I Made a Logic Clock Using a 555 Timer

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! .

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

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

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.