| Electronics > Beginners |
| A one time timer |
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| iamashwin99:
I need to switch on a motor for 5 minutes once it receives a 5v input and stop after 5 minutes. And this should cycle again once restart it. I want to do this without a micro controller. I think it should be possible with a 555 but im a newbie here and i dont know how to use it to get this output. Can some one suggest me a way. |
| larsdenmark:
This should help: https://electronics.stackexchange.com/questions/180716/555-timer-one-shot-trigger |
| Benta:
Use a CD4538 or MC14538. A much better choice for this. |
| Brumby:
You could do this with a 555. However 5 minutes is a bit of a long period and you may get some variation on that time, so it depends on how precise that 5 minutes needs to be. |
| iamashwin99:
I dont need it to be precise, anything from 5-8min is acceptable. But even then how do accomplish it with a 555. If the question isnt clear, the input and the output waveforms are as in the attachment, the input can be from a button press(which can last a few sec) and the output has to be high for 5-8 minutes. |
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