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| Newer page: | version 3 | Last edited on Sunday, November 28, 2004 12:19:50 am | by AristotlePagaltzis | |
| Older page: | version 2 | Last edited on Friday, June 7, 2002 1:06:43 am | by perry | Revert |
@@ -1,297 +1 @@
-Home Electrical Device Control HOWTO
-!!!Home Electrical Device Control HOWTO
-!Rui Li
-
-ruili@worldnet.att.net
-
-
-
-__Joy Yokley - __Coverted document from Linuxdoc to !DocBook v4.1 (SGML).
-
-
-
-2002-02-12
-
-
-__Revision History__Revision .0072002-02-12Revised by: RLRevision .0062001-06-27Revised by: JEYRevision .0052001-06-13Revised by: RLRevision .0042001-06-12Revised by: JEY
-
-
-
-
-
-This HOWTO will tell you how to use Linux to control your home electrical
-devices. You will only need to make a very
-simple circuit to control almost any kind of electrical
-device using Linux!
-
-
-
-
-
-----; __Table of Contents__; 1. Introduction; 2. System Requirement; 3. Electronic Circuit; 4. Examples of Relays; 5. Special Thanks; 6. Copyright and License
-!!!1. Introduction
-
-Many people asked me, "Is it possible to control some electrical
-stuff
[[e.g. lights, radio, tv, etc.
] by using a home computer?" The answer is YES.
-The process is very easy, and anyone can do it.
-
-
-
-After I read the Coffee Machine Mini-HOWTO, I got an idea of how to control
-my home electrical appliances. I made some modifications on the circuit discussed in that
-Coffee Machine Mini-HOWTO, and wrote a simple program. The circuit can
-control many small electrical devices.^_^ You can use __crontab__
-to set your lights to come on automatically or to turn on your airconditioner. I use it to control my VCR and VCD ( I do still need some modification on VCR/VCD).
-By writing a simple program, you can control everything over the web. You can use
-telnet with SSH and your telephone dial in to control all the appliances you have on the circuit.
-
-
-
-This circuit is VERY SIMPLE. Even if you don't know anything
-about circuits, you can set up this circuit.
-
-----
-!!!2. System Requirement
-
-Get any computer that is running Linux and has a working parallel port. :)
-I'm using a 386DX with 4MB RAM 40MB HD.
-You will need gcc to compile the program. If you want to use telnet or SSH,
-you will also need telnetd or sshd. You can write your own
-program by using ioperm and outb. If you would like to
-use my program, you will need g++.
-
-
-
-Click the following link to download my program. You will need g++ to compile it.
- home.att.net/~ruili/goldencat/paralle.tar.gz.
-
-----
-!!!3. Electronic Circuit
-
-The data line of the parallel port can provide between 0 and 5 volts.
-Therefore, we can use this line to control a relay and let that relay control
-an electrical device.
-
-
-
-Use pins 2 through 9 to get +5V
-
-
-
-Use pins 18 through 25 as the Ground
-
-
-
-____________________________________________________________
-/ \
-\ 13 12 11 10 9 8 7 6 5 4 3 2 1 /
-\ /
-\ 25 24 23 22 21 20 19 18 17 16 15 14 /
-\______________________________________________________/
-| Vcc for Relay
-|
-|
-/ -------+--------| |---------|
-P data 4.7K B / c | 1N4002 |_| |-------
------------/\/\/\/\---------+-----| NPN _____ | relay |home device
-| \ e /_\ |-| |-------
-LED X \ +--------| |---------|
-P Ground | | |
-----------------------------+-------+--------+
-Relay Ground |
----------------------------------------------+
-
-
-Below is the key to the diagram above:
-
-
-P data parallel port data line(pin 2 to pin 9, use any)
-P Ground parallel port ground (pin 18 to pin 25, use any)
-Vcc depends on the type of your relay. I'm using 12VDC
-Relay Ground the ground for 12VDC
-4.7k 4.7K resistor
-NPN C2235 NPN transistor
-1N4002 1N4002 diode
-LED light emitting diode
-relay a coil relay
-
-+5 volts from parallel port will turn on the relay. Once the relay is on,
-the device connected to that relay will be on. When the parallel port's data
-line goes back to , it will turn off the relay, and device is off.
