How to use a nc switch to activate a buzzer when pressed

hi there

i don't know if this is possible but, i want to be able to :

have a buzzer come on when a nc switch is pressed, for example, i have an emergency stop switch which is nc, so when pressed the circuit is broken,

i would like it so when i press the switch ( ie it breaks the contact ), it makes a buzzer sound and an led come on to notify that the emergency stop has been pressed,

i am using 8 core Ethernet cable to connect the emergency stop switches so if i have a circuit in every switch , i can do the same in every stop switch with the cable i am using,

i want a buzzer and an led in EVERY emergency stop switch, i will have 3 in total,

is it just the case of wiring the circuit in the one emergency stop and connecting the leds and buzzers from the others in Parallel at the other stop switches ?, or do they have to be wiring in series ?

i have got 6v and 12v buzzers and many value of resistors so the source voltage for powering them really wont be a problem,

the biggest problem is building the circuit, because atm it is a nc switch so if i connected an led and buzzer, it would be connected all the while, i need to somehow use the nc switch to break a circuit but also use it as a no switch for the buzzer circuit,

if this is possible please leave a comment and help if you can,

i have looked on google but cant really find anything,

thanks

EDIT !!!!

hi also ad an addon to the question, the nc switch will be switching 230v, so the live cable will be cut and put accros the nc contacts, will this still work with iceng circuit or is that a big nono ?

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iceng4 years ago
You know those red E-Switches can change the NC_screw_on to a
NO_screw_on or both at the same time.

But if the NC is all you have, here is a circuit. . . . . . . .  A
Mosfet_n-ch_NC_circuit.PNG
shanecoley (author) 4 years ago
hi also ad an addon to the question, the nc switch will be switching 230v, so the live cable will be cut and put accros the nc contacts, will this still work with iceng circuit or is that a big nono ?
230V is too big ( much ) for the circuit
Nope You need the 12 volt PSU - See relay OR my mechanical solution which will be Ok
BIG no-no. See relay below.
rickharris4 years ago
Mechanical solution. The lever keeps the NC switch open until it is pressed down at one end. This lifts the other end off the switch and activated the buzzer.
NC switch.jpg
Simplest way is to just use a relay: the coil is permanently ON, wired through your switch, the output is wired to the normally closed contacts of the relay. When you press the button, the coil is turned OFF and the contacts close.