Quote:
Originally Posted by The_Understated
Thanks for the link. I'll do some digging on the StackExchange forums and see what I can find. I'm thinking just a signal input to a relay should do the trick and eliminate the need for a digital processor. IE: press "snow" send signal to close relay for pin A, pressing again opens relay. Press "sport" closes relay for pin B, press again to open relay.
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It would actually take more than one component to do this. You can lock the relay in an "ON" state with just a signal by running a cable between the "ON" output and the signal input. However, to turn it back off, you need a NAND gate to read if the relay is on, and the momentary switch is pressed. Also, you'll need an AND circuit to determine if you are allowed to turn the relay on (reading the NAND gate and momentary switch) This will allow the signal to be interrupted. You'll also need a monostable circuit right after the "snow" switch to prevent flip-flopping of the circuit.
All in all, it's probably a lot easier to just get the chip for around a nickel and play with some resistors to get it running. You might be able to sub in an Arduino or Raspberry Pi, and do it all in code. I can do more scratch pad diagrams later if you're still interested on building the electronics yourself.