Digital Electronics

A free video course for ECE students and VLSI freshers: from binary numbers and logic gates to flip-flops, state machines and the bridge to CMOS. Short animated lessons (3–6 minutes) with notes under every video.

🎬 33 lessons⏱ 3–6 min each📝 Notes under every video🆓 Free

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SEMICON WEEKLY · VIDEO COURSEDigital Electronics1 of 33 lessons out · a new lesson every few days · next: CMOS

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Module 1: Numbers a computer understands5 lessons

1Analog vs Digital3:19 min · Dimmer switch vs light switch▶ Watch
2Binary numbersCounting on fingers with only up/downComing soon
3Hexadecimal & OctalColour codes like #FF0000Coming soon
4Negative numbers & 2's complementCar odometer rolling back 0001 → 9999Coming soon
5CodesWhy a rotary knob uses Gray codeComing soon

Module 2: Logic gates & Boolean algebra8 lessons

6AND, OR, NOTTwo switches in series (AND) vs parallel (OR)Coming soon
7NAND & NORBuild any circuit from one brick typeComing soon
8XOR & XNORStaircase light controlled from two endsComing soon
9Boolean algebra lawsSimplifying = fewer gates = cheaper chipComing soon
10De Morgan's theorem"Not (tea AND coffee)" in plain EnglishComing soon
11SOP, POS, minterms & maxtermsWriting a rule from a truth tableComing soon
12Karnaugh maps (2, 3, 4 variables)Solving in 30 s what algebra takes 5 minComing soon
13Don't-care conditionsBCD inputs 10–15 never happenComing soon

Module 3: Combinational circuits (output depends only on inputs now)8 lessons

14Half adder & full adderHow a calculator adds 1 + 1Coming soon
15Ripple-carry vs carry-lookahead adderWhy a 64-bit add can't wait for 64 carriesComing soon
16Subtractor (using 2's complement)Subtract by addingComing soon
17Multiplexer (MUX)TV remote choosing one channelComing soon
18Demultiplexer & decoderPost office sorting lettersComing soon
19Encoder & priority encoderKeyboard telling which key is pressedComing soon
20Magnitude comparatorWhich number is bigger?Coming soon
21Hazards & glitchesFlicker in a light when switchingComing soon

Module 4: Sequential circuits (circuits with memory)9 lessons

22LatchesA doorbell that stays ringingComing soon
23D flip-flop & the clock edgeA camera that clicks only on the beatComing soon
24JK & T flip-flopsA light that toggles with each pressComing soon
25Setup time, hold time & metastabilityJumping on a moving busComing soon
26Registers & shift registersA queue at a ticket counterComing soon
27Asynchronous (ripple) countersOdometer digits rollingComing soon
28Synchronous countersOrchestra on one conductorComing soon
29Finite state machinesTraffic light controllerComing soon
30FSM designUnlocking a phone with a patternComing soon

Module 5: Bridge to VLSI3 lessons

31MemoriesWhy RAM forgets when power goes offComing soon
32Propagation delay, fan-out & powerWhy a gate can't switch instantlyComing soon
33From gates to transistorsEvery gate you learned is made of transistorsComing soon

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