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Dear Brian, I'm so happy to see your reply.
I just tried the crude test as you have put it and the signal seems quite clean. So I guess there is no DC component in the data stream. Thanks a lot for your concern and guidance :smile: It proved to be extremely helpful.
Best regards,
John
Dear Friends,
Since I had a pretty serious health problem last year, I am returning to this thread after a very long gap. I have steadily recovered since then and now I would like to complete the little project I had begun during that time.
Both Brian and Fvm had suggested that I better...
Very informative link John, thank you very much for sharing it! I'd prefer not to take the fixed code route because the controls would then be just "ON" or "OFF". My PPM encoder uses a 10 bit ADC converter to sample each RC channel, which will give me exactly 1024 servo steps in between the "ON"...
Makes complete sense Brian. Transmitting the PWM really is a bad idea. I'll rewire my brain cells and do as you have proposed. I simply cannot convey with words how much you have helped me. Thank you dear Friend !
Dear Brian,
Just now I tried that on my radio and yes, your observation is very much correct ! There's hell of a lot of activity going on in that frequency. As you have mentioned, I too feel that the very same thing can happen with 315MHz. In that case what can I do to ensure a clean reception...
Problem solved ! ;-)
Yesterday when I fed the transmitter with a square wave and checked the output signal from the RWS-434 using a scope, I noticed a lot of distortion/noise in the received signal. I immediately knew something is not really ok with the RF module. Since I had another pair of...
Thanks for your response FvM,
Thus far I have been suggested to do the following two things.
1) Generate the PWM at the receiver side.
2) Apply square waves to the RF module and see how it responds.
Both of these are very useful suggestions. While generating the PWM at the receiver side will...
Thanks Brian,
I've actually experienced what you're talking about with my cheap E-Sky radio. On more than one occasion I have made the mistake of turning on the receiver before turning on the transmitter. Doing so causes all the servos connected to the receiver to go into fits. Thanks for...
Dear Goldsmith,
Thanks for responding so quickly :wink: What you have suggested is a good idea. I'll give it a sine or 50 % square wave and see whether it gets transmitted over.
Supposing it does get transmitted then what do I do? Any suggestions on how I could get my PWM across. Do you feel...
Hello Friends ;-),
I have successfully programmed a PIC12F628 to generate a 1 ms to 2 ms RC PWM signal every 20 msecs. I'm able to change the pulse width of the PWM signal by turning a potentiometer knob.
Using radio frequency modules such as TWS-434 and RWS-434, I would like to transmit this...
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