How to make 1 hz Clock signal ?

Question

I have to try out basic logic circuits like the flip flops , counters etc at home . But they all require clock signals which i find hard to implement myself. I only need a 1 hz signal.

A stupid question , is turning the switch on and off every 1 second, enough ?

Answer 1

You can use a 555 timer to generate a 1Hz (or variable) clock signal. The circuit is simple.



Doing it with a switch is not ideal because you get switch bounce, which means you can get 1, 2, 3 or more pulses every time you operate the switch. The results will be confusing! Normally when you have a switch feeding into digital circuit you use some sort of switch debounce circuit (or routine in a microprocessor).

Answer 2

Not very accurate, but functional

Build a flip flop circuit or use an op amp to generate a 1 hz square wave

Answer 3

It depends on the accuracy you need. Most high accuracy clock sources are high frequency devices. To use one just connect a counter to reduce the frequency.