I made logic clocks for a 16-bit computer that I am making and I will be releasing Instructables on each part of the computer build .The computer that I am making was inspired by an an 8-bit computer made by Ben Eater , a youtuber , so if you want to know how to make your own basic computer and understand exactly how each part works I recommend that you watch his videos Building an 8-bit breadboard computer! .

Supplies

For this project we are building two clocks so your going to need :

5V battery

NE555 (x2)

2uf capacitor

100nf capacitor (x3)

1k ohm (x3)

100k ohm

10k ohm

LED (x2)

200 ohm

1Mega ohm

DTS2R push button switch

300nf

Step 1: FOLLOW THE SCHEMATIC

As we can see from the above schematic there are two circuits , an a-stable clock circuit and a monostable clock circuit . The first creates pulses that alternate from +5V to 0V over and over again , this will turn the indicator Led (D1) on and off periodically . The second does not alternate and instead has one stable state , but by pressing the button you cause it to switch states , so the indicator Led will go from low(0V) to High(5V).The values of the components are as follows :

A-stable circuit :

C1 - 2uf

C2 - 100nf

C3 - 100nf

R1 - 1k ohm

R2 - 100k ohm potentiometer

R3 - 10k ohm

R4 - 1k ohm

D1 - LED

Monostable circuit:

R1 - 200 ohm

R2 - 1k ohm

R3 - 1Mega ohm

C1 - 300nf

C2 - 100nf

D1 - LED

Step 2: TEST THE CIRCUIT

Ensure that all your connections are correct and then connect both circuits to the 5V battery . You should see the a-stable circuit's LED pulsing periodically while the monostable circuit's LED should turn on only if you press the button .The circuits rely on NE555 IC that is used as a timer delay . The time delay is controlled by an external resistor and capacitor , the frequency is controlled by two external resistors and the IC can handle input voltages from 5V to 16V.