Diode Logic Gates - OR, NOR, AND, & NAND

This electronics video tutorial provides a basic introduction into logic gates using diodes, resistors, and LEDs. Examples include OR, NOR, AND, & NAND Diode Logic Gates.

How To Solve Diode Circuit Problems:

Clipper Circuits:

Clamper Circuits:

Half-Wave Rectifiers:

__________________________________
Full-Wave Rectifiers:

Full-Wave Bridge Rectifiers:

220V AC to 12V DC Converter:

Capacitor Voltage Booster Circuit:

Half Wave Voltage Doubler Circuit:

Full Wave Voltage Doubler Circuit:

__________________________________
Voltage Multiplier Circuit:

Light Emitting Diodes:

Power Dissipation In LEDs & Diodes:

Final Exams and Video Playlists:

Full-Length Videos and Worksheets:

___________________________________

Disclaimer: Some of the links associated with this video may generate affiliate commissions on my behalf. As an amazon associate, I earn from qualifying purchases that you may make through such affiliate links.

[ShonKinsley]

He must be genius for sure as he explains as simple and easy as possible with all points to make me understood in logic gates operations.

[luciamonedero]

i have a circuits exam (referral exam) in June and i just hope The Organic Chemistry Tutor uploads more videos related to OpAmps, Diodes, Transistors and Small Signal, otherwise i'm definitely failing. Thank you so much for all of the videos you upload, you've helped me a lot!!

[yvbuzan]

After watching this video, I now understand why you 've got almost 3M subscribers.You make things expicit to grasp, which will take me a long time and enormours energy.

[shahnawazmustafir]

Damn!! This is a great explanation. Cleared all my doubts.

[ralphacosta]

Wow! That sure wore my brain out trying to develop each circuit BEFORE you showed and explained the right circuit. I still haven't developed the intuitive understanding, but this certainly helped me better see the current flow and voltage differences. I've gone through your videos on circuit analysis and those helped me follow your explanations after the fact. My wife walked in while i was looking at the video and she (Masters in Adult Education) exclaimed "Now THAT'S the right way to teach!", being impressed with the clarity of how you had laid things out. Congratulations and thanks. I had to keep re-watching parts to fully understand, but definitely worth the time. I've watched videos which clearly explained how to use logic gates with switches (esp. ElectroBoom), but this is the first showing how the logic gates themselves can be built.

[atambaasiimwe]

This guy knows I'm his biggest fan

[sreerekhakp]

Ah thank you so much I've been searching everywhere for a reasonable explanation and finally ended up here.

[hitajuneja]

OR - 0:11
NOR - 3:40
AND - 8:30
NAND - 14:43

[rufussewel]

the best teacher in the world... he teaches in very easier way...

[TaiapxHs]

At 6:17, there is electrical potential of 4.3 V after diode and 3.0 V after the LED. Why is electrical potential set at 4.3 V and not 3.0 V at this location? Why is the larger chosen?

[TheBustyOnion]

Awesome video, also thank you for doing it with 5V and LEDs making it easy to test out a breadboard with an arduino. Great learning

[movealongnothingtosee]

thanks very clear explanations. it changes from academics :)

[PeetHobby]

5:30 That NOR example isn't a real gate, hasn't a real output that you can use, I wish it work like that, but you need a transistor to invert OR diode gate into a real NOR gate with output a signal.

[skidroww]

(1) At 6:17, there is electrical potential of 4.3 V after diode and 3.0 V after the LED. Why is electrical potential set at 4.3 V and not 3.0 V at this location? Why is the larger chosen?

(2) At 5:27, what is purpose of diodes in OR gate? It seems the circuit would work without them and they are redundant.

[lukwiyastephen]

Thanks very much for the very simplified explanation, you are a real pro

[tn]

17:00 why does the current flow through the R2 and the led instead of the path with R1?

[m.m]

thank you very much your explanation is very simple that make me understand very well 👏👏👏👏

[buckwheat_flower]

Brilliant explanation for this topic!
★★★★★

[karimotoum]

as always thanks for the hard work your putting out.

[rationalthinker]

What about all of the other logic gates such as XOR, negative-OR, negative-AND, negative-XOR, etc...Also on the AND-gate towards the end, you said the potential at the point right before the LED was 3.5-V, how is that possible? If the potential is 5-V at A or B and the Diodes drop 0.7-V across each of them, that leaves 4.3-V. Since 4.3 > 3.5, shouldn't that be the potential at that point?