Digital Electronics: Logic Gates - Integrated Circuits Part 1
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- เผยแพร่เมื่อ 8 ก.ค. 2010
- This is the Integrated Circuits Experiment as part of the EE223 Introduction to Digital Electronics Module.
This is one of the circuits in the EE223 Introduction to Digital and Analogue electronics module at Dublin City University.
The associated materials are at: ee223.eeng.dcu.ie/
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Till now, no one made this type of fully explained video indeed. Great!!
Try BenEater channel.
th-cam.com/video/ROPw02W4bbE/w-d-xo.html
You explained the whole first half of my semester in digital logic in 14 minutes. Great video!
video is only 8 mins tho
@@David-wf3cc they are bots
The intro was perfect. It's good to get a thorough understanding of the chip coding and reminding of the packages. Thanks!!
This is right where we're headed in my digital systems class. I'm trying to get a head start. Thank you
Really interesting to see how logic gates are applied to electronics! Curious to see the hardware level operations of a computer.
Due to COVID-19 outbreak, I have to stay at home, and your videos are god-sent to us.
Exactly! I’m taking it online and this video was super helpful
Easily the best "basic" video on the topic. Other videos either go into too much detail and are complicated or miss the mark of making it clear, visual, and accessible. Thank you!!!
Thanks for the concepts you have discussed here.
Wow amazing i love this,kind of presentation thank you Derek Molly hoping for more video
i love watching these videos, understanding some of it and other parts not understanding it at all, keep doing the great videos, im only learning electronics and only as a hobby at home, just love building different projects just love electronics over all.
john fowler me too. Hope you are still building and learning. I am in 2020.
Thank you very much! This is easier to understand!
wished i had studied EE last time. thanks for the video - very educational.
when you use a pair of un-insulated metallic tweezers to touch the IC chips, it's very little different from touching it by bare fingers in terms of electric shocks.
Great demonstration and explanation for newbies
Part Two with the answer is here: Experiments 2.2.1: Solution to Question in Integrated Circuits
I have spent months researching into circuits and discovered a fantastic resource at Gregs Electro Blog (google it if you are interested)
hi everyone ,if anyone else wants to learn about understanding electronics components ebook try Bablim Electronics Booster (just google it ) ? Ive heard some unbelievable things about it and my colleague got great results with it.
thanks for posting this link
Extremely pleasant voice. It sounds Irish to me! Thank you for sharing!
Yeah right
Thank you for making this video !
AND gates are obviously useful.
However, i tend to buy NAND gate ICs in bulk because as you will know, you can build ANY other gate from NAND gates and when you buy them in bulk, the cost goes down.
But when you buy AND gates in bulk, the cost also goes down, which makes the benefit of buying NAND gates in bulk useless, you just spend more money because you don't know what you're doing with what you're spending money on
@@liveen But then you also may need to buy OR and NOT gates to make the circuit.
@@ivarnordlkken8082 My dude, the comment is a year old. I dont remember anything about what I was thinking here, I can't actually respond
@@liveen I read and in half a second I realized the original commeter is right, and you not.
I think the problem is that when the switches are open, the voltage on the inputs to the AND gate is undefined. You need a couple of pull-down resistors to allow the voltage to drop to 0 when the switches are open.
th-cam.com/video/ROPw02W4bbE/w-d-xo.html
Likely you had the switches incorrectly placed and it also might be an idea to place a resistor to ground on pin 1 and 2 as i'm sure logic gates don't need full source voltage to turn on and off . half should be good :)
hi! thank you for the video. i tried to give a low input to pin 2 by running a wire from vcc to a 250Kohm resistor....to the other end of the resistor i attached the wire going into pin 2 ( i was basically trying to drop the voltage and get a low input by using the high ohm resistor)...the LED still was lit even with this low input, do you know why??
Switches may not be working properly, because it seemed that when you accidently moved the switch on slot 45 of cookie board the signal got interrupted and the output change, salutes all the way from Acapulco, good vid. Should have tried grounding one of the switches to see if the output would change.
very helpfull for my Industrial electronics practical exam
It would be nice to see your power supply setup
Bro I'm electrical engineer and everything is fine in the video
Enjoying your videos they are great. Please could you advise on an oscilloscope budget £400 tops. Thanks
That ending was pretty funny, "why do you think the circuit is unstable?" as the button pins are popping out 🤣
Brilliant video clip. Mashallah. Knowledgeable
Very inspiring helps me understand the topic a lot better
I whole heartedly agree
Description
Design the following circuit by using Multisim. The circuit has 4 inputs and 3 outputs as
shown in the figure:
This system is used as a digital lock for a treasury of valuables.
