@gunrunnerjohn posted:Program both receivers to respond to the same keyfob. Wire each of four remote speakers through the 4-channel relay board. Program the remote relay board receiver in "Interlock" mode, that insures only one relay is on. If a different relay is turned on, all other relays are turned off.
Out of curiosity, let's say the application called for 5 (or more) stations.
Using the 4-channel relay board in interlock mode, do you know of a method to pair or daisy-chain multiple 4-channel receiver modules so they behave in the interlock mode? This would be a configuration where two separate 4-button fobs are required to access/activate (up to) 8 sounds.
And/or, in a cousin configuration, if one has an 8-channel transmitter fob (rather than two 4-channel fobs) can the receiver modules used in your MP3 board and your relay board be "taught" (when in Learn mode) such that one board responds to buttons 1-4 and the other board responds to buttons 5-8?
