HardLabs

Doorwatch

GermanTinkerguy·Doorwatch·Hardware/KiCAD/Reverse Engineering - AT90USB162.kicad_sch

This repository ships a schematic but no board layout.

About the Doorwatch PCB

Doorwatch is an open source AVR/Arduino PCB design by GermanTinkerguy, published on GitHub. It is a board, with 34 components from 12 distinct parts.

Its main chip is the AT90USB162-16A, from the AVR/Arduino family. By type, the board carries 13 capacitors, 13 resistors, 4 switches, 3 connectors and 1 IC.

From the project

Starting with hardware hacking using a salvaged pcb as doorwatch. The pcb is partly reversed engineered.

Main components on the Doorwatch

AT90USB162-16A

Doorwatch bill of materials (BOM)

34 components, 12 distinct parts.

QtyPartRefs
1
AT90USB162-16A
U1
1
ISP Connector
J2
1
USB A
J3
1
01x10 Shielded Connector
J4
4
SW_Reed
SW1, SW2, SW3, SW4
13
C
C1, C2, C3, C4, C5, C6, C7, C8 +5
5
10 kΩ
R1, R5, R6, R7, R8
2
47 kΩ
R2, R3
1
R
R4
2
22 Ω
R9, R10
2
0 Ω
R11, R12
1
100 kΩ
R13

Doorwatch design files

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

Doorwatch: common questions

What microcontroller does the Doorwatch use?

The Doorwatch is built around the AT90USB162-16A, from the AVR/Arduino family.

How many components are on the Doorwatch?

34 components, from 12 distinct parts. The full bill of materials is listed on this page.

Where can I download the Doorwatch design files?

From the GermanTinkerguy/Doorwatch repository on GitHub, which has the schematic; the links under Design files point to each one.

Can I use the Doorwatch design in my own project?

The repository has no license, so all rights stay with GermanTinkerguy. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Doorwatch 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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