Logic circuits

Binary Number System
Logic gates

Logic gates
Diode-Resistor Logic (DRL)	Resistor-Transistor Logic (RTL)
NAND a universal gate	NOR a universal gate
Multi Input Gates
OR gate
Three-input OR circuit	Logic "OR" with LED Display
RTL OR gate	DTL OR gate
TTL OR gate	TTL OR enable circuit
Transistor OR gate	C-MOS OR gate
AND gate
AND circuit with three inputs	Logic "AND" with LED Display
RTL AND gate	DTL AND gate
TTL AND gate	TTL AND gate with three inputs
TTL NAND enable circuit	TTL AND enable circuit
Transistor AND gate	C-MOS AND gate
C-MOS 3 inputs AND gate	C-MOS 4 inputs AND gate

AND/OR circuit using op amplifier (AOP)
An inverter circuit	RTL inverter
TTL inverter	C-MOS inverter

Using the NOR gate	TTL NOR gate
DTL NOR gate	C-MOS NOR gate
C-MOS 4 input NOR gate	C-MOS 4 input NOR gate II

DTL Exclusive OR gate	TTL XOR gate
Transistor XOR gate	C-MOS XOR gate
XOR gate using op amplifier (AOP)	Jam Circuit

NAND gate	Special NAND gate
Logic "NAND" with LED Display	DTL NAND gate
C-MOS NAND enable circuit	A one-shot NAND gate
3 or 4 inputs NAND gate	NAND gate using op amplifier (AOP)

Logic NOR Circuit (Part 1)	Logic NOR Circuit (Part 2)
Logic "NOR" with LED Display	NOR gate using op amplifier (AOP)

De Morgan's theorem
Logic gate - Truth Tables
Logic gates - Variants
La miniaturisation avec en exemple un BCD (Décimal codé binaire / binary-coded decimal)

Buffer (Amplifier)
TTL buffer	RTL buffer
C-MOS buffer
Multivibrator
How a multivibrator Works	Transistor Flip-Flop Circuit
A "one shot" multivibrator	TTL tone generator
An R-S flip-flop
Flip-Flop with LED Display	Flip-Flop with LED Display / lamp
Multivibrator switching of led display

TTL R-S Flip-Flop 1	TTL R-S Flip-Flop 2
C-MOS R-S Flip-Flop	C-MOS R-S Flip-Flop II
C-MOS J-K Flip-Flop	R-S-T flip flop
One shot TTL	Transistorized toggle flip-flop
NAND toggle flip-flop	J-k toggle flip-flop
TTL astable multivibrator	Be your own multivibrator
C-MOS astable multivibrator	C-MOS latch
TTL j-k flip-flop I	T type flip flop
TTL D flip-flop	TTL j-k flip-flop II
C-MOS D flip-flop	C-MOS D flip-flop II
Transistor timer with TTL	Touch switch using NAND gate
Half adder	D-latch

Winking LEDs I	Winking LEDs II
Leapin' LEDs I	Leapin' LEDs II
Buzzin' LED	Son of buzzin' LED
Set/reset buzzer 1	Set/reset buzzer 2
Set/reset buzzer 3	Whistle generating circuit

Electronic
Selector et Register
Shift register	TTL data selector
TTL line selector	TTL latch circuit
Switching circuit	C-MOS line selector
C-MOS data selector	2-line to 4-line decoder
Selector TTL (AND, NOR, NAND)	Multiplier
Dual 2-input multiplexer	Binary adder circuit
3 to 8 Decoder / Demultiplexer	3 to 8 Decoder with timer
4 to 16 line Decoder / Demultiplexer	4 to 16 Decoder/Demultiplexer with Timer_LED
5 to 32 line Decoder 74HC138	5 to 32 line Decoder 74HC154
8 to 3 Line encoder	16 to 4 Line encoder
32 to 5 Line encoder	Four bit logic state comparator

Electronic / Électronique
Counters
Basic counter circuit	Synchronous counter
Asynchronous counter	Counter with line decoder
Divide by 4 counter	Divide by 4 counter with line decoder
How a line decoder works	Multiple counter
Binary counter with display	Divide by 3 counter with display
Divide by 4 counter with display	Binary counter with display 0-99
Idiot Circuit	Multiplier

Down counter	Up/down counter
Decade down counter	4 x 7 seg Countdown Timer
Dual 2-input multiplexer
Decade down counter with display	Presettable counter
Hexadecimal counter	Octal counter
Random access display	Decade counter
BCD counter with display	Octal counter with line decoder
Octal counter with display	BCD to 7-segment decoder
Decade counter with display	Decade counter with display II

Other
VCO by nor gate	Pulse-delayed circuit
NAND gate tone generator	Noise-signal discriminator
Pulse stretcher	Bidirectional buffer
Various inverters	Electronic switch
Tone burst generator	Digital timer I
Ten count buzzer	Digital timer II
Press first	Target Range
Hexadecimal counter 2	Catch the eight
S.O.S. Alert	NAND/NOR and transistor switch
Majority logic gate	Set/reset match
Edge-trigger circuit	Memory backup circuit
Quiz winner detector

Electronic / Électronique