modnexaremote
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====== Generic 433 MHz transmitter ====== | ====== Generic 433 MHz transmitter ====== | ||
The [[audioprotocoltransmitter | AudioProtocolTransmitter]] module, can encode digital protocols as audio signals from the sound card/audio output from a PC. To be able to transmit the signals, some kind of hardware is needed. This is a description of how to build a generic RF-transmitter working on the 433MHz band. | The [[audioprotocoltransmitter | AudioProtocolTransmitter]] module, can encode digital protocols as audio signals from the sound card/audio output from a PC. To be able to transmit the signals, some kind of hardware is needed. This is a description of how to build a generic RF-transmitter working on the 433MHz band. | ||
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Now any output from the sound card will be transmitted as a 433MHz signal, and we have a generic remote control transmitter! | Now any output from the sound card will be transmitted as a 433MHz signal, and we have a generic remote control transmitter! | ||
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+ | ===== Step 3, Package ===== | ||
There are many ways to hook this up to the computer. I used a cheap USB-headset converter as sound card, put the OP-Amp-circuit on a Veroboard and powered it from the USB-cable and finally put the whole pile into the box of an old WLAN-HUB. It looks ugly inside, but once I close the box I have a nice looking USB-connected generic 433MHz transmitter :-). | There are many ways to hook this up to the computer. I used a cheap USB-headset converter as sound card, put the OP-Amp-circuit on a Veroboard and powered it from the USB-cable and finally put the whole pile into the box of an old WLAN-HUB. It looks ugly inside, but once I close the box I have a nice looking USB-connected generic 433MHz transmitter :-). | ||
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+ | The circuit board to the right of the Veroboard is actually a receiver I tried to put in the same box. I had to give that up, since it is to sensitive to the electromagnetic noise from the USB. I had to use the [[modupm|UPM-recevier]] connected via a few meter cable to get away from the noise. |
modnexaremote.txt · Last modified: 2018/11/03 02:59 by 127.0.0.1