It's brilliant if you're a lazy git like me and I'd hate to think how complicated it gets "behind the scenes"
ATB
Simon
I see some OEM's have start/stop on the same button.
Is there some magical electronics behind this? or, can it be wired up easily?
I know of somewhere that sells a switch that you flick from the off position to ignition on, and then push past that and there is a momentary position that will crank the engine. So if does everything in one switch but haven't seen a button that will do that.
Start-stop buttons are digitally controlled generally. There are a few about that do the momentary extra push idea but I've never seen one sold. Far easier just to use the key!
Yes I think their would be some electronics behind the switch. But nothing to complicated as the push button would activate a toggle relay I guess.
Quite a few toggle relay examples on the net based around a 555 timer IC with a transistor and a few more components. Just google "Toggle relay
circuit" if your after a locost solution.
Eddie
You don't want a toggle relay though, you want a button that both arms the ignition AND triggers the starter /until/ the engine has started, then disengages. Sure you could use a separate toggle for the ignition, then a timed momentary for the start process but you're risking either not starting or leaving the starter engaged once started. In modern cars they use feedback from the ECU to terminate the starter - this could be done with some ingenuity bur I think the OP is looking for a plug and play solution.
Sorry I thought the question was.
Is there some magical electronics behind this?
Eddie
Yes there is electronic trickery, we have a BMW with one, you tap the button to start and it will crank until the car fires, tap it to shut off.
It uses the same cleverness for stop/start when waiting at traffic lights etc.
The one in the ford my dad rented was the same, gives instructions to a computor and was apparantly a pain in the arse as the car stalled easilly.
Apart from anything thing else you need an obvious indication which position the ignition switch is in that doesn’t depend on an electrical
supply, yes it could be done with a bit of electromagic (for example a PIC circuit) but life is too short. Push buttons are fine for starters but
best to avoid push buttons or even push pull switches for the ignition.
Keep it Simple and keep to accepted conventions with safety critical controls.
My Espace has keyless entry so you walk up to car, sensor detacts keycard, IR detector behind handle sensors bodyheat from hand and unlocks car, pull
handle and get in. Push start/stop button, engine starts, stick it in gear and let out clutch and it releases handbrake. When done push button, turns
off engine and applies handbrake. Get out of car and walk away as car locks itself.
It's brilliant if you're a lazy git like me and I'd hate to think how complicated it gets "behind the scenes"
ATB
Simon
quote:
Sorry I thought the question was. Is there some magical electronics behind this? Eddie
More information on "Relay Toggle Circuit" can be found here http://www.bowdenshobbycircuits.info/page9.htm
If you used the "Relay Toggle Circuit Using a 555 Timer" to control the ignition circuit and a delayed timer to activate the starter that
just leaves switching off the ignition circuit without activating the starter. Admittedly I haven't figured the last bit out.
Eddie
quote:
Originally posted by Smoking Frog
More information on "Relay Toggle Circuit" can be found here http://www.bowdenshobbycircuits.info/page9.htm
If you used the "Relay Toggle Circuit Using a 555 Timer" to control the ignition circuit and a delayed timer to activate the starter that just leaves switching off the ignition circuit without activating the starter. Admittedly I haven't figured the last bit out.
Eddie