AQA Elec4 29th May 2012 Exam Thread
Discussion, revision, exam and homework help from KS3 to degree level including engineering, construction, design and technology, agriculture, PE and sports science.
| Announcements | Posted on | |
|---|---|---|
| Important: please read these guidelines before posting about exams on The Student Room | 28-04-2013 | |
-
Re: AQA Elec4 29th May 2012 Exam Thread
Not sure about the XOR gate. While this is what I constructed, didn't the question state that if Control is 0, the display should not illuminate? Although then it would just be C.NOT(B) , which didn't use the required amount of gates or the supplied OR gate.
Also managed to mess up the second part of this question, constructing my OR gate wrong (I put an additional NAND gate on the end as a NOT. Too long since ELEC1). It certainly looked nothing like this (see image); not sure if we were meant to simplify it. Probably, although I didn't.
And yeah, flow chart question... What the... Not really sure what it was asking. I calculated positive difference and used an undefined subroutine to "adjust focus". Probably wrong :/.
Rest of the paper went okay, as far as I can remember (which isn't much to be honest).