HardLabs

Dropin

Spaceboards·SpaceboardsHardware·Keyboards/Pancake/V2/kicad/dropin.kicad_pcb

Dropin PCB layout, top view — open source AVR/Arduino board by Spaceboards

About the Dropin PCB

Dropin is an open source AVR/Arduino PCB design by Spaceboards, published on GitHub under the CERN-OHL-W-2.0 license. It is a 2-layer board measuring 234 × 68 mm, with 115 components from 16 distinct parts.

Its main chip is the ATmega32U4-MU, from the AVR/Arduino family. By type, the board carries 49 switches, 48 diodes, 7 capacitors, 6 resistors, 2 connectors and 1 IC.

It belongs with the keyboards designs in this gallery.

From the project

A collection of open source hardware that has been designed by Spaceboards

4x12 Choc v1 Ortho ultra low profile keyboard

Dropin, from the project README
From the project README

Main components on the Dropin

ATmega32U4-MU

Dropin bill of materials (BOM)

115 components, 16 distinct parts.

QtyPartRefs
1
ATmega32U4-MU
U1
1
16MHz
Y1
1
USB4085-GF-A_REVA
J1
1
OLED
P1
1
500mA
F1
46
SW_SPST
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +38
2
SW_SPST
SW37, SW43
1
SW_Push
SW50
48
D_Small
D1, D2, D3, D4, D5, D6, D7, D8 +40
2
22pF
C1, C2
1
1uF
C3
3
0.1uF
C4, C5, C6
1
10uF
C7
2
10k
R1, R6
2
5.11k
R2, R5
2
22
R3, R4

Dropin design files

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

Dropin: common questions

What microcontroller does the Dropin use?

The Dropin is built around the ATmega32U4-MU, from the AVR/Arduino family.

How big is the Dropin PCB?

The Dropin measures 234 × 68 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Dropin?

115 components, from 16 distinct parts. The full bill of materials is listed on this page.

Where can I download the Dropin design files?

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

Can I use the Dropin design in my own project?

Yes, under the terms of its CERN-OHL-W-2.0 license, which Spaceboards chose for the repository.

Can I test firmware for the Dropin 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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