Post by sall on Jan 30, 2012 20:50:18 GMT -6
As you know HID bulbs and ballasts do not like to be turned on and off in rapid succession even if if the bulbs have been warm a hot re-strike is still not good for them(especially after market. OEM ballasts are a bit less susceptible to this).
If you have your 'key transmitter response' set-up for an exterior lamp flashing on arm and/or disarm of the OEM alarm the headlamps will flash. If you are like me and like this feature as I do not always lock the doors when in range to hear the locks cycle this circuit will fix the issue. Also, the OEM alarm and panic mode will flash the headlamps when activated.
There are two variations o the circuit. Both inherently do the same function:
First diagram is positive switched to HID relay. Second diagram is negative switch to HID relay. I prefer the former over the latter. This is very simple circuit that can be made for less than $5 from parts at your local Radio Shack/Fry's. Personally I choose about a ten second time delay, but you can set it for whatever time by changing the resistor values. The formula to find seconds is:
t1(secs)=1.1*Ra*C/1000
So for 10 second delay you use 470uF capacitor and 21k resistor.
Here are both circuits operating the time delay. The delay is set at 2 seconds(470uF, 3k R) to keep the video short and sweet. When red LED lights up power has been applied 2 seconds later relay latches as 2 second timer is up:
I built this circuit and inserted between low beam trigger and relay harness with 9006 male/female pigtails for PnP connections. I will take some pictures of the PCB and wiring tomorrow while I am in there grabbing some pictures for DRL relocation!
If you are interested in said modifications but having trouble understanding/building the circuit please don't hesitate to ask. With a decent pair of ballasts and bulbs you are looking at ~$100 or more to replace, this simple mod can prevent that for a little longer! ;D
If you have your 'key transmitter response' set-up for an exterior lamp flashing on arm and/or disarm of the OEM alarm the headlamps will flash. If you are like me and like this feature as I do not always lock the doors when in range to hear the locks cycle this circuit will fix the issue. Also, the OEM alarm and panic mode will flash the headlamps when activated.
There are two variations o the circuit. Both inherently do the same function:
First diagram is positive switched to HID relay. Second diagram is negative switch to HID relay. I prefer the former over the latter. This is very simple circuit that can be made for less than $5 from parts at your local Radio Shack/Fry's. Personally I choose about a ten second time delay, but you can set it for whatever time by changing the resistor values. The formula to find seconds is:
t1(secs)=1.1*Ra*C/1000
So for 10 second delay you use 470uF capacitor and 21k resistor.
Here are both circuits operating the time delay. The delay is set at 2 seconds(470uF, 3k R) to keep the video short and sweet. When red LED lights up power has been applied 2 seconds later relay latches as 2 second timer is up:
I built this circuit and inserted between low beam trigger and relay harness with 9006 male/female pigtails for PnP connections. I will take some pictures of the PCB and wiring tomorrow while I am in there grabbing some pictures for DRL relocation!
If you are interested in said modifications but having trouble understanding/building the circuit please don't hesitate to ask. With a decent pair of ballasts and bulbs you are looking at ~$100 or more to replace, this simple mod can prevent that for a little longer! ;D
