Is this a simple RC buddy box system ?? Answered
I have recently resurrected my interest in Radio Control Aircraft. When I was teaching I ran an after school club to build and fly RC aeroplanes - However it is very hard for youngsters to pick up the skills without excessive crashes.
There is a system to over come this - The buddy box system available on many of the high end RC transmitters. 2 compatible transmitters are linked with a cord one is the master and one the slave. The operation of the master slave is by a switch on the master system.
Now all of these radios are relatively expensive - £100s. where you can buy relatively cheap equipment without this facility for £30 or less.
As far as I can tell the signal on the buddy box cord is a PWM signal which is passed serially from the slave into the master processor to proved the stick position information from the slave.
My question is will the much simpler cct below work or have I missed something in my though process.
I propose to cut the 5 volt line to the sticks in the master and insert a DPST switch This switches the 5 volts to the slave system which is un-powered. With 6 lines - 4 signal 1 +5 volts and 1 ground line I can provide the necessary position signals to drive the master transmitter.
If necessary I can fit a DPDT switch and cut the ground line as well.
Flicking the switch back will give control back to the master by switching the +5 volts.
If this looks OK I will get another transmitter and do the modification - Have I missed something obvious here.