Sorry to intrude, but I thought that this was not a pic. Seems I read different takes on what it is or is supposed to be. It seems that it's a replacement for the "3 Terminal Flasher No. 263", so would just require three connections to operate. That's without the turn delay item. So are pics out or?

 

jkwilborn:

The clever system basically adds turns signals, hazard lights (4-way flashers) to cars that don;t have them with a inertial self-cancelling system. They are, by nature require a momentary signal to use. The easiest is to make the turn signal switch momentary. It can be done sometimes by modifying the stalk switch. When you refer to vintage, the car may not have ever had turn signals, They were hand signals back then. The clever system also has outputs for the dash indicators.

Over the years, Turn, brake, parking and side-markers changed. Lot's of options. Initially, the brake light filaments were used for turn.

Take, this http://www.1970mgr.org/_TurnSignals.htm for example, it's not a simple switch, but the car had hazard lights.

I think I added 4-ways (Hazard) to a 73 vehicle of my own design using relays.

The 900 is unique enough, that it requires it's own interface.

There may be systems that used ON-OFF-ON turn signals and that was what I initially looked at. The 900 thing is not that sort of system. Moving the bulb into 3 positions was unexpected.

Those systems where hazards are already integrated might require something else.

I personally believe that Gary would benefit more if the Hazards worked all the time and not just in IGN or ACC.

 

Seems like the perfect application for a pic

Thanks for the explanation

 

It may be to much for a pic. If you take a look here: https://en.wikipedia.org/wiki/Inertial_measurement_unit a lot can be done. The whole point is that you can calculate the position vector from accelerations. At this level,the acceleration due to gravity is not a constant. The integral of acceleration is velocity and the integral of velocity is distance, so you can determine position in 3 axis.

Your beverage cup filled with a beverage tilts during a turn. That's basically how the turn signal is cancelled.

==

There may another interconnection method for vehicles that have turn signals an warning light of the design of that era. The three terminal flasher. With the three terminal flasher removed and the switch internal to the flasher shorted,

The wires to the dash indicators could go to the device and the device's indicator outputs would go to the original signals. The clever device requires extensive wiring, so it basically "takes over". The input would actually be "steady state" signal, but it would integrate in an unexpected way.

With the flasher out and the contacts shorted, the inputs become left indicator and ight indicator with the truth table similar to:

RI.....LI
1.......1 Hazard mode
1.......0 Right turn mode
0.......1 Left turn mode
0........0 Off

The issues that always turn up is whether or not positive or negative is switched. So, this also assumes the switches are functional. Having enough "wetting current" (about 10 mA) should assure it working. So, yes, this basically requires steady state inputs and integrates the hazard functions.

I don;t know if I;m making sense or not. Historically I'm a little familiar from 1968 onward, but not all vehicles.
1968 had a turn signal lever that was broke and a 4-way dash mounted flasher.

I remember another vehicle that had a button on the steering column that did the 4-way flashing.Wilmington, DE

A 2000 Impala basically has everything integrated into the Hazard switch and it has the low current stalk. I have the wiring diagram.

Another question that would come up, is how this might affect trailer connections?

It's been so long, I even forgot how the front turn signals were implemented. I think they used the dual filament bulbs like the brake lamps did.

Is 6, 12 and 24 accommodated? How about negative and positive ground systems?

Then I've seen weird indicator placements, like on top of the fender as well as the dash.

It's like the gas cap filler doors behind the license plate or under a tail light. There is even cars with a main and reserve tank.

I think I see some merit in supporting:
1. momentary inputs with a separate hazard switch (the current Clever design)
2. The 900 series with integrated indicator and hazard switch
3. A car with a 3 terminal flasher that came with hazard, indicators and turn signals.

A. Supporting hazard from battery and not ignition. Distance auto-cancel failsafe?
B. Support a recorded click with volume.
C. A less invasisive system that doesn't really auto-cancel,but increases awareness.
e.g. an audio signal that the system though the turn should be cancelled and/or volume control of the click.
A chime or louder click at the point where cancel would be detected would do.
D. A cancel mechanism for all options. (possibly an additional momentary input)

There may be varients such as 6 V, 12 V, 24 V and positive and negatiive triggers as well as positive and negative ground.

 

When I first saw this thread, I thought, turn signals are not just for indicating turns. They are for communication. It seems most of the replies are focused on just the former.

Anyone who has seen Chevy Chase's movie "Vacation," which is built around a trip to Walley's World, may remember the scene in which he describes why his right turn signal is on. In brief, when you get to a certain age, turning your right-turn signal on doesn't mean you plan to turn at the next right. It's a defensive move.

If someone is following you too closely, you can use it to make them back off.*

I wish I could deactivate the auto cancel feature in my new Fusion. So, as the TS strives to improve the old turn signal, please don't mess with its other functions.

John

*Always use the right (in USA); otherwise, someone may turn left or dart out in front of you, which is not safe.

 

So basically you're using it like 'inertial navigation' like on board a ship, but not to that detail. Does this require floating point math, which slows things down? The only overload may be math and it may be much quicker to convert to integer math which would free up the processor. Since you are not really after great precision...? I use a stand alone 328p a lot (have a drawer full), running at only 1 mip (internal 8 Mhz / 8) and it's plenty fast for this type of stuff, probably even the math with floating point. I've run them quicker, but haven't had an application that was timing critical, which I don't think this one really is either. Don't think the driver would notice a few milliseconds.

 

The "secret sauce" is in the algorithm. so as Gary said his box doesn't work on motorcycles, but another unit, whatever it may be does. The lean and signal direction are both looked at, and supposedly the turn gets cancelled when the motorcycle rights. i.e. ignores the leaning into the turn and cancels when the motorcycle rights.

If one did distance cancelling that would be the hardest because you really don't want to miss data. The dynamics class i took, was like: What's the vector velocity of the fly on the propeller of an aircraft moving with this position vector relative to the rock on the ground. Annoying at best.

here's a video that's

that explains dead reckoning.

I guess for the "purests", putting a motion sensor on the stalk seems to work. http://turnalarm.com/

 

One of the less helpful responses I got on another forum was "How hard can it be? Just hook a mercury switch up and be done with it." I guess being "done with it" means different things to different people.

 

Obviously a mid-level or up manager