To open the treasury, the user must enter a serial binary password of 6 bits. Each bit is
entered with a manual pulse at the input CLOCK. If the entered password is correct, the
output LOCK is logic 1 and the treasury is open (you may use a green light to indicate the
action). The treasury will remain open if the value at input DATA is still 1, but if the user
enters a 0 at input DATA, then the treasury will close. Don’t forget the pulse to enter the
data!
While if the entered password is wrong, then the output ALARM is logic 1 (informing the
police) and LOCK is logic 0 (the treasury is not open). You may use an orange light to
indicate the police and red light to indicate that the treasury is not open.
The user can change the password by pressing input PR, but he/she must enter the old
password, followed by the 6-bit new password (12 bits total). If the user enters the correct
old password and a 6-bit new password, the output PCh will be logic 1. The user has 2
wrong attempts to change the password, otherwise the output ALARM will become 1.
If the output ALARM is logic 1, it would n
Could you please send me a solution to the question
where is the power supply connected in the breadboard?....
Very helpful video.......thanks a bunch!
Can someone tell me the two examples of surface mounting that are shown in the video and what is it the main difference between them please?
8:38 current is floating. need resistor pull low or hight depend how you want circuit operate
which
resistor u use ?
Рассматриваешь ли работу советских микросхем ттл(транзистор транзисторной логики) логики и оу(операционных усилителей)?
Where do you find that circuit board converter at 2:15. Can't seem to find it anywhere.
The converter board reminds me of the Nazca lines in Southern Peru, the set that looks like a spider.
of course it is perfectly possible to implement the AND function without any logic gates, and with just the two switches. No pull-ups or pull-downs required either :-)
Thanks for sharing helped.
can you please help me defained the wire type you use on the matrition? (the kaind of wires a singel wire inside the coating)
hey is there a specific way to put the resistors or no ?
I have the same problem as always....
I do everything as you told me, I'm using a 47LS08 and yeah, the LED lights when I connect the supply, yet if I unplug one of the inputs... the LED keeps lit, if I unplug both, it's still on... how comes? it's supposed to be an AND, right?
Just be careful - A disconnected input is *not* the same as connecting to ground (a logic low). A floating input could be received as a logic high or logic low depending on the logic family.
Derek Molloy This is an extremely crucial point.
+pene If anyone is interested in electronics the greatest results that I have ever had was with the Gregs Electro Blog (i found it on google) without a doubt the most helpful info that I've tried.
A million thanks ti Derek!!!!!! Thank you so much..............I had been in a chaos until I read this comment
Now got it !!!!!!!!!!!!!!!! Again a billion thanks
Wow,, this si simply to understand,, thanks you Sir. 😊
Can we take input signal from Vcc and ground ?
I came to this video looking to fix the problem you encountered at the end. I can't find the second video, can someone send me the link
th-cam.com/video/KllMUO_pHxk/w-d-xo.html
Plz can u give information to how the build a all logic gates in a single chip or using single ic in a broad
Ok so I have a problem. So I made this circuit or my breadboard, connected the power and for some reason the led isn't lighting up. Can someone help me out on this and tell me the problem?
Same
Thank you so much! I remembered what I was doing wrong! I was all stuck with nothing working but now it come to me! I need pull down resistors.
But how do I calculate how big pull down resistors should I use?
my AND gate is acting weird on my bread board
I connected Vcc, input 1, and input2 to 5V; needle 7 and LED(with resistor) to negative
and the LED just keep lighting up, regardless of what input I give to the logic gate
should I connect needle 7 and LED to the ground? If so, where should I connect negative side with?
Where can I find part 2?
Huge help, mate
where can we buy IC manual..
Hello, what if I used 3 logic gates in one breadboard, should I use a pull down resistor on each of the gates?
Why doesn't it work for me ? Am I the only one ?
Hi, I have a floating remote controlled shark ( Air swimmer ) that i want to give a little AI =D. I need to make the single DC tail motor go back and forth. Avoid walls, going to use LDR`s to vary/ stop the durations of the flip flop making it turn and pitch up and down from the roof/ floor. As the shark is weight dependant could i use this or a part like it to preform those functions?
