Cleaner way to swicth sensors

[Dmed]

working on a project that uses 4 proximity magnetic sensors. 2 max positions and 2 home positions(horizontal and vertical). these sensors are connected to a PIC.
problem is I only have 2 inputs left on the pic. I was using a relay to switching them, but sometimes getting some false readings. I think is because of the relay's contacts bouncing.

other better way to switch?

Thanks in advance.

 

[Dr_Doggy]

what is output value on sensors?

you could extend those pins using a shift register(parallel to serial)......

 

[DemonicSandwich]

If the contact bounce is truly the cause of false reading. Then just switch the relay, add a delay (maybe 1ms), then read the sensor.

 

[Dmed]

high & low or 1 & 0

 

[MikeMl]

Does the PIC have an ADC? If so, wire the switches to some binary-weighted resistors to create sixteen different analog voltages which you can read through one PIN...

 

[ADWSystems]

If the outputs of the proximity switches are logic level, then drop in some logic and build a 2-of-4 multiplexer controlled by the same pins the relay and proximity switch use currently. I know they make a small one, like 1 of 3 or something. I'll look.

 

[ADWSystems]

Found them. 74153 is a dual 4 input 1 output multiplexer and the 74157 is a quad 2 input 1 output multiplexer. From the description I would suggest the '157.