A clock circuit refers to a redstone circuit that has a function to produce a clock signal: pattern of pulses which repeats itself. Here is the introduction of the thing called Minecraft redstone or the clock circuit.
Clock generators are known as devices where the output is always switching between on and off. The name of the x-clock commonly is derived from half of the period length, which also usually indicates the pulse width. Here is an example for you. A classic 5-clock will give birth the sequence …11111000001111100000… on the output.
You have the chance to create clocks as short as a 4-clock by using only redstone torches and wire or sometimes by exploiting glitches. Easy construction of any clock down to 1-clocks is allowed by using repeaters or pistons. Apart from that, the other devices can also be pressed into service. In addition, there are also some special circuits known as rapid pulsers that can produce rapid pulses such as 1 tick clock. The rumor is true, the torch based rapid pulses can be too fast for repeaters. Even using repeaters, 1-clock signals can be too hard to handle in the other circuits, as a few components and circuits will not respond in a timely fashion.
Making long clocks more than one tick is not easy, as adding repeaters will eventually get unwieldy. Sometimes, you can toggle clocks without an explicit by wiring a lever or the other ones to the controlling block of an inverter or even a redstone loop. In short, forcing the delay loop will likely to stop the clock, but the output may not respond until the current pulse had made its way through the loop. Everything depends on the clock and where in the loop players force it whether the output will be stopped high or low. An alternative is to use a piston controlled by lever to open or close the loops, using either a block or redstone of a solid block.
One of the clocks is called observer clock. As a player, you will need 2 observers, a sticky piston, a lever, and some redstone dust. As for the redstone dust, it is an optional. You can use an observer with a redstone as well. First of all, you need to warp the redstone from the observing point over the top and around one side of the observer to the input. Then, break and change the redstone being observed. The last step is to add a lever for either on or off.
If you want to make a more simple and resource friendly clock, you can use an alternative method, which works by making an observer with a half circle of a redstone. In addition, there is also a very compact method for you to try. It is placing two observers with the observing end facing towards each other. Both of them will keep updating each other, creating a 1-tick clock. This one can be extended to more observers for slower clocks. After that, the piston can move the observer to toggle it.