555 TIMER as Astable Multivibrator.
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You can Take 555 TIMER as a component besides the old ones to make your project with.
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Control the frequency by this formula
1.44
f = --------------------------
(R1+R2) ×C
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Control the duty cycle by this formula
R1
Duty cycle = -------------- ×(100% )
R1+R2
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For those who try to do it and did not success because of ""can not solve "" message
You must do the following to work :
1- the program need the intial condition to make control so cut the outside component of 555 timer by switch and start the smulation without closing it to set the intial conditions .. and then close it and your 555 timer will work.
2- Decrease the simulation time . To allow your CPU to execute without lagging
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