Msemtd HomeAuto
Michael's Home Instrumentation
- New porch doors have required me to rethink my doorbell!
- We can't hear people knocking on the door
- The people at the door don't know if the old doorbell actually rang
- The old wireless doorbell often didn't ring because the batteries were flat!
- The wireless doorbell didn't require drilling holes in the doorframe - this is a plus
- the 12V battery in the wireless doorbell pushbutton was expensive!
I want to do something simple with the old wireless doorbell and start to develop an extensible home automation/instrumentation project. I have a Nanode and a number of Xinos which I intend to connect on a 4-wire bus around the house.
The old doorbell
Push-button:
- PCB labelled "RL-09 04.04.23"
- Battery 12V A23S "Replaces: 23A, MS21/MN21" A23 on WP cheap 10x pack
- IC1: LP801/V8
Chime unit:
- PCB labelled "RL-09B 04.02.27"
- Batteries 4.5V, 3xAA
- IC2: LP816A
http://www.alldatasheet.com/view.jsp?Searchword=HCF4069UBE
The Nanode - Xino 4-wire Bus
Using a Nanode at my internet gateway router and communicating with and powering multiple slave Xinos on a 4-wire bus...
http://wiki.hackspace.org.uk/wiki/Project:Nanode/Applications#Using_the_Local_Serial_Bus
http://sustburbia.blogspot.com/2010/08/wired-network-for-arduinos.html
Read nanode MAC address: -
https://gist.github.com/1020951#file_nanode_mac.pde
MAC Address Read Test MAC address is 00:04:A3:03:DD:C7
The soil moisture tester
Do these plants need watering?
http://www.instructables.com/id/Garduino-Gardening-Arduino/
Temperature
I have a bag of surplus 47k thermistors and I intend to build a number of circuits to measure temperature starting with the very simplest and culminating in a teachable HackSpace project with reasonable accuracy.
The component: Future Electronics B4090K Thermistor 47k 5%