Building a custom radio control transmitter requires two main electronics subsystems; an encoder to read the joystick signals and all the various switches and generate a signal to transmit this information, and an RF deck to send the information to the receiver. In addition a physical transmitter (case, switches, batteries, etc) is needed, generally builders are upgrading there favorite old systems using the MicroStar 2000 electronics found on this site.
The MicroStar 2000
This web site contains information that will allow you to build your own Radio Control system. The technical details you will find here represent almost 10 years of development. These developments have been focused on the electronics subsystems needed to build a R/C transmitter and receiver. The MicroStar 2000 was initially developed in 2000 and has been constantly updated and revised sense then. If you have any questions please contact me and I will do my best to help you with your project. I am always interested in hearing new ideas or features you would like to see in my systems so send me all your requests.
Thanks!