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.