Idea: Jammer auto-kill device

[CJR238]

or just buy a ZR4.

[swarga]

The idea is, the device would sense when the jammer is jamming and the driver drops speed, and using some kind of algorithm, would make an educated guess as to what the PSL is and kill the jammer when the car's speed drops to that level (or some small amount above that level).

That's easy: watch for a brake application followed by a sharp reduction in speed. If a laser alert is currently active when this activity is observed, pulse the mute/jammer kill output. Piece of cake, especially when you're hooked into the vehicle bus and can easily monitor various parameters such as vehicle speed and whether or not the brakes are being applied.

I might just steal your idea and add it to the HUD-One.

[TSi+WRX]

^ And make some sort of modular plug-in "HUD-One" so that those of us who don't drive 'Vettes can use your awesome interface.

[Darkflame]

Here's a kit you can build that will do this. Unfortunately it is only for 1 set speed. I.E 55MPH, it won't change based on city or hwy driving but it is something you can look at.

http://www.opengpstracker.org/gps-speedometer.html

I've used his kits before, I have the gps tracker on my bike and it has worked when it got stolen. I have since moved it to my car now.

Talk to mike, he is the creator of these projects, perhaps you can explain to him your cncept and he can devise an update in the code.

For example, set the device at 35, but if you travel over 50 for a period of say 60 seconds then change the limit value to 55 since you are now on the freeway (unless you rip it 55 all day in city streets).

From here jammers are armed at 35. If you proceed to 55 the limit moves up. if you are tagged at 65 pull back to 55 and jammer turns off.

Tell mike the following rules
relay arms at 35 (or initially set value)
if speed exceeds value, close relay
if speed falls below value, open relay
if speed remains over 42 but under 47 for 10 seconds set limit to 47
if speed remains over 50 for 20-60 seconds <---you decide increase limit to 57 and assume you are on freeway.
if speed falls below 57 at this time, then apply following rules
if speed falls between 50-57 for 2 seconds open relay else open
if speed falls below 50 within 1 seconds leave relay closed else open
if speed falls below 45 within 1 seconds leave relay closed and set limit to 47 else open
if speed falls below 40 set value to 35, leave relay closed for 1 second then open
else
open relay


This would have you covered but you would need to be careful for a speed trap that involved a freeway going from 55->35 as you would be without coverage if you did not decelerate to the psl. When getting tagged above 55 you would be jamming until you decide to slow down, once you slow down to 55 the jammer would turn off in 2 seconds unless you keep decelarating. If you decel beyond 50,the limit is lowered to 47, below that and it is again lowered to 37.

If you hit a patch if 45mph turf then do not decel below 40 otherwise you'll be naked for 10 seconds once you past that limit.
That's about the only hole I can find in that formula.

[TSi+WRX]

^ Very nifty!

[kpatz]

I came up with another idea that would be simpler to implement (no need to tap into anything other than the brake light switch and the jammer mute output). It also addresses an issue mentioned by Donut Patrol in another thread, which is having to remember to turn the jammers back ON after an encounter.

Basically, when you are hit and the jammer activates, you will typically hit the brakes to slow down to PSL. The auto-kill would detect this, and wait until you release the brakes (assuming you've slowed to PSL) and then auto-kill the jammer.

Next, while the jammer is killed, an audible alert would sound until a button is pressed to re-arm the jammer (after passing the LEO). The alert is to ensure you don't forget to turn the jammer back on. Alternatively, if you wanted to tap into the ECU bus or have some way of determining vehicle speed, the device could re-arm the jammer after you accelerate 5-10 mph over the speed that you braked down to.

Of course, there would also be a timed jammer kill and a manual kill button so you can override the automatic function, say if you don't brake during an encounter, or are going below PSL and see a laser LEO up ahead and want to avoid jamming them entirely.

[untrueparadox]

that sounds really cool. i hope the future laser/radar/camera equipped all-in-one system has the ability to do tha. i just hope it wont cost an arm and a leg for such a feature.

[glockboy20]

i prefer 2 new m47 sets so when i get shot w one set i wait slow down and turn on the other set then first set shuts down leaving 2nd set running so i dont disable the software on anti jamming mode there sounds great 1,100.00 8 heads LOL......

[Darkflame]

I came up with another idea that would be simpler to implement (no need to tap into anything other than the brake light switch and the jammer mute output). It also addresses an issue mentioned by Donut Patrol in another thread, which is having to remember to turn the jammers back ON after an encounter.

Basically, when you are hit and the jammer activates, you will typically hit the brakes to slow down to PSL. The auto-kill would detect this, and wait until you release the brakes (assuming you've slowed to PSL) and then auto-kill the jammer.

You can do this with a DEI-528T timer relay.

Wire the relay to the brakes. When you press the brakes, power is applied to the relay which then begins counting. If brakes are applied for 10 seconds for example it will cut power to the jammers. This will shut them off. Once you release brakes the relay will reset and jammers turn back on again.

Problem here is that you have a 10 second delay to turn off. Once you release brakes it will instantly turn back on again. You can avoid this by having a second dei-528t wired oppositely to turn on jammers only after 10 seconds etc.

Then 10 seconds of brake to disarm, 10 seconds of no brake to arm (or 90 seconds) if you want a longer rest time before power up.

This is essentially serving the same function of the LI's new rest feature. If you have a LI there's no point. If you don't well then it's possible with enough wiring. I think you're better off just building the kit I described earlier. It's has more functionality and will probably require less wiring.

Also tapping mute and brake lights will not accomplish what you want, what you are doing is stealthing your brake light so an leo won't see you slow down. This is dangerous if you have ABS systems or on cars with smart sensors that monitor events light brake lights etc.

[kpatz]

Also tapping mute and brake lights will not accomplish what you want, what you are doing is stealthing your brake light so an leo won't see you slow down. This is dangerous if you have ABS systems or on cars with smart sensors that monitor events light brake lights etc.

I'm not referring to disabling brake lights, I said "tap" the circuit so the jammer killer can sense when the brakes are applied and released. Brake lights still work, ABS still works, and jammer gets turned off/on based on when you apply/release the brakes. Tapping the mute circuit is so the killer knows when the jammer is actually jamming or not, since you don't want the jammer to shut down everytime you hit the brakes.

I'll have to read up on the LI's "Rest" mode...

But while talking about disabling brake lights: you would only want to disable them for rear laser shots. And for safety, you'd probably want a second brake switch that overrides the lights (making them work) when you brake harder. For front laser shots, having the brake lights go on immediately upon jamming (even before braking) can help warn those behind you of the trap up ahead.