Digital Electronics: Logic Gates - Integrated Circuits Part 1
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- čas přidán 5. 09. 2024
- 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/
Till now, no one made this type of fully explained video indeed. Great!!
Try BenEater channel.
czcams.com/video/ROPw02W4bbE/video.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
Why doesn't it work for me ? Am I the only one ?
He didn't finish it
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!!!
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
The intro was perfect. It's good to get a thorough understanding of the chip coding and reminding of the packages. Thanks!!
Really interesting to see how logic gates are applied to electronics! Curious to see the hardware level operations of a computer.
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.
czcams.com/video/ROPw02W4bbE/video.html
This is right where we're headed in my digital systems class. I'm trying to get a head start. Thank you
That ending was pretty funny, "why do you think the circuit is unstable?" as the button pins are popping out 🤣
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.
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.
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.
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
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 :)
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
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.
It would be nice to see your power supply setup
Bro I'm electrical engineer and everything is fine in the video
Thank you bro. Now I get it, you totally save my life.
wished i had studied EE last time. thanks for the video - very educational.
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.
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
czcams.com/video/KllMUO_pHxk/video.html
Extremely pleasant voice. It sounds Irish to me! Thank you for sharing!
Yeah right
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 :-)
8:38 current is floating. need resistor pull low or hight depend how you want circuit operate
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
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.
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.
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
Adding à pull down (up) is necessary for the good behave when using switch i think
Thanks for the concepts you have discussed here.
where is the power supply connected in the breadboard?....
Very helpful video.......thanks a bunch!
You should take 74LS... HCT does need a valid input voltage.
Very inspiring helps me understand the topic a lot better
I whole heartedly agree
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.
Brilliant video clip. Mashallah. Knowledgeable
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.
Wow amazing i love this,kind of presentation thank you Derek Molly hoping for more video
Enjoying your videos they are great. Please could you advise on an oscilloscope budget £400 tops. Thanks
You have wrong orientation regarding the set up of your tactile switch
Very helpful sir👍
Hello, what if I used 3 logic gates in one breadboard, should I use a pull down resistor on each of the gates?
you need to use a pull down resistor on the push button so you dont get floating values
Thankssss u saved my life 🥺
The converter board reminds me of the Nazca lines in Southern Peru, the set that looks like a spider.
Great demonstration and explanation for newbies
I feel like this video was cut off early. Where is part 2?
Wow,, this si simply to understand,, thanks you Sir. 😊
Huge help, mate
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?
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??
Thank you very much! This is easier to understand!
Plz can u give information to how the build a all logic gates in a single chip or using single ic in a broad
Quick question for anyone: Did he HAVE to connect to ground with a resistor? Was it just for the purpose of connecting to ground and could have used a small wire?
I think led will blow due to high voltage ,if we don't use resistor.
Also can u tell me what was last questions answer plz ??
Thank you for making this video !
Hi friend request resistor of 10 k in inputs of the gate to mark a zero logic. As pull down resistor..
Complete NOOB here. What do the F PH24AB stand for? Are only the bottom alpha-numericals important?
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?
Led is not responding! ...what is lacking? ...from the philippines
Set voltage 5 volt . Check first if the led is working . If it is working . There can either be breadboard line issue or the output is zero for the circuit
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.
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?
which ic is that ?!
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:
czcams.com/video/KllMUO_pHxk/video.html
what's the best explanation why IC is in Square/rectangular shape, not circle??
Because it's easiest to make and use.
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
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?
I. Am trying this thanks
Circuit worked fine with the cable jumpers. BUT... the problem starts when he tries to set the two switches, he didn't make sure to set them in right position. That's all the problem here.
Cheers
can you please help me defained the wire type you use on the matrition? (the kaind of wires a singel wire inside the coating)
All non conected terminals should be connected to high or low to keep it stable
Leads may be pushed too far into the breadboard
How can I use 4011ic as dpdt switch ? Plz help me I will be very thankful to you.
which
resistor u use ?
Where do you find that circuit board converter at 2:15. Can't seem to find it anywhere.
Can we take input signal from Vcc and ground ?
Isnt the switches connected in the wrong orientantion
hey is there a specific way to put the resistors or no ?
Hey how to make OR , EX-OR & NOT gate on the Bread Board? please show up that vdeos
very helpfull for my Industrial electronics practical exam
Hi i need some help connecting this. The circuit uses a multiplexer, adder and comparator to perform the binary to BCD
conversion. If a number is greater than 9 it will be an invalid BCD code. We therefore
compare each 4 bit number from the switch using a comparator to determine if it is greater
than 9. At the same time we add 6 to any value from the switch using an adder. If a number
is greater than 9 the output of the comparator will select the binary value on the switch that
has been added to 6. If it is not greater than 9 the binary value on the switch is directly sent
to the seven segment decoders. This is achieved using a multiplexer.
Рассматриваешь ли работу советских микросхем ттл(транзистор транзисторной логики) логики и оу(операционных усилителей)?
how do you search for the circuit diagram of any chip
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?
where did you get the materials for this video and how can i get them
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.
I have a 7404 Not gate. I was playing with it and I connected it to a 9 volt battery. Did I kill it?
twistedyogert check its datasheet for power rating
It¨'s designed for 5 V. Just check if it's still working.
Why is there a resistor to led
To prevent them from being destroyed.
This chip have time delay?
Question to anyone that has built this or any of these? Its all very interesting but what is some practical uses for these circuits?
Anything that requires logic.
For example, the CPU in your computer.
Basically, you can do logical/Boolean situations and equations using actual hardware, like saying, if this and this or this, then this output should happen, like if this wire is connected to this pin on the IC Chip, or this other wire, this LED light should light up, if not, the LED light should not light up, but then you get into the true's and false's or 1's and 0's of binary and assembly language, so, like I2udolph said, your computer is basically doing these kind of equations but much more complex and many more of them to process programs and what's on the screen, I'm still a student so I don't know everything but I hope this helped you! :)
Remote control, Tickle Me Elmo, Digital Clock, Flash Light, Flesh Light, Laser Pointer, what you're using to watch this video, your A/C unit, the light in your room, your phone, pacemakers, zombie robots, etc
I cracked up at "tickle me elmo" lol :)
E Park I cracked up at "Flesh Light"
Why i cant open your website?
Where is the set up done
Thank you very much , can you tell me what voltage and amp use to work with the 74xx ?
I think 5v
you know what IC i can use for timer and counter application??
thanks.
555 timer maybe. Check it out.
Where can i buy it?
Like your work man
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.
Link doesnt work 😢
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?
hi sir .. can u help ne with an exercise