Hi All,
I'm a relativley novice yet ambitous electronics.. guy. Normally I don't like to reach out online for help but I thought in this instance it might be the the best case in this scenario as I have hit a brick wall.
I recently picked up a transmitter/reciever pair that runs on 433Mhz. I have these hooked up to an Arduino Uno:
- VCC 3.3v
- D4 to Data on Transmitter (or ADAT)
- Data O/P from Reciever back to Arduino on A0
I have the Arduino code cycling pin 4 on and off with a 2 sec delay. Yet reading the input back to the Arduino shows no indication of High or Low.
I admit I probably fried my first pair as I mistakenly followed a guide online (Arduino Basics: 433 MHz RF module with Arduino Tutorial 1 ) without realising the picture of the Reciever was back to front (VCC to GND, GND to VCC). Whilst testing I left the Reciever in this state for a good number of minutes. Touching the IC on the Reciever burnt my thumb so Im pretty sure its "cooked". However the reading back to the Arduino was in the 870 range when monitored on Serial. Though never wavering from 870.
I bought a second pair of identical reciever/transmitter modules. Wired it up the same way (without getting the polarity wrong) and the feedback to Arduino never gets higher than 10. You can see from the attached images that the two modules are close to each other, surely I should be seeing some fluctuations? I havent attached an antenna, is this all it could be? I've read in places that its not necessary at close range. I've also read that 3.3v is more reliable than 5v+.What am I doing wrong? Any assistance is greatley appreciated.
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