Lefty, the transmitter is going to go on the boat, to transmit data (temperatures, battery voltage etc) to a land based receiver. An arduino (hooked up to the receiver) will control an LCD or 7 seg displays to show the read data in the boat. The rest of the transmitter is missing, all that I have left is the module, does that mean I'll be generating a PPM signal to send to it?Correct. The following doc seems to say there is a serial PPM signal input for the RF module (yellow wire). Doesn't state the voltage level (3.3/5.0/or ?) for the PPM data bit stream, but it's something you can play with as it's a bit of a hack as I'm sure you are aware of. http://www.hobbyking.com/hobbyking/store/uploads/27644860X83512X38.pdf
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