Aux lighting controller design input

I ordered a set of 6" E Series lights with the combo pattern to mount behind the grill like Onepremier did in his post. I also picked up an FJ Off-road light switch for the dash.

Rather than using a switch and relay to control the lights I was thinking about different ways I wanted the lights to work. A switch and relay work perfectly fine but I think there is an opportunity to add some useful features to the lighting. These could also be viewed as unnecessary complexity.

Nevertheless, I am working on the design for a controller that can do the following and would appreciate any input about the functionality.

1) When ignition is on the aux lighting turns on when the aux light dash switch is on and the high beams are on. - no accidental blinding of oncoming drivers fumbling around to turn two switches off.

2) If ignition is off and the dash switch is pressed the lights will remain on for a user selectable period of time then turn off. The time delay is selectable by a set of jumpers on the controller, periods are 30sec, 60 sec, 120sec, 5 min. - useful to light the way to the house etc at night.

3) Provide a negative trigger input on controller which can be connected to alarm system or remote starter to allow remote operation of the lights for the same time period as the delay jumpers from above. - useful when camping or getting to truck in the dark

4) The indicator in the dash switch is operated by the controller, not just tied to the light circuit. The indicator can flash etc to show different operating modes. The time delay when ignition off could blink etc.

5) the controller will use semiconductor power switches that are common in industrial controls. These devices are cheaper than most relays and incorporate over current protection that can be monitored by the controller. The over current could be indicated on the dash switch.


I hope to have the first unit built up in a couple weeks to try out in the truck. If there is any interest I could build a number of these units.

I am also thinking about adding the circuitry to control the heated mirrors upgrade.
- timed operation on startup based on temperature
- negative trigger input so it can be tied into remote starter

 

Not interested in buying one, just interested in the ingenuity.