Differences

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--- homehw [2010/09/27 21:31] – sestst
+++ homehw [2018/11/03 02:59] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+{{ :ir.jpg |Hardware}}
 ====== Home Built Hardware ======
 NetHomeServer can use the speaker audio output to send protocol signals for IR or Radio (RF) protocols. To actually send them as IR or RF, you need some kind of additional hardware that can transform them.
 In the same manner, the microphone input can be used to decode such protocols, and again you need some kind of hardware to receive them.
+Often you are already using your sound card, but there are very cheap USB sound cards that you can use like the one in the picture below:
-To use the microphone as an input, you need to adjust the incoming signal level to the sensitivity of the microphone and put a capacitor in series to block the DC component introduced by most microphone inputs. The capacitor C2 is usually not needed, it is intended to remove noice.
+{{ :analyzer:mic.jpg | USB-sound card}}
-{{:upm_scheme.png| Reception Circuit}}
+I have collected some examples of transmitters and receivers that I and other users have built. If you have built a good interface for transmission or reception, you can mail me the descriptions and I will publish them here.
-To use the speaker output for transmission, you need to amplify the low power AC signal to a normal digital signal level in order to use it. The following circuit is an example:
+[[homehwtrans|{{:remotecontrol64.png|Transmitters}}]][[homehwtrans|Transmitter Circuits]]
-{{:transmit.png| Transmission Circuit}}
+[[homehwrec|{{:radio64.png|Receiver}}]][[homehwrec|Receiver Circuits]]
+With a generic 433.92MHz OOK transmitter connected to the speaker output and the protocol drivers in NetHomeServer, you can control most of the radio controlled remote switches sold in Europe, for example: Nexa system, Chacon or Elro AB600.
-Fortunatly, building these interfaces is not very hard. You can do it by modifying existing devices or by using special built devices. Here are a few examples of devices I and some other users have built.
-===== Modifying existing devices =====
-  * [[modupm|Using the UPM thermometer as RF receiver for the 433.92MHz band]]
-  * [[modnexaremote|Using a Nexa remote control as generic 433.92MHz transmitter]]