HardLabs

Oc DevKit2

SuperMechaCow·OpenCritter·hardware/oc_DevKit2/oc_DevKit2.kicad_pcb

Oc DevKit2 PCB layout, top view — open source AVR/Arduino board by SuperMechaCow

About the Oc DevKit2 PCB

Oc DevKit2 is an open source AVR/Arduino PCB design by SuperMechaCow, published on GitHub under the MIT license. It is a 2-layer board measuring 35 × 43 mm, with 39 components from 24 distinct parts.

Its main chip is the ATTINY84A-MMH, from the AVR/Arduino family. Other key parts include the CP2102N, MCP73831 and MIC5205. By type, the board carries 11 resistors, 8 capacitors, 6 switches, 4 ICs, 4 connectors and 3 diodes.

From the project

An open source digital pet

OpenCritter is an open source digital pet. The software is totally free, and the hardware easy to obtain.

Anyone is invited to work on the project for as long as they stick to the following principles:

- OpenCritter is for all levels of skill and expertise. Novices should be able to build their own from scratch, and experts can lead the project development. - OpenCritter is all-ages and gender nuetral. - OpenCritter is for makers and hackers. Create and destroy! - Mods are encouraged! But anything that conflicts with the "core experience" of the game should be listed as a new branch.

Main components on the Oc DevKit2

CP2102NMCP73831MIC5205ATTINY84A-MMH

Oc DevKit2 bill of materials (BOM)

39 components, 24 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
CP2102N
U1
1
MCP73831
U2
1
MIC5205
U3
1
ATTINY84A-MMH
U4
1
Motor
M1
1
I2C BUS
J3
1
USB_OTG
J4
1
IOPU SPI
J5
1
ESP
J6
1
3.7V
BT1
1
Buzzer
BZ1
1
GPIO0
SW1
1
RESET
SW2
1
Power
SW3
1
A
SW4
1
B
SW5
1
C
SW6
3
LED
D1, D2, D3
2
4.7uF
C1, C3
2
0.1uF
C2, C4
Show 4 more
QtyPartRefs
2
10uF
C5, C8
2
10uF
C6, C7
7
10K
R1, R2, R3, R9, R10, R11, R12
4
1K
R4, R5, R6, R7

Oc DevKit2 design files

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

Oc DevKit2: common questions

What microcontroller does the Oc DevKit2 use?

The Oc DevKit2 is built around the ATTINY84A-MMH, from the AVR/Arduino family.

How big is the Oc DevKit2 PCB?

The Oc DevKit2 measures 35 × 43 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Oc DevKit2?

39 components, from 24 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 Oc DevKit2 design files?

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

Can I use the Oc DevKit2 design in my own project?

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

Can I test firmware for the Oc DevKit2 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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