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I just brought a bar light for my vehicle. My problem is the light has 4 modes (white, white flashing , yellow, yellow flashing) and the modes are triggered by turning the light off then on in less then 7 seconds. I only want steady white light so I need a delay circuit that when the light is turned off it can not be turned on again for 7 seconds.

I can find plenty of circuits that give a delay of 7 seconds from switch on but I want the timer to start when the light is switched off so it always starts in the first mode which is steady white.

Just to be a bit clearer say the light is switched off for 5 seconds then I should only have to wait 2 seconds for it to come on. Or say it was switched off for 10 minutes it will come on immediately. I just can not get my head around how to achieve this and when I try to find an answer I always get how to delay a load to be activated after a certain time after switch on not switch off.

I should also mention I have the bar light powered by a relay that is switched on and off by the high beam so the high beam always come on instantly. It does not matter if there is short delay between the high beam coming on and the light bar coming on but it would be better if there was not as we have a real kangaroo problem on our country roads. Usually there is about a 7 second delay or more between dipping the high beam for an on coming vehicle then reactivating the high beam.

But there are many instances when I want to just flash the high beam and thats when I get into problems with the bar light strobing white or going yellow. Then I have to leave the high beam off or quickly cycle though all the modes and 7 seconds is way to long to be driving blind.

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  • \$\begingroup\$ It might be easier to bypass the sequencer in the light bar. \$\endgroup\$ – Sunnyskyguy EE75 Dec 14 '18 at 2:31
  • \$\begingroup\$ Can you ask the OEM for a jumper fix? \$\endgroup\$ – Sunnyskyguy EE75 Dec 14 '18 at 2:37
  • \$\begingroup\$ I wrote to the supplier but it was like I was speaking another language (which i suppose I was) and there reply was to cycle through the modes. I pulled the bar apart to see if there was some way to stop it cycling but I could not work out how it operated and there was no obvious connections to do that. \$\endgroup\$ – terry1738 Dec 14 '18 at 12:30
  • \$\begingroup\$ Perhaps list the model number/brand and insides for the readers here to decide. Your supplier may not have the understanding required and your purchase power may be small. There also may be better LIGHT sources if you can define what is best for Roo avoidance. Perhaps an automatic headlight or ambient light - detecting dimmer that keeps power on with ignition or spot lights at different angles away from oncoming traffic. \$\endgroup\$ – Sunnyskyguy EE75 Dec 14 '18 at 17:10
  • \$\begingroup\$ Thanks for the reply Tony its an autofeel 4 row 30 inch bar. Its more of a flood light that extends a fair way ahead of the vehicle and you get the reflections in their eyes. That works really well just this mode cycling is the problem. The other problem in Australia are wombats these animals are made of granite and while small they make a real mess of your undercarriage if you hit them. \$\endgroup\$ – terry1738 Dec 14 '18 at 23:16

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