# Upto how much voltage can be multiplexed by 4051B 8X1 IC?

I want to control a 9 volt pump with my arduino, and my arduino is giving around 2V as output through its gio pins ( I don't know exactly the reason why, maybe cause I have lots of other sensors attached to it), my pump is not working.

For it, I thought of multiplexing the 9 volt battery, if the input to IC is 01 on select channels, then 9 volt should be the output of the multiplexer, else it should be zero.

But I am not sure if this is possible or if the multiplexer can direct 9 volts of power supply to the pump.

And also, please suggest if there is a better way to control my pump (there is no power supply attached to the pump, so I can't use relay).

• I don't know exactly the reason why ... you should review the Arduino specifications .... there is no reason why you should not know what the output voltages are – jsotola Sep 19 '18 at 5:19