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This contest will run for one week (Nov 1 - Nov 6, 2008) . Ending time is based on central standard time. To enter, identify the item pictured above and give an example of what can be done with it. Please do not give the answer in the comments. Send an email to contest @ hackedgadgets.com with "Name the Thing Contest" as the subject, and the message body consisting of:
The winner will be chosen at random from all of the correct entries.
———————————–———- Added November 12, 2008 The item to guess was a Quad 2-input OR gate The winner is Jeremy A. Thanks to all who entered (there were 154 entries) ————————————–———- Below is a picture of the prize.
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November 1st, 2008
Too easy
November 1st, 2008
I have to agree. Maybe a better question would be identify the manufacturer which used this diagram in there datasheet?
November 1st, 2008
@ Fred
No Manufacturer…
but Wikipedia
November 1st, 2008
I imagine the contest box will be overfilled this time. Nice one.
November 1st, 2008
Hi Fred,
I agree that would have made it much harder but I want to mix things up a bit and not keep it only for the very knowledgeable. Don’t worry there will be MUCH harder ones in the near future!
November 1st, 2008
It wouldn’t surprise me if a lot of younger people didn’t know what it was.
(I know, of course, that it is a Centipede with four babies on it’s back.)
November 1st, 2008
what kind of electronic geek wouldn’t know this?
November 1st, 2008
@Hant: Plenty of people won’t know. Beginners, software programmers, people who don’t get into the whole design stage (just show me where to solder types), etc.
November 1st, 2008
Well, you either know this one or you dont….
November 1st, 2008
Well I don’t know this one… OR maybe i do?
heheheeee
November 2nd, 2008
hahaha I know
talk to me: “electronic geek”
November 3rd, 2008
…way too easy this time.
November 3rd, 2008
Hah. If I win the prize, I’m going to hack it to test more than just network cables
November 4th, 2008
I member these particularly when I always seemed to get one soldered in only to have to replace it cause my iron was so hot it fried it
November 8th, 2008
What else would a cable tester be able to be hacked to do?
November 9th, 2008
Why, repair them, of course!!
November 9th, 2008
so um when is the winner sposed to be decided
November 9th, 2008
The winner will be announced in a day or two.
November 12th, 2008
It’s a quad comparator no?
November 12th, 2008
Any winner yet?
November 12th, 2008
Winner announced!
November 12th, 2008
How can an OR gate have fewer than two inputs? They can have more.
Perhaps you should have narrowed the question to “is it TTL or CMOS”?
November 12th, 2008
Hi Fran,
Thanks for the comment, these all have two inputs. A and B are the inputs and Q is the output.
November 13th, 2008
It’s not always clear how specific the answer needs to be. I knew right away it was a quad 2 input OR gate (at first I thought it was a 7432 but then noticed the pinout didn’t match) and after some searches I could tell it was CMOS, but I thought maybe you were looking for the specific chip number and the only ones I found had a different pinout. BTW, what is the number of the chip shown?
November 13th, 2008
Hi Steve,
Thanks for participating and thanks for the feedback. The article that the chip image came from is linked above the winners name (not a very technical site, but was the first site that had the image I was looking for).
I wasn’t looking for anything very detailed such as the chip number, the one in the picture is the 4071 but I honestly would have thought that the pinouts would have been the same as the standard 7432 that I used to use back in the day… Sorry for the confusion, I wouldn’t have guessed that the picture of the gates would have been specific enough to be TTL or CMOS.
If in doubt of the level of detail you can always ask in the comments, I will be happy to clarify. Good luck with future entries!
November 14th, 2008
>How can an OR gate have fewer than two inputs?
An OR gate with one input is called a Buffer.
November 15th, 2008
>>How can an OR gate have fewer than two inputs?
>An OR gate with one input is called a Buffer.
I = Input
O = Output
Truth Table for a one input OR gate
I | O |
__+___+__________________________________
0 | 0 | All Inputs Low, Output is Low.
1 | 1 | Any Input High, Output is High.
Truth Table for a one input AND gate
I | O |
__+___+__________________________________
0 | 0 | Any Input Low, Output is Low.
1 | 1 | All Inputs High, Output is High.
One could argue that a Buffer is an OR gate with one input because… the output is high if any of it’s inputs are high; the is output low only if all it’s inputs are low.
BUT, one could also argue that a Buffer is an AND gate with one input because… the output is high only if all it’s inputs are high, the output is low if any of it’s input are low.
We have two conflicting arguments. Both are valid by the truth table; so, which one is correct? Comments…