RazMan
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| posted on 4/3/07 at 12:23 PM |
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Indicator warning sounder?
I am always leaving my indicators on - the warning light is so small on the Evodash that I can't see it properly in bright daylight. I was
wondering if anyone knows of a warning sounder that will chip in after say, 20sec or so as a reminder to cancel them.
[Edited on 4-3-07 by RazMan]
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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BenB
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| posted on 4/3/07 at 12:46 PM |
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couple of diodes, 555 unit, put the signals through the diodes to the Vss of the 555 (and the enable) on a monostable to give say 30 seconds pulse
before the output goes low again, put a buzzer across the output with the other wire of the buzzer to +ve... For the first 30 seconds all quiet, then
if the signal remains +ve the buzzer goes off... If you cancel the indicator the voltage drops off and the circuit collapses....
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miegru
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| posted on 4/3/07 at 12:47 PM |
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I have the Westifeld solution that works perfectly for me: it cancels automatically after 15 seconds (or something like that time, never measured
it).
A friend gave it to me so I don't know the costs. However there should be cheap timer switches out there.
Is also allowed for SVA by the way.
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RazMan
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| posted on 4/3/07 at 12:48 PM |
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Luckily I can turn down the Evodash's brightness at night so that is not a problem. The trailer buzzers would be a simple way of doing it I
suppose but they will always be on and that would get on my nerves.
The problem is compounded because my indicator are all leds so they don't make any noise whatsoever - at least a conventional system would
produce a 'tick tick' from the flasher unit.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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ruskino80
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| posted on 4/3/07 at 12:48 PM |
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i went for piezos,yes annoying but you know where you are with them,i also considered the clockwork type(svc)-but these do not allow you to
'blip' your indicators.
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BenB
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| posted on 4/3/07 at 12:53 PM |
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How about a more high tech solution? I'm discounting PICs here cos anythings possible with those bad boys...
Have a bar graph IC fed by the pulses from the indicator (you might need to daisy chain them to get a long enough gap before the buzzer goes off),
have an inverter on the input signal to trigger the reset of the IC (ie constantly reset when not indicating), have the "trigger" bar
signal go to a AND gate, the other input of which is the input from the indicators, the output also going to a buzzer....
Indicator signal ramps up the bar graph until such a time as the trigger signal is reached, this then prevents the bar graph going any higher....
Any others?!?!? 
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iank
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| posted on 4/3/07 at 12:53 PM |
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quote:
Originally posted by RazMan
Luckily I can turn down the Evodash's brightness at night so that is not a problem. The trailer buzzers would be a simple way of doing it I
suppose but they will always be on and that would get on my nerves.
The problem is compounded because my indicator are all leds so they don't make any noise whatsoever - at least a conventional system would
produce a 'tick tick' from the flasher unit.
If you are driving them with a relay moving it closer with give a tick-tock as the contact is pulled in.
Easiest is wiring a 555 as a buzzer circuit with some diodes and a small speaker.
[Edited on 4/3/07 by iank]
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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Paul M
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| posted on 4/3/07 at 01:02 PM |
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Try here,
all parts availabe from Maplin for less than £2. takes 10 mins to fit and works a treat.
steve richards
Go to car project, then tips section
[Edited on 4/3/07 by Paul M]
[Edited on 4/3/07 by Paul M]
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RazMan
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| posted on 4/3/07 at 01:13 PM |
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Yep that was my first thought
but as I said, the buzzer would sound all of the time - I am looking for a delay before the buzzer.
I suppose a sounder which just gives a loud CLICK would be ok (if there is such a thing)
[Edited on 4-3-07 by RazMan]
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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MkIndy7
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| posted on 4/3/07 at 01:27 PM |
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Presuming the pieces are still in there from the donors original column.. can the original self canceling device not be modified or altered to do the
job.