Missing pull down resistors :P The gate just floats. In digital electronics you cant leave gates/transistors unconnected to positive or negative voltage. It will not work.
Thank you very much , can you tell me what voltage and amp use to work with the 74xx ?
I think 5v
What power supply do you use?
where did you get the materials for this video and how can i get them
I think it's not working with the switches as when they aren't both pressed, the input pins to the first gate a left floating i.e. neither high nor low logic level. This can cause erratic operation.
Sick video. Tight tight tight.
Like your work man
hi sir .. can u help ne with an exercise
Awesome video sir
You indicated there would be a second part of this video, but I can't find it, although you uploaded this video some 4 years ago.
Better late than never:
th-cam.com/video/KllMUO_pHxk/w-d-xo.html
it need a pullup resistor on input or output (dunno) . It doesnt work correctly because the guts are mosfet and they have a capacitance
what important issue is this video about? I got this question in my first electrical homework but it doesn't seem like he is talking about an issue. Can anyone help?
Its perfect🔥
Adding à pull down (up) is necessary for the good behave when using switch i think
Isnt the switches connected in the wrong orientantion
really appriciated thanks o lot
So in my class , I did 2 labs like this , the only difference is after I finish my circuit I need to connect the output of my logic function to an inverter and then connect the inverter to the led so the function works just like in theory. If I don't use the inverter , ofc I get the opposite. Can anyone explain this to me. I think it maybe because the LED we are using in this lab turns on when it's on low level and not high level.
which ic is that ?!
How can I use 4011ic as dpdt switch ? Plz help me I will be very thankful to you.
You said the pins are spaced three tenths of an inch apart? The actual spacing is one tenth of an inch apart. Details like that are important.
Very helpful sir👍
Thankssss u saved my life 🥺
You should take 74LS... HCT does need a valid input voltage.
you need to use a pull down resistor on the push button so you dont get floating values
you know what IC i can use for timer and counter application??
thanks.
555 timer maybe. Check it out.
Long time no see Mr TTL chip.
how do you search for the circuit diagram of any chip
Hey how to make OR , EX-OR & NOT gate on the Bread Board? please show up that vdeos
I. Am trying this thanks
Where's the next video?
This chip have time delay?
Where is the set up done
All non conected terminals should be connected to high or low to keep it stable
well, the reason it didnt work was because when working with cmos logic, a pin should always be conected to vcc or gnd, a 1k resistor between each of the gate's input and ground would have worked great
How do i determine which logic gate is in my integrated circuit ?
Look at the number printed on the chip and look up the data sheet.
I am a computer programmer trying to learn electronics...is it fair to say that IC chips are the equivalent to functions in a computer program?
ProgramThis! yes. look up flip-flops and registers
+ProgramThis! i think a NOT gate is the same as !
ICs can have functions with them like transformations but these logic gates are more like conditions.
If you were a real programmer you would know that ANYTHING that has a defined output for a given input behaves like a function!
s8an AB my exclusive nor ic 4077 work like shit when i first test it.Doesn't like other 4000 integrated circuits,this looks like isn't working when i bring voltage and touch to gates.While my homemade xnor by transistors and diodes just work well.i like ic but this one just like shit.
How do we know that, the IC we are using is a AND type / OR type
The numbers on the IC are a "model number". They have a data sheet that will tell you every technical detail of that chip.
@DerekMolloyDCU I found it already. Sry for the stupid question :)
what's the best explanation why IC is in Square/rectangular shape, not circle??
Because it's easiest to make and use.
Nice, thanks for sharing :)
You are the best
Does this type of gate work on any voltage? for example 12V DC?
usually 5v. if you read the document about the ic number, you will know more about the voltage and limit!
thanks! Could anyone tell me how to use a xor gate in a car. So how I make a circuit from 12vDC to 5V to the xor gate and than again to 12V?
I think an voltage regulator would suffice for changing the voltage level to 5V or anything close.
For the outputs, you could connect them to an power transistor or an relay.
For 12 V you should use the 40xx series CMOS IC's. They work on up to 18 V.
I’m looking a chip that has more than 4 AND gates in it. Do they make a chip with like 8 or more? If so - what is the part #
Just use more that one. Problem solved.
Are chips like this all plug and play, I am new at this and know nothing but basic understanding like this chip got hot and started smoking so must be bad. Any help please thank you.
Did you connect the power and ground to the right pins?
Thank you so much
Daniel Saldi
(cu) control unit
(Alu) transistor