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!

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.

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.

Due to COVID-19 outbreak, I have to stay at home, and your videos are god-sent to us.

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.

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

Thank you very much! This is easier to understand!

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.

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.

Thank you for making this video !

Great demonstration and explanation for newbies

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??

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.

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

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 :)

It would be nice to see your power supply setup

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

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

Very inspiring helps me understand the topic a lot better

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

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 :-)

Brilliant video clip. Mashallah. Knowledgeable

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?

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

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.

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

very helpfull for my Industrial electronics practical exam

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

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?

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

which resistor u use ?

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

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.

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

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

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.

Huge help, mate

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

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

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

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

Where can I find part 2?

Can we take input signal from Vcc and ground ?

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

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

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?

Like your work man

Thankssss u saved my life 🥺

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 can we buy IC manual..

Thanks for sharing helped.

What power supply do you 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?

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.

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 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?

hi sir .. can u help ne with an exercise

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

Sick video. Tight tight tight.

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

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

Isnt the switches connected in the wrong orientantion

Its perfect🔥

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

Adding à pull down (up) is necessary for the good behave when using switch i think

Very helpful sir👍

Awesome video sir

Nice, thanks for sharing :)

Hey how to make OR , EX-OR & NOT gate on the Bread Board? please show up that vdeos

which ic is that ?!

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

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

really appriciated thanks o lot

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

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

switches need to be pulled-down or up

You have wrong orientation regarding the set up of your tactile switch

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?

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

how do you search for the circuit diagram of any chip

You are the best

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 #

I. Am trying this thanks

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

Thank you so much

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.

Does this type of gate work on any voltage? for example 12V DC?

Long time no see Mr TTL chip.

Thank you sir

what's the best explanation why IC is in Square/rectangular shape, not circle??

Question to anyone that has built this or any of these? Its all very interesting but what is some practical uses for these circuits?