x Turn on thread page Beta
 You are Here: Home >< Maths

# Basic logic gates & Boolean expression help? watch

1. I am trying to figure out where i have made a mistake with my boolean expression's, i have created a mock up below:

Anyone Help?

2. (Original post by cameronpwj)
...
I'm not familiar with the bar over the Q convention. Is that rather than just have it over the whole expression on the right of the "="?

Both your "or" gates look wrong to me. The top one should be I believe, with your notation.
3. (Original post by cameronpwj)
I am trying to figure out where i have made a mistake with my boolean expression's, i have created a mock up below:

Anyone Help?

For A, B input with OR gate Q=A+B
but with NOR gate
similar for NAND gate and NOT gate
But I think the final A+B.C right

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: April 4, 2013
Today on TSR

### Complete university guide 2019 rankings

Find out the top ten here

Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams