So sorry for the delay since the last video was released, finally I have one for you. This is a long video, even for me, so if you want to skip to a specific section you can use the Table of Contents in the description. I actually have this is ALL my videos, not sure if everyone realizes that as some viewers never read the descriptions! I promise that I won't make you wait as long for the next video. Hope everyone is well and staying safe!
Bill, you're a great teacher, video editor, communicator and technical knowledge source and you keep getting better. You're an international treasure. Thank you.
so, let me check if I'm getting this right: A person (Bill, in this case) takes his precious time, knowledge, and effort to put up a massive video teaching some digital electronics, and shares it with the world, to whomever wants to learn. For FREE. And people complains about some freaking ads? I mean... to totally disrespect a quality content creator's work, just because of some ads that could provide some revenue to keep going on? I'm trying my best to be polite, here. Seriously. This total lack of empathy is just... appalling. THANK YOU, Bill and DroneBot Workshop. You ARE appreciated. Your work IS appreciated.
Bill, you're a great teacher, video editor, communicator and technical knowledge source and you keep getting better. You're an international treasure. Thank you.
This is an absolutely well thoughtout demo video for making the seemingly incomprehensible logic circuits easily understandable. Like all videos made by Bill, I am saving this one too for reference when needed. Thank you Bill for your hard work and making such educational videos freely available on youtube..
I wish you were around in '79 when I was going thru my 'A' school for electronics. Far better explained than what the Navy gave us and expected us to learn. Thought this might be a fun refresher, but is much more. Thank you. Regarding your concern for the wait, it's well worth the wait. Well done.
Anyone unfamiliar with the subject may not understand just how wide your search would have to be to gather all this information individually. There's nothing necessarily revolutionary about the info itself, but packaging it all together here and pre-chewing it for viewers new to electronics definitely earns a thumbs-up.
YES, BUT At 21:00 the narrator says that DTL uses more current than TTL. That wasn't true of standard TTL, but it is true of low-power TTL which is now used. It's also true that every time a TTL gate changes state it produces a near short-circuit for a nanosecond or two, which requires power supply lines to TTL to have HF decoupling capacitors distributed all around the circuit card.
This takes me back to 1962 and my first Navy school where I learned Basic Transistor Theory. We have come a long way in 58 years! Has it really been that long? Wow!
Great video, Bill. I think knowing about all these logical gates is a 'must' for everyone dealing with electronics since they are the core of all our favourite microcontrolers. Thank you for this Educational video!
This channel is more than a diy arduino channel which is a common thing. This channel actually teach me something and not just following an instruction.
basic logic IC chips is better understood when building bicore robots or other iterations of these robots using logic chips. These simple (minded) robots give a better understanding of their functions and how they function. Though this hobby is over a decade old, I still love to build these simple little robots both for fun and education. Search: Bicore, BEAM bots, and based on the 74ACT/HCT10 chips or the 74HC/AC240 chips. Again, as simple as they are, they're still lots of fun to make and observe.
@@Enigma758 These are pics of one of my Beam bots with 2DOF, I'm putting a small video together of the other robots. forum.allaboutcircuits.com/attachments/100_0986-jpg.16664/?cb=1600781201 forum.allaboutcircuits.com/attachments/100_1013-jpg.16665/ forum.allaboutcircuits.com/attachments/100_1019-jpg.16666/
"Take all your MOSFET in your device aiming to youtube and watching this video..... ".... What a hilarious input device.... Hahaha ha...... (From South Africa)
Loved this video but thought you moved on to the esp32 with micropython. Micropython is so much easier to code and the esp32 is much cheaper than an arduino.
A week or so ago, I was sourcing parts for a project I'm working on and I discovered that a single ATTiny would be cheaper than the approach I was going to use with NAND gates. 😂
But if you were to put it into production as a manufactured item, how much time (time=money) would the added step of flashing of the program on each of them add to your finished cost? For most one-off and hobby projects, microcontrollers make sense. But the logic chips often make more sense for high volume production.
Wow! Right when I looked for this it was uploaded a week before. I'm tire of people showing stuff with an Arduino, I was trying to do it without an Arduino so thank you!
Excellent video. I'll be interested how you dell with the 74LS that is running at 5V and on a computer board that is running 3.1V. Would you need something to deal with the voltage change or is the high volt of 3.1 still trigger a logic of One on the 74LS?
That gave me some interesting memories; oh I am Computer Science grad, not Computer Engineering so I only had one class of gating and the practicals were MC programming on something already wired. Although there is a more elementary gating, OR is !(!A*!B) for lack of terms, AND and NOT are atomic, but OR is not.
Bill, you’ve got me stumped on the last two circuit designs. You’re showing 220 ohm resistors for the LEDs in your circuit drawing but I don’t see them on the actual circuit board. Am I missing something?
I work in a company doing PVD (Physical vapor depositions) coatings. The machines generate a glow plasma to sputter the target material on a substrate. The glow plasma is very susceptible to decaying into an arc, which is not desirable, however when arcing does occur, the arc event has to be recognised and extinguished within 500 nanoseconds. We use logic gates and 555 timers with cumulative gate propagation delays within 200-300 ns to detect and handle this. Any solution with a microprocessor would be impossible with interrupt execution latency of about 4 - 10 microseconds, 8 to 20 times the response time of the design requirement. This is one very good reason why discrete logic gates are still relevant.
I want to draw logic circuits. I draw with pen and go through reams of paper and I can't fit my ideas on paper. I can't afford a program even if I knew where to get on. I barely know how to watch UA-cam on a Chromebook and I am 67 years old and on Social Security Disability as m Mentally Disabled, The reason I can't afford anything. I don't trust where I would not have control of my system ala Windows 10 and the like. I want to know down to the logic gate and work from there.
Could I use logic chips to setup and drive a single16 segment display. I want to use it for an automatic transmission shifter position indicator for the letters P, R, N, D, 3, 2, 1. What would you recommend if this is feasible?
Let me preface this by saying I greatly appreciate both your content and presentation, and I am currently both high and drunk. With that out of the way, trying to sound as not dickish as possible (because I know this really has the potential to come off that way in a written comment), I applaud your courage in producing a long-form video for public consumption on the internet in which you speak the entire time given your particular…manner of speaking, I guess I’ll say? Although given the subject matter, I suppose anyone watching would be highly unlikely to say anything demeaning, so I suppose that by even bringing it up, I’m the odd one out. Don’t do drugs, kids. See the stupid stuff it makes you think?
as usual great content and well thought out ex[;aination. However, the ads are driving me crazy. getting one or a series every 4 or 5 minutes. Almost makes the whole thing unwatchable. You Tube is getting greedy to the detriment of both viewers and content makers. I really feel very stongly about being forced to break concentration to skip an ad. Sorry but may have to find another channel without ads.
there's definitely circuits to use these 74 series that aren't logic, for example mark tildens beam bot, which used one to flip flop a signal to make servos go back and forth. edit: well actually it used two one for each servo, but still, good stuff especially since they can be had for less than a dollar a piece and there's probably millions of them sitting around on shelves everywhere
referring to nand gates around 7:28, you said that the output was set to 1 "except" when A & B are "equal". Did you mean to say when A & B are both 1? According to the truth table when 0 = 0 the output is still 1
The Mosfets in my device are always extremely exited, when they realize they shall play one of the Workshop Videos. They are then so motivated - I think they would do it even without electricity. 😃
Great tutorial. I have always been inspired by the work you put into your tutorials. The graphics and visual aids are fantastic and as previously mentioned you're easy to follow because you don't rush the information however I was greatly disappointed in being interrupted by commercials.
at 26:26 the schematic seems to show a pull-down resistor but the explanation says "requires pull-up resistor". It would seem to require a pull-down resistor as shown in the schematic.
At 20:35 you state that you can not make an inverter gate using RTL. That is incorrect. The most basic RTL gate is the inverter. 1 transistor and 2 resistors. The reason for RTL to be replaced was there poor fan out ability.
Digital logic is a lot of fun I used to build quite a few different types of circuits 36 years ago I now prefer to use arduino. I once designed a circuit that had a sensor and it connected to a door lock you would carry around this little teeny black package with another eye on it and when you brought the two eyes in front of each other it would unlock the door. I still have the little black package right now but I don't have the schematic how I wired it up and I forgot I may have to reverse-engineer my own stuff but 25 years after I made this little infrared lock I seen something that people were selling that you could buy and put on your door same thing. And I never told anyone what I had created way back then in 84 so who ever discovered that did that on their own
sorry I'm totally new to electronics, started off it as a hobby I have a software background. but in the circuit around 31:00 why he is using a capacitor? and is he using a round red resistance near the supply? if yes why is that so?
Those are "decoupling" or "bypass" capacitors (the terms tend to be used interchangeably when the caps are across the power supply rails). All electrical conductors have inductance and resistance. Usually the resistance isn't a problem with small logic circuits, but inductance can be. The most important property of an inductor in this situation is that it opposes rapid changes in current (you cannot instantaneously change the current through an inductor). When logic device outputs switch, they tend to draw a spike of current that lasts nanoseconds (depending on logic family) but can be tens of milliamps. If there is inductance in the power supply lines, these spikes can result in a transient drop in the supply voltage at the IC, then often an overshoot as the energy stored in the inductance during the spike is discharged. With lots of logic circuits this just results in longer time for the circuit to "settle" to proper logic levels. But in circuits that have memory elements (flip flops), the power supply transient can cause a change of state that is "remembered." Capacitors local to the load can supply some current and overcome that wiring inductance. They act as local charge reservoirs. If your connections to the power supply are long it is a good idea to use a fairly high capacitance, such as 10 µF somewhere between V+ and ground on the breadboard or PCB. Small ceramic capacitors in the range of about 10 to 100 nF are used as close as possible to the logic devices. The round red thing is a ceramic "disk" (or disc) capacitor. They aren't very popular anymore except in higher voltage circuits. "Monolithic ceramic" caps are now much more common for lower voltage circuits (up to 50 or 100 volts). Depending on the logic family you might use one ceramic cap for a few ICs that are close together or you may use one per logic package. Modern microprocessors as used in PCs have a huge number of decoupling capacitors surrounding the IC. They are absolutely essential to reliable operation. Rather than using convenient separate flexible test leads with banana plugs to connect a breadboard to a power supply it is very much better to use a pair of conductors with fairly thin insulation twisted together. The close proximity of the conductors reduces the effective inductance because the magnetic field around each conductor is opposite to that in the other conductor and the fields "cancel" each other. Inductance is the result of energy stored in a magnetic field.
Thanks for adding a Truth Table in the Description. Adding Logic to your output description was a nice touch. You rarely see that nowadays. Like someone will reverse engineer it Xor something. Not having it IS equivalent to sanding the part numbers on Cheap Chinese Products. Only thing they accomplish is buying time. God Bless.
This is way off topic. But could you instruct me how to make an LED flash 3 times. Then shut off. Using a button to start it again?? Sounds simple. But. I have no clue how. Thank You
Hello, very much enjoy your videos, just found you yesterday. But with my adriono uno R3 kit I received the "sn74hc595 & L239D" is there much difference between what you're using?
34:49 I just have to know, couldn't you have obviated all those red jumper wires, by putting your DIP switch modules across the gap from the power rail to the first column on the left? It looks like you would have had a lot more room that way.
I am surprised to see sb making a video about that topic and I am also kinda happy :D Just a small question, do you think that I can drive more than 8 Inputs from TTLs with just 1 TTL output (2 state version)
Haven't watched this yet but if he talks about gates OR AND XOR etc.. and includes ORCad and PSPICE then definitely worth a watch. EE's learn this first semester, if only CS students were taught this first semester also. But knowing how to do binary addition, multiplication and also Truth Tables and Kanrnaugh maps , converting between bases (like binary, hex, base10) and why. Will make you laugh at most people who struggle and don't even realize why, you will find them here on UA-cam, where keeping content to the level of either high school dropouts or grad students is the new normal. You need to know the basics, just using programs to build programs is garbage
So sorry for the delay since the last video was released, finally I have one for you. This is a long video, even for me, so if you want to skip to a specific section you can use the Table of Contents in the description. I actually have this is ALL my videos, not sure if everyone realizes that as some viewers never read the descriptions!
I promise that I won't make you wait as long for the next video. Hope everyone is well and staying safe!
I will watch this video asap. Which hardware (IC buttons etc.) do I need for replicate your circuits before I start the video? Thank You in advance
You should be a Khan Academy contributor! Great content.
TOO MANY EMBEDDED ADVERTS - THUMBS DOWN.
.
You put way too much effort into this. I don't think I'm going to skip any of it.
Hint: if you put the time first in the table of contents, UA-cam will create chapters that are easy to navigate (at least in the web interface).
Out of all the tutorial channels I sub to, you speak at the best pace to comprehend new terms / ideas. Thank you for your hard work!
Bill, you're a great teacher, video editor, communicator and technical knowledge source and you keep getting better. You're an international treasure. Thank you.
I am never confused during or after your presentations. Amazing precision of language and explanation. Thank you!
Hi ua-cam.com/video/TY-0M-z2lBQ/v-deo.html
why? why on earth would someone hit the dislike button on this video. seriously. why?
Not what they expected to hear.
Don't know why, I mean it is a long Video, but with interesting topics!
Mid way ads. What an annoyance.
mid way adds (I did not vote)
so, let me check if I'm getting this right:
A person (Bill, in this case) takes his precious time, knowledge, and effort to put up a massive video teaching some digital electronics, and shares it with the world, to whomever wants to learn. For FREE.
And people complains about some freaking ads?
I mean... to totally disrespect a quality content creator's work, just because of some ads that could provide some revenue to keep going on?
I'm trying my best to be polite, here. Seriously. This total lack of empathy is just... appalling.
THANK YOU, Bill and
DroneBot Workshop. You ARE appreciated. Your work IS appreciated.
Bill, you're a great teacher, video editor, communicator and technical knowledge source and you keep getting better. You're an international treasure. Thank you.
Hi ua-cam.com/video/TY-0M-z2lBQ/v-deo.html
man this is so precise and understandable
i love this
Hello Bill great to see your back hope all is well with you, This takes me back 35 years
Incredibly thorough tutorial! Thank you for taking the time to share your knowledge and interesting trivia with us!
Hi ua-cam.com/video/TY-0M-z2lBQ/v-deo.html
It's awesome.👌
I'm not going skip anything because it's interesting and educational too.
Add flip-flops and Karnaugh maps and he basically gave you an introduction to computer engineering college course, for free ;)
Doing those things rn, not fun lmao
Very helpful video. I liked it
This is an absolutely well thoughtout demo video for making the seemingly incomprehensible logic circuits easily understandable. Like all videos made by Bill, I am saving this one too for reference when needed. Thank you Bill for your hard work and making such educational videos freely available on youtube..
Hi ua-cam.com/video/TY-0M-z2lBQ/v-deo.html
I wish you were around in '79 when I was going thru my 'A' school for electronics. Far better explained than what the Navy gave us and expected us to learn. Thought this might be a fun refresher, but is much more. Thank you. Regarding your concern for the wait, it's well worth the wait. Well done.
53:58, not a big deal, but it is good practice to use "const int" for definitions such as the pin numbers, ir makes them immutable.
Anyone unfamiliar with the subject may not understand just how wide your search would have to be to gather all this information individually. There's nothing necessarily revolutionary about the info itself, but packaging it all together here and pre-chewing it for viewers new to electronics definitely earns a thumbs-up.
Excellent topic. Just what I wanted. :)
Where are you from?
This is a great video for beginners like myself to understand. Thank you.
YES, BUT
At 21:00 the narrator says that DTL uses more current than TTL. That wasn't true of standard TTL, but it is true of low-power TTL which is now used. It's also true that every time a TTL gate changes state it produces a near short-circuit for a nanosecond or two, which requires power supply lines to TTL to have HF decoupling capacitors distributed all around the circuit card.
This takes me back to 1962 and my first Navy school where I learned Basic Transistor Theory. We have come a long way in 58 years! Has it really been that long? Wow!
Great video, Bill. I think knowing about all these logical gates is a 'must' for everyone dealing with electronics since they are the core of all our favourite microcontrolers. Thank you for this Educational video!
You Sir are Awesome! Thank you for putting into words what was to me uncomprehensible a couple of years ago. This information is priceless.
This guy is just gold. So solid in his delivery of these really complex topics.
Dear Sir, thank you! Very helpfull and sooooooo well explained. I wished my kids had tutors like you.
This channel is more than a diy arduino channel which is a common thing. This channel actually teach me something and not just following an instruction.
Wow, too many commercials. It’s like watching television but with 4 times the advertisements. Unfollowing.
This takes me back to 1974 when I purchased my first 7400.Later I designed and built a 6 digit frequency counter. This was in 1977.
Fantastic video Bill, I am 72 years old and learning electronics to keep the brain cells moving. Your video’s are really helping.😊
basic logic IC chips is better understood when building bicore robots or other iterations of these robots using logic chips. These simple (minded) robots give a better understanding of their functions and how they function. Though this hobby is over a decade old, I still love to build these simple little robots both for fun and education. Search: Bicore, BEAM bots, and based on the 74ACT/HCT10 chips or the 74HC/AC240 chips. Again, as simple as they are, they're still lots of fun to make and observe.
Please post some videos of your BEAM projects to your channel!
@@Enigma758 Yes, OK. Will do. Thanks.
@@Enigma758 These are pics of one of my Beam bots with 2DOF, I'm putting a small video together of the other robots.
forum.allaboutcircuits.com/attachments/100_0986-jpg.16664/?cb=1600781201
forum.allaboutcircuits.com/attachments/100_1013-jpg.16665/
forum.allaboutcircuits.com/attachments/100_1019-jpg.16666/
@@eddietowers5595 Nice, looks very solid! A 2DOF "head bot" is on my backburner project list. Will look forward to seeing your other projects.
"Take all your MOSFET in your device aiming to youtube and watching this video..... ".... What a hilarious input device.... Hahaha ha...... (From South Africa)
Loved this video but thought you moved on to the esp32 with micropython. Micropython is so much easier to code and the esp32 is much cheaper than an arduino.
A week or so ago, I was sourcing parts for a project I'm working on and I discovered that a single ATTiny would be cheaper than the approach I was going to use with NAND gates. 😂
And a lot more flexible in case the design changes in any way.
But if you were to put it into production as a manufactured item, how much time (time=money) would the added step of flashing of the program on each of them add to your finished cost?
For most one-off and hobby projects, microcontrollers make sense. But the logic chips often make more sense for high volume production.
Wow! Right when I looked for this it was uploaded a week before. I'm tire of people showing stuff with an Arduino, I was trying to do it without an Arduino so thank you!
Excellent video. I'll be interested how you dell with the 74LS that is running at 5V and on a computer board that is running 3.1V. Would you need something to deal with the voltage change or is the high volt of 3.1 still trigger a logic of One on the 74LS?
If there is one YT channel I will support and I will, it's this one. Thank you for what you do.
That gave me some interesting memories; oh I am Computer Science grad, not Computer Engineering so I only had one class of gating and the practicals were MC programming on something already wired. Although there is a more elementary gating, OR is !(!A*!B) for lack of terms, AND and NOT are atomic, but OR is not.
Bill, you’ve got me stumped on the last two circuit designs. You’re showing 220 ohm resistors for the LEDs in your circuit drawing but I don’t see them on the actual circuit board. Am I missing something?
I work in a company doing PVD (Physical vapor depositions) coatings. The machines generate a glow plasma to sputter the target material on a substrate. The glow plasma is very susceptible to decaying into an arc, which is not desirable, however when arcing does occur, the arc event has to be recognised and extinguished within 500 nanoseconds. We use logic gates and 555 timers with cumulative gate propagation delays within 200-300 ns to detect and handle this. Any solution with a microprocessor would be impossible with interrupt execution latency of about 4 - 10 microseconds, 8 to 20 times the response time of the design requirement. This is one very good reason why discrete logic gates are still relevant.
Can you design a PID control using only op-amps?
This is why I started using MicroChip PIC 16C5x chips around 1996... TTL is nice and fast but complex. And expensive.
Man! That’s one fine video. Info packed and usable. This really satisfied many curiosities of mine. Thanks for putting it together! Fantastic!
That's correct, I hate using microcontrollers on simplest things, its overkill and it wastes a lot of idle current, especially if it runs on batteries
Great explanation of Logics gates ( and, nor etc) with great graphics. Thank You.
Great video. You have helped me with a current project greatly! Thanks for your great content. :-)
I want to draw logic circuits. I draw with pen and go through reams of paper and I can't fit my ideas on paper. I can't afford a program even if I knew where to get on. I barely know how to watch UA-cam on a Chromebook and I am 67 years old and on Social Security Disability as m
Mentally Disabled, The reason I can't afford anything. I don't trust where I would not have control of my system ala Windows 10 and the like. I want to know down to the logic gate and work from there.
3:24 {"Bill"(Stomach Gargle)} I just wanted to say I laughed so much I spent time To make sure you all can enjoy my slight off topic Note.
Could I use logic chips to setup and drive a single16 segment display. I want to use it for an automatic transmission shifter position indicator for the letters P, R, N, D, 3, 2, 1. What would you recommend if this is feasible?
Let me preface this by saying I greatly appreciate both your content and presentation, and I am currently both high and drunk.
With that out of the way, trying to sound as not dickish as possible (because I know this really has the potential to come off that way in a written comment), I applaud your courage in producing a long-form video for public consumption on the internet in which you speak the entire time given your particular…manner of speaking, I guess I’ll say? Although given the subject matter, I suppose anyone watching would be highly unlikely to say anything demeaning, so I suppose that by even bringing it up, I’m the odd one out.
Don’t do drugs, kids. See the stupid stuff it makes you think?
Sir, your videos are so well explained and so professional that I would like to say thanks, thank you very much for your work
as usual great content and well thought out ex[;aination. However, the ads are driving me crazy. getting one or a series every 4 or 5 minutes. Almost makes the whole thing unwatchable. You Tube is getting greedy to the detriment of both viewers and content makers. I really feel very stongly about being forced to break concentration to skip an ad. Sorry but may have to find another channel without ads.
there's definitely circuits to use these 74 series that aren't logic, for example mark tildens beam bot, which used one to flip flop a signal to make servos go back and forth.
edit: well actually it used two one for each servo, but still, good stuff especially since they can be had for less than a dollar a piece and there's probably millions of them sitting around on shelves everywhere
I really like the quote before every video, the one for this video was quite fun.
