Electrical Component with the Letter M?

[Simon981]

1. Homework Statement

This is the sample answer to the circuit they ask to draw. I get the comparators, the inverter and the Gate. That’s all clear.

Then they wanted a switch that needs to be used to end the sound alarm, regardless of comparator output. I assume this the box labelled M. What component could that be? Surely it’s not a motor. Google and Databooklet didn’t help, so I would appreciate any advice as to what component that Box prior to the speaker could be.

Homework Equations

The Attempt at a Solution

 

[.Scott]

It's a Set/Reset flip flop.
I don't know where the "M" comes from. "Multivibrator" perhaps??

 

[berkeman]

It's a Set/Reset flip flop.
I don't know where the "M" comes from. "Multivibrator" perhaps??

Sounds right to me.