Ours is still in the boss but I think the problem lies in that unless its a really tight turn, you don't have to turn the wheel as far to get
around a corner and thus the original mechnisim isin't triggered because it doesn't think you've completed the turn.
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RazMan
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| posted on 4/3/07 at 01:39 PM |
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Thats the problem alright. It is a Sierra column with a Momo boss which incorporates the self cancelling tab but as you say, unless I am doing a tight
turn it doesn't cancel - it seems to have a mind of its own. Normally I would hear the flasher relay clicking or see the warning light, but in
daylight, an led just doesn't flash bright enough, hence the sounder idea.
[Edited on 4-3-07 by RazMan]
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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MkIndy7
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| posted on 4/3/07 at 01:51 PM |
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From when I remember looking at it.. maybe the Canceling tabs can be moved...
If the little white fingers that come off the back of the indicator stalks are at say 3 Oclock.. and the canceling tabs are at 11 and 1 Oclock.
If you moved the Canceling tabs to say 10 and 2 Oclock they'd already be closer to canceling the indicater so it would cancel after a shorter
turn of the wheel maybe.
Sounds good in theory, and would be simple and cheep!
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RazMan
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| posted on 4/3/07 at 01:59 PM |
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You might have something there. I have only one cancelling tab on the boss, so I positioned it centrally at 6 o'clock ..... which is of course
wrong for the 3 o'clock indicator stalk - it should be at 9 o'clock! That would explain why is seems a bit inconsistent.
That would mean that it SHOULD cancel after 180 degrees turn of the wheel.
[Edited on 4-3-07 by RazMan]
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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MkIndy7
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| posted on 4/3/07 at 02:09 PM |
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Ah yeh thats right.. I was thinking the Indicators were on oppsite sides of the steering wheel hence the 9 and 3 Oclock DOH! (haven't driven
since Friday  )
Hopefully that might help/cure it being erratic.
To make it knock off any sooner or after a shorter turn of the wheel I think you'd have to make the tab wider so it pushes on the leaver sooner
or to extend/widen the indicator finger.
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RazMan
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| posted on 4/3/07 at 02:22 PM |
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Actually you are right - I got it arse about face  I'm going to have a fiddle in the garage now - raining now so a drive is not likely.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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RazMan
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| posted on 4/3/07 at 04:03 PM |
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I just washed it yesterday!
Just sorted the cancelling thingy in the boss. I DID have it all wrong - I had the tab 180 degrees out so at least junction turns should cancel more
reliably now. I'm still going to install some kind of sounder though - even a noisy relay (just the coil connected so that it actuates)
connected to the warning light might be better.
[Edited on 4-3-07 by RazMan]
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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MkIndy7
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| posted on 4/3/07 at 04:27 PM |
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Wicked.. that should make it a bit better then.
Did there seem anyway to modify it to cancel sooner or for less of a turn?
As ultimately that would the best way to go and less annoying that a buzzer! (unless you could get the vibrating modure out of a mobile or something
and put that in the seat!)
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RazMan
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| posted on 4/3/07 at 05:04 PM |
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Now there's a thought!
The cancelling tab is a plastic moulding that pops over the column spindle. I don't think a modded tab would help in this case due to the
actuation method - the tab first goes past the switch (turning into a bend) and only nudges the switch on the way back (straightening up)
I wish I'd taken a pic of it now to describe it better.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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darrens
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| posted on 4/3/07 at 07:46 PM |
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why not an 'on' delay relay, i.e once the circuit has been made for the indicator the relay would not latch on until a preset time has
expired, this would then reset on turning the indicator off.
Plenty on RS, try this 300-5834 on the search bar in RS http://rswww.com
You can get allot cheaper if you avoid RS
The seatbelt warning sounder from Jags and the like wouldn't be too intrusive.
**** Aplogies, that timer is 24v DC, but there are plenty that are 12v DC *****
Cheers
[Edited on 4/3/07 by darrens]
[Edited on 4/3/07 by darrens]
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