''It is a logical thing to do'' haha haha
great learning experience
referring to nand gates around 7:28, you said that the output was set to 1 "except" when A & B are "equal". Did you mean to say when A & B are both 1? According to the truth table when 0 = 0 the output is still 1
My god you guys are smart. Thank you for your time and knowledge. I’m trying to learn about electronics but I don’t know if I can grasp it. Lol
The Mosfets in my device are always extremely exited, when they realize they shall play one of the Workshop Videos. They are then so motivated - I think they would do it even without electricity. 😃
Great tutorial. I have always been inspired by the work you put into your tutorials. The graphics and visual aids are fantastic and as previously mentioned you're easy to follow because you don't rush the information however I was greatly disappointed in being interrupted by commercials.
This video was well worth the wait!!
@DroneBot Workshop I would love to take your fundamental course for electronics. Are you planning to offer a paid course?
What power supply are you using please to power the gates when operating without the arduino. (I.e 5v battery or whatever.)
Great videos
Thank you
You missed the ECL or emitter couple logic. It was preferred for high speed but ate power like a fat kid eating candy on Halloween.
at 26:26 the schematic seems to show a pull-down resistor but the explanation says "requires pull-up resistor". It would seem to require a pull-down resistor as shown in the schematic.
Awesome video Bill. Well worth the wait. Thanks for all the hard work and effort that you put into this channel.
where was this video when I was student , I am so old , thank you very much
Wasn't the Apollo computer comprised of 2800 NAND gates, or was it 2400
Use "AD BLOCKER" no adds!
me: *gets manscaped add
me: I'm a kid i don't have pubic hair!
7:28 must read "Are equal to a logic one" Just being equal would be the case for an EXNOR
I mean it is a long Video, but with interesting topics!
I like thinking of 'OR' gates as 'ANY' gates since *_any input_** returns **_high output_*
Awesome!! I wish you were teaching my college Electrical Engineering class! I mean it! 😃
Nice Methodology . it is different for me ! may God Bless your everything richly !
"It's the logical thing to do." Lol. Luv this.
25:06 HCT is compatible with older chips only because it's a 5V part?
thankyou sir! this really heps me understanding all logic gates and aurduino explanation is also so clear.
can you show a regular arduino schematics the one you provided in the tutorial webpage is hard to understand
Great explanation to the topic! 🙂
Thanks for this very helpful video. I appreciate your videos.
The or you created with nan gates was incorrect. That would just create a wastefull and switch.
bacon egg & cheese pizza? im afraid you be expeled from italian family
I have another reason to learn basic logic gates. I like to repair early solid state pinball machines.
may i know how to ensure that two differents of logic gates are compatible?
Thank you so much sir, I have learned so much from your video😊
At 20:35 you state that you can not make an inverter gate using RTL. That is incorrect. The most basic RTL gate is the inverter. 1 transistor and 2 resistors. The reason for RTL to be replaced was there poor fan out ability.
sir where i connect the end of the anti static wrist.? to the earth ground?
Digital logic is a lot of fun I used to build quite a few different types of circuits 36 years ago I now prefer to use arduino.
I once designed a circuit that had a sensor and it connected to a door lock you would carry around this little teeny black package with another eye on it and when you brought the two eyes in front of each other it would unlock the door. I still have the little black package right now but I don't have the schematic how I wired it up and I forgot I may have to reverse-engineer my own stuff but 25 years after I made this little infrared lock I seen something that people were selling that you could buy and put on your door same thing. And I never told anyone what I had created way back then in 84 so who ever discovered that did that on their own
how can you identife boards bought at a yard sale is there a app?
sorry I'm totally new to electronics, started off it as a hobby I have a software background. but in the circuit around 31:00 why he is using a capacitor? and is he using a round red resistance near the supply? if yes why is that so?
Those are "decoupling" or "bypass" capacitors (the terms tend to be used interchangeably when the caps are across the power supply rails).