-
-----
-!!!4. Examples of Relays
-
-The diagrams below are used to explain how relays work.
-
-
-
-The relay itself is just a switch as seen in the diagram below:
-
-
-relay power off relay power on
-|3 |3
-| |
-| |
-o o
-\ |
-o \ o
-| |
-| |
-| |
-|4 |4
-
-
-The diagram below demonstrates the setup of a 4 pin relay.
-
-
-
-____________________________
-| |
-1 | | 3
------|---------s o----------|-------
-| coil s \switch |
-2 | s \ | 4
------|---------s o- \-------|-------
-| |
-| |
-| |
-|__________________________|
-
-
- In the diagram above, pin 3 and pin 4 are disconnected by default.
-When you send +12V between pin 1 and pin 2,
-it will turn on a switch, and pin 3 and 4 are now connected.
-
-
-
-
-The following is a 5 pin relay:
-
-
-
-_______________________________
-| |
-1 | | 5
----------|---+ o------------|----------------
-| |-----------/---- s |
-| / s |
-3 | / s |
----------|-----------o/ coil s | 4
-| o---s-------|----------------
-| | |
-| | |
-2 | | |
-----------|---------------------+ |
-|_____________________________|
-
- In the above diagram pin 3 is connected to pin 5, by default.
-By sending +12V between pin 1 and pin 2, you will
-will turn on a switch. Pin 1 and pin 2 will disconnect,
-and pin 5 and pin 4 will connect.
-
-
-
- relay power off relay power on
-|5 |5
-| |
-| |
-o o
-\ |
-o \ o o
-| o | |
-| | | |
-| | | |
-4| |3 4| |3
-
-Some relays may have more that 5 pins. More pins just means there are more switches.
-
-
-
-I wrote a simple program that can control 8 relays. The program is available at the following location and
-will need g++ in order to be able to use this program.
-http://home.att.net/~ruili/goldencat/paralle.tar.gz
-
-
-
-A complete circuit can control up to eight relays, that means that a complete circuit can control
-eight different devices. You will need a DB25 connector. Using a parallel
-switch cable, connect this relay board to your computer. I put the relay board in a box
-and use a parallel switch cable to connect it to my Linux box:
-
-
-Panel: LED, Switch Back: DB25 connector
-
-Below is an example of how a relay board would connect with your electrical device:
-
-
- CONNECTED RELAY BOARD
-+-----+ power outlet
-1 _______3 | __|________ || ||
---| |---------+ | | | || ||
-2 |relay|4 | (o) (o) | _||___||__
---|_____|----+ |------|---| | |
-| | | |
-| +------------+ | | plug
-ground | | hot | |
-| | | |
-__|_|__ | |
-| | | | |________|
-| | | | plug
-| | | |
-|_|_|_| (i know it doesn't look like a plug, but it's a plug :-) )
-|| ||
-|| ||
-
-
- To connect the system, just connect your home electrical device to the power outlet. That is it!
-You don't need to make any change on the electrical device. And you can
-connect any kind of device to that power outlet. Plug this power outlet into any wall outlet.
-
-
-
-
-To see photos of what the finished product looks like, go to the following sites:
-
-
-
-
-
-
-*
-
-http://home.att.net/~ruili/goldencat/p1.jpg
-
-
-*
-*
-
-http://home.att.net/~ruili/goldencat/p2.jpg
-
-
-*
-*
-
-http://home.att.net/~ruili/goldencat/p3.jpg
-
-
-*
-
-The following URL shows a complete electronic circuit (control 8 devices):
-http://home.att.net/~ruili/goldencat/01.png
-
-----
-!!!5. Special Thanks
-
-Special thanks to Rufus Chang rufus@chu.url.com.tw.
-
-
-
-Special thanks to Chih-Wei Huang cwhuang@linux.org.tw.
-
-----
-!!!6. Copyright and License
-
-Copyright Rui Li 2000-2001. License is GNU GPL, but it is requested that
-you retain the author's name and email on all copies. Please keep my name and
-e-mail address when you are copying this HOWTO
.
+Describe
[HowToHomeElectricalControl
] here
.
