I've just bought a 433Mhz digital transmitter/receiver set and tried to wire them up using the pi. Unfortunately my electronic skills are very basic and now my receiver gives me a "pulsing" signal (like every 500ms a LED is shortly switched on). Here you can see my current setting:
At the top you can see the three pins of the receiver module. GROUND, DATA and, VDC. I connected VDC and GROUND directly to the corresponding pins on the pi. For the DATA pin it is written in the manual, that you can get the transmitted signal from GROUND and DATA. So, I am not sure if my setting is correct. The pulldown is for the GPIO pin so that it's state can be clearly identified (I hope that I understood that right). Is that a wrong resistor? On my recv module there is a ic with the printing "2904D JRC D142A". Maybe that helps identifying the problem?
As far as I know, there is no timer, I have to transmit the signal myself e.g. by using the Manchester Code.
Aside from that, when moving the recv module the LED is blinking weirdly, too. Do you know why?
EDIT: And when sending a 1, the LED goes on for like 500ms and then slowly turns off. Why is that? :)