Digital Electronics: Logic Gates - Integrated Circuits Part 1 

Till now, no one made this type of fully explained video indeed. Great!!

The intro was perfect. It's good to get a thorough understanding of the chip coding and reminding of the packages. Thanks!!

You explained the whole first half of my semester in digital logic in 14 minutes. Great video!

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.

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.

Thanks for the concepts you have discussed here.

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.

Wow amazing i love this,kind of presentation thank you Derek Molly hoping for more video

wished i had studied EE last time. thanks for the video - very educational.

Thank you very much! This is easier to understand!

Great demonstration and explanation for newbies

Part Two with the answer is here: Experiments 2.2.1: Solution to Question in Integrated Circuits

That ending was pretty funny, "why do you think the circuit is unstable?" as the button pins are popping out 🤣

Thank you for making this video !

Extremely pleasant voice. It sounds Irish to me! Thank you for sharing!

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.

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 :)

Very inspiring helps me understand the topic a lot better

Brilliant video clip. Mashallah. Knowledgeable

Why doesn't it work for me ? Am I the only one ?

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.

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

Huge help, mate

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.

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

It would be nice to see your power supply setup

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??

Wow,, this si simply to understand,, thanks you Sir. 😊

Where do you find that circuit board converter at 2:15. Can't seem to find it anywhere.

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?

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 :-)

Like your work man

8:38 current is floating. need resistor pull low or hight depend how you want circuit operate

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?

The converter board reminds me of the Nazca lines in Southern Peru, the set that looks like a spider.

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.

which resistor u use ?

Рассматриваешь ли работу советских микросхем ттл(транзистор транзисторной логики) логики и оу(операционных усилителей)?

Awesome video sir

Sick video. Tight tight tight.

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.

Thankssss u saved my life 🥺

hey is there a specific way to put the resistors or no ?

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?

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

Thanks for sharing helped.

Very helpful sir👍

can you please help me defained the wire type you use on the matrition? (the kaind of wires a singel wire inside the coating)

Enjoying your videos they are great. Please could you advise on an oscilloscope budget £400 tops. Thanks

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.

Nice, thanks for sharing :)

Where can I find part 2?

where is the power supply connected in the breadboard?.... Very helpful video.......thanks a bunch!

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?

where did you get the materials for this video and how can i get them

Thank you very much , can you tell me what voltage and amp use to work with the 74xx ?

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?

I. Am trying this thanks

Hello, what if I used 3 logic gates in one breadboard, should I use a pull down resistor on each of the gates?

Its perfect🔥

Can we take input signal from Vcc and ground ?

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?

Plz can u give information to how the build a all logic gates in a single chip or using single ic in a broad

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.

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?

where can we buy IC manual..

What power supply do you use?

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.

you know what IC i can use for timer and counter application?? thanks.

hi sir .. can u help ne with an exercise

Long time no see Mr TTL chip.

You are the best

How do i determine which logic gate is in my integrated circuit ?

you need to use a pull down resistor on the push button so you dont get floating values

it need a pullup resistor on input or output (dunno) . It doesnt work correctly because the guts are mosfet and they have a capacitance

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 #

which ic is that ?!

Thank you sir

You should take 74LS... HCT does need a valid input voltage.

Thank you so much

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

Nice Video

In this video we learn that buttons are hard to use.

Isnt the switches connected in the wrong orientantion

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.

how do you search for the circuit diagram of any chip

How do we know that, the IC we are using is a AND type / OR type

All non conected terminals should be connected to high or low to keep it stable

Understandable

How can I use 4011ic as dpdt switch ? Plz help me I will be very thankful to you.

8:11 "DADDY?!" crank up volume to hear

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.

thanks!

So nice

Where is the set up done

@DerekMolloyDCU I found it already. Sry for the stupid question :)