Is there a simple and cheap way to get a picaxe controlled setup for switching between analogue input.
There are 2 possible sources for 2 analogue inputs. I thought about using a DPDT read relay, or maybe 2 DPST reed relays. I have only been able to find DPDT ones that cost around £18. Having dual DPST sees kind of bulky, The only other option wold be opto-isolator. I have some 4N25 (I have tested these with analogue through puton the switched side and they seem fine), but 4 would be needed along with some logic to inverted one per channel making it as bulky, if not more, as dual reed relays. Its looking like I will only have one spare pin to operate the switch mechanism as well, maybe 2.
This is going to be a mobile device that may get dropped, so solid state is preferred but not critical.
Not sure if something like this has been done before. Most thing have been I would think.
There are 2 possible sources for 2 analogue inputs. I thought about using a DPDT read relay, or maybe 2 DPST reed relays. I have only been able to find DPDT ones that cost around £18. Having dual DPST sees kind of bulky, The only other option wold be opto-isolator. I have some 4N25 (I have tested these with analogue through puton the switched side and they seem fine), but 4 would be needed along with some logic to inverted one per channel making it as bulky, if not more, as dual reed relays. Its looking like I will only have one spare pin to operate the switch mechanism as well, maybe 2.
This is going to be a mobile device that may get dropped, so solid state is preferred but not critical.
Not sure if something like this has been done before. Most thing have been I would think.