Finally received the 2nd remote, and luckily it's on a different frequency which makes things easy. Now I can switch on the required model, run it, switch it off, select the next model in the TX, switch it on and run that. I could have kept using 2 different TXs, but this was more of a challenge, (not sure which is easier, pushing buttons or just picking up another TX. You can always edit it out, but a 'one stop shop' would be smoother if you don't have an assistant.
The 2 RXs in the models are bound to the 9X TX. I haven't hooked up the second relay for the brushed ESC in the test, as it's not necessary to test the idea (does the same as the switch) I'll be taking the power for the relays from smaller batteries (only requires 5v) I could take power from the main battery, but would want to run a VR or UBEC (more wire😐) Relay can supposedly use from 5 to 30V, but I prefer to go with the minimum voltage which works, for safety.
Using a brushless plane ESC in the boat, and a Quicrun brushed car/boat ESC in the truck, I have to make sure that the throttle is right down when I turn the boat off, so when I swap models and turn the truck on, nothing happens till I move the throttle to the center, as it's FNR),- then it arms. Could turn the boat off, change models and put the stick to center, and it would arm straight away when turned on, but it's an added safety feature, giving you time to engage brain.😁
There would be a small drain on the batteries when the relay is operated in OFF mode (N/O) so an independent source is desirable, depending on how long one model is OFF, (better than a drain on the main battery) I could set the boat relay to N/O (uses on/on on/off button on remote) as a security in case the battery runs down, then the relay, if in the N/O for off, would close and start the boat. Better that than a cold swim.😁
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