All electrical conductors have inductance and resistance. Usually the resistance isn't a problem with small logic circuits, but inductance can be. The most important property of an inductor in this situation is that it opposes rapid changes in current (you cannot instantaneously change the current through an inductor). When logic device outputs switch, they tend to draw a spike of current that lasts nanoseconds (depending on logic family) but can be tens of milliamps. If there is inductance in the power supply lines, these spikes can result in a transient drop in the supply voltage at the IC, then often an overshoot as the energy stored in the inductance during the spike is discharged. With lots of logic circuits this just results in longer time for the circuit to "settle" to proper logic levels. But in circuits that have memory elements (flip flops), the power supply transient can cause a change of state that is "remembered."
Capacitors local to the load can supply some current and overcome that wiring inductance. They act as local charge reservoirs. If your connections to the power supply are long it is a good idea to use a fairly high capacitance, such as 10 µF somewhere between V+ and ground on the breadboard or PCB. Small ceramic capacitors in the range of about 10 to 100 nF are used as close as possible to the logic devices. The round red thing is a ceramic "disk" (or disc) capacitor. They aren't very popular anymore except in higher voltage circuits. "Monolithic ceramic" caps are now much more common for lower voltage circuits (up to 50 or 100 volts). Depending on the logic family you might use one ceramic cap for a few ICs that are close together or you may use one per logic package. Modern microprocessors as used in PCs have a huge number of decoupling capacitors surrounding the IC. They are absolutely essential to reliable operation.
Rather than using convenient separate flexible test leads with banana plugs to connect a breadboard to a power supply it is very much better to use a pair of conductors with fairly thin insulation twisted together. The close proximity of the conductors reduces the effective inductance because the magnetic field around each conductor is opposite to that in the other conductor and the fields "cancel" each other. Inductance is the result of energy stored in a magnetic field.
You had me at “the logical thing to do” :)
He must not have noticed his red screwdriver is tilted 5 degrees!!!
Think I will build one for my grandson. I will use a nano.
The 4004 was released in November 1971.
Thanks for adding a Truth Table in the Description. Adding Logic to your output description was a nice touch. You rarely see that nowadays. Like someone will reverse engineer it Xor something. Not having it IS equivalent to sanding the part numbers on Cheap Chinese Products. Only thing they accomplish is buying time.
God Bless.
This is way off topic. But could you instruct me how to make an LED flash 3 times. Then shut off. Using a button to start it again?? Sounds simple. But. I have no clue how.
Thank You
0:05, 24:01 could it be summarized?
"All TTL and CMOS logic gates operate at 5V, except 74C is 4-15V, and 74HC is 2-6V."
Hello, very much enjoy your videos, just found you yesterday. But with my adriono uno R3 kit I received the "sn74hc595 & L239D" is there much difference between what you're using?
Thank you so much 🥺❤️🔥❤️🔥❤️🔥
wow. around 1982-1989 I work as a teacher in digital, I teach algebra and other stuff and Motorola 68HC11 and Zilog Z80... So many memories...
34:49 I just have to know, couldn't you have obviated all those red jumper wires, by putting your DIP switch modules across the gap from the power rail to the first column on the left? It looks like you would have had a lot more room that way.
I am surprised to see sb making a video about that topic and I am also kinda happy :D Just a small question, do you think that I can drive more than 8 Inputs from TTLs with just 1 TTL output (2 state version)
Haven't watched this yet but if he talks about gates OR AND XOR etc.. and includes ORCad and PSPICE then definitely worth a watch. EE's learn this first semester, if only CS students were taught this first semester also. But knowing how to do binary addition, multiplication and also Truth Tables and Kanrnaugh maps , converting between bases (like binary, hex, base10) and why. Will make you laugh at most people who struggle and don't even realize why, you will find them here on UA-cam, where keeping content to the level of either high school dropouts or grad students is the new normal. You need to know the basics, just using programs to build programs is garbage