I searched for day but dont understand how to use the formulas to calculate the on off times of a 555 timer. I have been playing with the Yenka software and i almost have what i want but im not sure if it is ok. I really only have limited knowledge of this stuff. I know alittle about resisters and capacitors but nothing about how they work together.
I have a 6v 4mA battery running a motor continuously at an unknown RPM. I want to use a timer to run it for about 5 seconds on and 5 seconds off. My simulation shows that the motor winds up and down at these times but dosnt turn on and off. I have seen a npn transister used in a few schmatics but cant get it to work right in the yenka software. I have been just guessing up to this point. I also noticed that the resister on th output leg of the timer seems to control RPM of the motor. Is that needed? Here is what I have come up with. Dont laugh to hard.
I have a 6v 4mA battery running a motor continuously at an unknown RPM. I want to use a timer to run it for about 5 seconds on and 5 seconds off. My simulation shows that the motor winds up and down at these times but dosnt turn on and off. I have seen a npn transister used in a few schmatics but cant get it to work right in the yenka software. I have been just guessing up to this point. I also noticed that the resister on th output leg of the timer seems to control RPM of the motor. Is that needed? Here is what I have come up with. Dont laugh to hard.
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