Flashing LED with specific interval

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rwassell
Posts: 2
Joined: Fri Aug 19, 2016 12:28 pm

Flashing LED with specific interval

Post by rwassell » Fri Aug 19, 2016 12:32 pm

Hi,

I am trying to find a flashing LED kit, ideally just one LED in clear/white that will turn itself on for exactly 15 seconds and then turn itself off for two minutes continue in that cycle, on 15 seconds, off 2 minutes, etc.

It is for a one-off specific project that is a bit of fun so I am not looking to do something complex with a Raspberry Pi or anything like that.

I found this: https://www.rapidonline.com/Design-Tech ... GwodPq4NPw

But it has two LEDs and won't allow control over duration, as far as I can see.

I wondered if anyone here had seen anything like this or had any ideas if this could be adapted to achieve what I am trying to do?

Thank you in advance for any help.

Rob

David
Posts: 217
Joined: Sun Oct 04, 2015 6:18 pm

Re: Flashing LED with specific interval

Post by David » Fri Aug 19, 2016 4:15 pm

There is an almost unbelievable number of 555 timer circuits on Google. Look for "555 flashing LEDs", and be prepared to experiment with the values of the timing resistors (use trimmers or pots) and the value of the timing capacitor.

rwassell
Posts: 2
Joined: Fri Aug 19, 2016 12:28 pm

Re: Flashing LED with specific interval

Post by rwassell » Fri Aug 19, 2016 4:52 pm

Hi David,
It is know 'what' to look for that helps in these instances so thank you for the suggestions.
Regards,
Rob

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