doorbell

A basic, low power consumption, doorbell transmitter to replace or complement an existing system. Can be added to a letterbox, gate, cat flap or anything else.

Initially created for a Bliss brand doorbell Ref. DC6-FR-WH 656185, it can be easily transposed to any other system.

A big thanks to :

• sui77 for his rc-switch library.
• Saleae for the ability to decode protocols effortlessly.

Software implementation

Sleep mode : Power-down

Wake up on INT0 on pin PB2 change.

Use the timer1 as a tick generator to obtain compliant timings.

Libs

TimerOne-master

Hardware

• AA NiMh battery
• Plastic Battery Storage Case Box Holder For AA
• DC-DC boost converter module. Input voltage 0.9-5V. Output voltage 5V.
• ATTiny85
• STX882 ASK RF module 433mhz transmitter module

Schematic

TODO

Prototype

TODO

License