you want to integrate it with your smarthome.

You should also check out Megadesk Companion for a plug and play esphome solution.

More information in Serial.md. There's also specific details on esphome.

This allows you to specify custom values for the minimum and maximum height of your desk. This is useful if you have things stored underneath, or maximum height limitations (shelf on the wall).

Megadesk, from the project README
From the project README

Main components on the Megadesk

7812HT7550-1ATTINY841-SSURMCP2003B

Megadesk bill of materials (BOM)

23 components, 13 distinct parts.

QtyPartRefs
1
7812
U1
1
HT7550-1
U2
1
ATTINY841-SSUR
ATtiny841-SS
U3
1
MCP2003B
U4
1
A100308TR-ND
FFC
J2
1
Interface
J4
1
PKMCS0909E4000-R1
Buzzer
BZ1
2
1N4148WSFSCT
1N4148
D1, D2
1
SMF33A
D3
3
220pF
C1, C2, C6
3
0.1uF
C3, C4, C5
4
1k
R1, R2, R6, R7
3
4.7k
R3, R4, R5

Megadesk design files

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

Megadesk: common questions

What microcontroller does the Megadesk use?

The Megadesk is built around the ATTINY841-SSUR, from the AVR/Arduino family.

How big is the Megadesk PCB?

The Megadesk measures 41.7 × 32.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Megadesk?

23 components, from 13 distinct parts. The full bill of materials is listed on this page.

Where can I download the Megadesk design files?

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

Can I use the Megadesk design in my own project?

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

Can I test firmware for the Megadesk 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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