[geditor]

Hi,
There was no thread for this exam so I though I'd make one So how is revision going?

Could any of you explain to me when making a frequency divider, you have to arrange the d-type flip flops in the "up" counting arrangement rather than "down" counting arrangement? Thanks

[tashaabc123]

the elec 1 exam was so hard , it was harder than the revious past past papers
hope the grade boundaries will be low for this paper.

[geditor]

Yeah, I know tell me about it. The last question was slightly annoying... It said use the minimum number of gates but didn't tell you how many to actually use. I managed to use only 5, but my friends used only 3 because they used a 3 input NOR gate at the end which I was not aware you could do... It will be interesting to see how they mark it.... :/

[erthyop]

It was pretty good on the most part. I think the people who make the exams are a little bit crude with the questions. For the last question I did not know whether they wanted me to use a 3-input OR gate or string two, two input OR gates together to get the three input. Really they should make the questions a little bit clearer in my opinion. Also does anyone know if a 3-input OR gate was acceptable in the last question? because I drew it but my friends were telling me I should have used two.

[geditor]

(Original post by erthyop)
It was pretty good on the most part. I think the people who make the exams are a little bit crude with the questions. For the last question I did not know whether they wanted me to use a 3-input OR gate or string two, two input OR gates together to get the three input. Really they should make the questions a little bit clearer in my opinion. Also does anyone know if a 3-input OR gate was acceptable in the last question? because I drew it but my friends were telling me I should have used two.

I don't know. I used 2-input NOR gates strung together but my friends are telling me that 3-input NOR gates were what they wanted.

[erthyop]

(Original post by geditor)
I don't know. I used 2-input NOR gates strung together but my friends are telling me that 3-input NOR gates were what they wanted.

hmm I think the examiners will be lenient in the marking of this question both answers in my opinion are correct, lets just hope they don't penalize people for using the wrong combination.

[tashaabc123]

how did everyone do on question 3 and wat was logic 1

[tashaabc123]

any 1 have any ideas about wat questions will come on elec2 ?

[geditor]

Ummm... not sure tbh... All the exams I've been taking recently have been quite unpredictable :/

I said logic 1 was when the switch was being pressed.

Also, what did everyone put for the solenoid symbol... I didn't have a clue what it was so I just drew a box with a line through it.

[geditor]

Do you know how strict the examiners are on significant figures?

[tashaabc123]

(Original post by geditor)
Ummm... not sure tbh... All the exams I've been taking recently have been quite unpredictable :/

I said logic 1 was when the switch was being pressed.

Also, what did everyone put for the solenoid symbol... I didn't have a clue what it was so I just drew a box with a line through it.

yes you drew the correct symbol for solenoid. for logic 1 i put its when voltage is above a certain level is that wrong

[iCiaran]

(Original post by geditor)
Yeah, I know tell me about it. The last question was slightly annoying... It said use the minimum number of gates but didn't tell you how many to actually use. I managed to use only 5, but my friends used only 3 because they used a 3 input NOR gate at the end which I was not aware you could do... It will be interesting to see how they mark it.... :/

(Original post by erthyop)
It was pretty good on the most part. I think the people who make the exams are a little bit crude with the questions. For the last question I did not know whether they wanted me to use a 3-input OR gate or string two, two input OR gates together to get the three input. Really they should make the questions a little bit clearer in my opinion. Also does anyone know if a 3-input OR gate was acceptable in the last question? because I drew it but my friends were telling me I should have used two.

(Original post by geditor)
I don't know. I used 2-input NOR gates strung together but my friends are telling me that 3-input NOR gates were what they wanted.

I'm fairly sure both answers are acceptable, I used 5 2 Input NORs .

(Original post by tashaabc123)
how did everyone do on question 3 and wat was logic 1

I wrote when the output is high (9V) , but I think anything that mentions high/ 9Vs or similar will be fine.

(Original post by tashaabc123)
any 1 have any ideas about wat questions will come on elec2 ?

Op Amps, more Op Amps and more Op Amps, probably with a shift register or binary counter made from D flips flops involved thrown in somewhere, and an advanced logic question.

To be honest Electronics exams are pretty predictable, look at ELEC1 from the last few years, and every one starts with a basic logic question, has the whole circuit block diagram question etc. Was disappointed there wasn't a zener diode question this year though

(Original post by geditor)
Do you know how strict the examiners are on significant figures?

As long as it's reasonable you should be ok, anything past 3 is pushing it a bit but I don't think it matters.


I did forget the solenoid symbol though, just drew a box with "solenoid" written in it xD

[geditor]

Thanks. I thought writing down "high" or 9V would be just too obvious.... :/ Yet again, I fail to see what the question is actually asking for :/ I wrote down something like, the switch has been pressed :/

[geditor]

Can someone explain this question to me please?


I believe it's from June 06 ELE2, Question 6.

[geditor]

Can someone explain this question to me please? ( part ii)


I believe it's from June 06 ELE2, Question 6.

[iCiaran]

(Original post by geditor)
Can someone explain this question to me please? ( part ii)


I believe it's from June 06 ELE2, Question 6.

I think this is some kind of filter, and filters have now been moved to the A2 spec, but if you treat it as a normal inverting amplifier you should be able to answer parts i) and iii)

[geditor]

(Original post by iCiaran)
I think this is some kind of filter, and filters have now been moved to the A2 spec, but if you treat it as a normal inverting amplifier you should be able to answer parts i) and iii)

okay, thank you. I've done all the past papers going back to 2002 now I think; do you know any other good revision places/techniques that?

[geditor]

Anyone got the June 2011 ELEC2 examiner report?

[geditor]

Can anyone explain the last part of this to me please? Part c ii

[geditor]

That ELEC2 paper was much harder