• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

disable 2 wires while the other one is conducted

Not open for further replies.
ai have 3 wires. if either one wires is conducted (after received signal, +9V), the other two will be left opened.

initially i was thinking to use relay. however, by using this method, i will have to use 6 relays for the circuit.

In my circuit , i have 6 places which need to have this function, then i have to buy 6 x 6 = 36 relays!!!!!

do u guys have better way of doing this?


Active Member
If current through your circuit is not very high, you can use CMOS switch ICs like ADG411 or CD4066.


Active Member
Hi Janet,

The 9 volt you mention makes me think this is a
unit run from a battery.
You say if one wire recieves a signal,
the other two should become open circuit,
i hope i have that right.

So its a kind of race?
Whichever goes first,
would cut off the other two ?

You say you were thinking of a relay,
but you reckoned six relays for that?

No, i think one for each wire would do.

I have drawn out a set of three relays,
i hope it meets your needs.
Any wire operating, will cut off the other two.

Ive drawn the contacts above the coils for each,
i think it makes it easier to follow like that.

If its a battery unit, maybe you should consider
using chips instead, because of the current
needed for relay coils.

Best of luck with it,


Not open for further replies.

Latest threads

EE World Online Articles