Nand toggle flip-flop
Électronique / Electronic

If you're starting to suspect that the NAND gate is a very versatile circuit, you're right!

Here's a toggle flip-flop circuit made from four NAND gates. Put the power ON after you finish building this circuit. Press the Key several times.

You'll see that LED 1 turns on and off each time the Key is pushed. Put on your thinking cap and try to trace what happens from the Key input to LED 1.

Of the four NANDs, two function as an R-S flip-flop. See if you can figure out what the remaining NANDs are doing. This circuit is also an inverter of sorts, since it does take the input and "reverse" it.








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