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I want my led strip lights to turn automatically off after 3 or 5 minutes of turning on.

Please, suggest a very simple circuit using capacitors which would block the circuit and turn off the LEDs continuously after 3 or 5 minutes.

Also, any problems to the capacitors in such case the circuit is blocked by the capacitors for long hours like 2 to 3 hrs.

Thanks in advance.

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migrated from mechanics.stackexchange.com Jan 2 at 9:35

This question came from our site for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles.

  • \$\begingroup\$ have you searched for any solutions? ebay and others sell suitable timer circuits.... \$\endgroup\$ – Solar Mike Dec 31 '18 at 8:39
  • \$\begingroup\$ Start here: startingelectronics.org/beginners/start-electronics-now/… \$\endgroup\$ – Solar Mike Dec 31 '18 at 9:32
  • \$\begingroup\$ That simple timer circuit will "work", but for times longer than a few seconds it will not be accurate and the timing may vary a lot with air temperature and glitches in battery voltage, e.g. brake or turn indicator lights coming on. The reliable way to generate time delays of minutes or hours is to use an oscillator with a stable frequency and count the number of cycles. If you want to design and make something yourself, use a microcontroller like a PIC or Arduino. \$\endgroup\$ – alephzero Dec 31 '18 at 10:14
  • \$\begingroup\$ Need to know supply voltage, current, is this for automotive application... \$\endgroup\$ – peufeu Jan 2 at 10:38
  • \$\begingroup\$ 12 v DC and current 2.5 amps max. \$\endgroup\$ – Thang Tons Jan 3 at 8:44
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You can use a NE555 circuit which is very popular and you will find tons of results on Google.

Although, I would suggest to rather use an Arduino, it will be simpler and you can have precise timing and can easily change to any time you want.

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