Question

Using a logic equation, simplified via a Karnough Map, design a logic circuit to solve the following problem:

A car engine safety system is to prevent the engine from being started unless the driver door is closed, the seat belt properly fastened and the motor-fault alarm is not set and the Mechanic’s Override switch is not set. A mechanic has an over-ride switch that if set enables them to start the engine no matter what the state of the door, or the seat belt, but the motor-fault alarm must not be set.

Answer 1

What I need is guidance in putting words in the logic equation, the rest is easy to do.

So far what I get is:
If switch on starts engine no matter state of the door (open or close), or sea belt (put it on or not), but (not alarm set)

A = door (open or close)
B seat belt ( on/ off)
C = alarm (set or not)

It is the equation correct?

A v B & (~C) ??

Answer 2

putting from words into equation***

Answer 3

First thing you should do with a question like this is identifying the variables. You've already found three of them, but there is one more. Then, you'll need to define each variable clearly (e.g. 'if A is true, the door is open, otherwise the door is closed').

Since you're asked to solve this problem using a K-map, you can either fill in the K-map directly or create a truth-table using your variables and the description. You can then use that truth-table to fill in a K-map.