This version of the RC toy car conversion is working much better. The previous had to have three batteries and the reed relays stuck in the closed position at times.
Sorry I don't have any spec's for the green LEDs they are surplus and only require 1.5ma to generate enough light to get the Cds to drop to 1500 ohms or less.
Enjoy! ..... Rolf
Link to the "The finished product"
http://www.pbase.com/sinoline/rf_remote_control_for_d7xx