Attiny powered RF remote for a wireless doorbell
Arduino CoffeeScript PHP Python
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Permalink
Failed to load latest commit information.
api Add project files Aug 16, 2015
firmware Add project files Aug 16, 2015
hardware Add project files Aug 16, 2015
hubot Add project files Aug 16, 2015
img Add project files Aug 16, 2015
signal-recordings Add project files Aug 16, 2015
LICENSE Initial commit Aug 9, 2015
README.md Change intro text in readme Aug 16, 2015

README.md

Tiny Doorbell Remote

These are the project files (hardware schematic and Arduino firmware code) for a small remote-control module that acts as an auxiliary remote to a wireless doorbell.

PCB module

Hardware

Schematic

The hardware is built around the Attiny85 IC and a cheap 434 RF link transmitter.

A Fritzing schematic is in the hardware folder.

The circuit runs on a single 3V battery and consumes

  • 65 μA while on standby mode
  • 7.5mA while transmitting

Estimated battery lifetime: at least 60 days.

Signal

Signal comparison: original doorbell remote vs replicated signal

The decoded signal for my doorbell was 0000111010011100 (or 0E9C in hex). The original and replicated signal recordings are in the signal-recordings folder. Open them with Audacity.

API

There are some general guidelines and files in the api directory for creating a HTTP POST endpoint on a Raspberry Pi, to control the module via the web.

Links

Licence

MIT