need help on making outflow valve gauge...
Hi
I am working on an RC circuit to drive a voltmeter.The concept of the circuit is that there is a three position switch in which if it is at the centre position, the voltmeter will be at 0.If the switch is pushed up,the voltmeter will increase gradually till it it at its maximum position, or if the switch is pushed back to the centre position, the needle will remain at the last position which it stops at.When the switch is pushed down, it the voltmeter will decrease till it reaches 0 or if the switch is pushed to the centre, the needle will also remain at the position it stops at.The voltmeter that i am using is a +5V.
Can anyone help me with this?probably with an explanation and a circuit diagram.
Also, is there a better way to come up with an outflow valve gauge?Any help with tis will be greatly appeciated. thks
Cheers