Msemtd HomeAuto: Difference between revisions
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* Batteries 4.5V, 3xAA | * Batteries 4.5V, 3xAA | ||
* IC2: LP816A | * IC2: LP816A | ||
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http://www.alldatasheet.com/view.jsp?Searchword=HCF4069UBE | http://www.alldatasheet.com/view.jsp?Searchword=HCF4069UBE | ||
Revision as of 20:24, 15 June 2011
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
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