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'[EE]: Accelerometer brakelight (was Modulating a h'
2001\07\03@044524 by Short, Evan

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All this talk of increasing visibility has suddenly become of more interest
to me, given that I'm recovering from an argument with a Land Rover which
turned across my path (Oh, I didn't see you) in traffic. Turns out that my
motorcyle and I weigh a lot less than a Land Rover. Only a mind hand
fracture, thanks to a good helmet, good jacket, leather pants etc... Getting
to the point, though, I'll be looking into a headlight modulator, evidently
having your highbeams on during the day doesn't cut it with Italian drivers
- I don't know if they're legal in Italy but I think I'd rather risk the
ticket from the usually absent local police than another encounter with a
Land Rover.
Ironically, I had already modified my bike to make me more visible from
behind - I built a brakelight which activates a row of high intensity LEDs -
more LEDs for heavier deceleration. I've always thought that this was
important on a motorbike, as you can be decelerating quite heavily from
engine braking alone before you touch the brakes. Using an accelerometer,
the drivers behind get a warning before your main brake light comes on. I
used a PIC, naturally, a 12C series reading the digital output of an Analog
Devices surface mount accelerometer and controlling the lights.
I'd be interested in knowing if anyone else has done a similar project.

Keep the rubber side down,

Evan.

==========<O>==========
Evan Short
Ingegnere Elettronico - FERRARI  S.p.A. GES
v. Ascari 55/57   41053 Maranello (MO)   ITALY
Tel. +39 (0536) 949.616   FAX +39 (0536) 949.377
spam_OUTeshortTakeThisOuTspamferrari.it

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2001\07\03@051300 by Martin Hill

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Hi Evan,
I have done a performance measuring meter using the same accelerometers.  I assume you use the ADXL202.  I used the two CCP inputs to get the two axis readings.  I'm working on a version for motorbikes as well.  You can see the meters in the products section at http://www.race-technology.com  Email me off list if you would like any further information.

Martin

>>> .....eshortKILLspamspam@spam@FERRARI.IT 07/03/01 09:44AM >>>
All this talk of increasing visibility has suddenly become of more interest
to me, given that I'm recovering from an argument with a Land Rover which
turned across my path (Oh, I didn't see you) in traffic. Turns out that my
motorcyle and I weigh a lot less than a Land Rover. Only a mind hand
fracture, thanks to a good helmet, good jacket, leather pants etc... Getting
to the point, though, I'll be looking into a headlight modulator, evidently
having your highbeams on during the day doesn't cut it with Italian drivers
- I don't know if they're legal in Italy but I think I'd rather risk the
ticket from the usually absent local police than another encounter with a
Land Rover.
Ironically, I had already modified my bike to make me more visible from
behind - I built a brakelight which activates a row of high intensity LEDs -
more LEDs for heavier deceleration. I've always thought that this was
important on a motorbike, as you can be decelerating quite heavily from
engine braking alone before you touch the brakes. Using an accelerometer,
the drivers behind get a warning before your main brake light comes on. I
used a PIC, naturally, a 12C series reading the digital output of an Analog
Devices surface mount accelerometer and controlling the lights.
I'd be interested in knowing if anyone else has done a similar project.

Keep the rubber side down,

Evan.

==========<O>==========
Evan Short
Ingegnere Elettronico - FERRARI  S.p.A. GES
v. Ascari 55/57   41053 Maranello (MO)   ITALY
Tel. +39 (0536) 949.616   FAX +39 (0536) 949.377
eshortspamKILLspamferrari.it

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2001\07\03@073104 by Alexandre Domingos F. Souza

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>to me, given that I'm recovering from an argument with a Land Rover which
>turned across my path (Oh, I didn't see you) in traffic. Turns out that my

       hihihi

>engine braking alone before you touch the brakes. Using an accelerometer,
>the drivers behind get a warning before your main brake light comes on. I
>used a PIC, naturally, a 12C series reading the digital output of an Analog
>Devices surface mount accelerometer and controlling the lights.
>I'd be interested in knowing if anyone else has done a similar project.

       Interesting, I'd like to take a look on it..

>Ingegnere Elettronico - FERRARI  S.p.A. GES

       WHAT???? You work on Ferrari and has a MOTORBIKE???? NAAAAAAAAAAHHHHHHH!!! :~(


---8<---Corte aqui---8<----

Alexandre Souza
.....taitoKILLspamspam.....terra.com.br
http://planeta.terra.com.br/lazer/pinball/

---8<---Corte aqui---8<----

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2001\07\03@101127 by James Newton. Admin 3

face picon face
That is a really good point about breaking without the breaks and if I were
still... err... young enough? to ride, I would be begging for your design so
I could build one and were I not an embedded engineer, I would want to buy
one. You should consider producing and selling that unit.

One other comment, for any young riders, based on personal experience: What
Evan says about good helmet and leather can not be overstressed. Denim,
cotton, etc...  are like tissue paper when they rub on the road. Leather can
prevent road rash. Wearing a car instead of riding a bike can prevent lots
of other injuries.

James Newton, PICList Admin #3
EraseMEjamesnewtonspam_OUTspamTakeThisOuTpiclist.com
1-619-652-0593 phone
http://www.piclist.com

{Original Message removed}


'[EE]: Accelerometer brakelight (was Modulating a h'
2001\08\03@153637 by Jeff DeMaagd
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----- Original Message -----
From: Short, Evan <eshortspamspam_OUTFERRARI.IT>
Subject: [EE]: Accelerometer brakelight (was Modulating a headlight)


> Ironically, I had already modified my bike to make me more visible from
> behind - I built a brakelight which activates a row of high intensity
LEDs -
> more LEDs for heavier deceleration. I've always thought that this was
> important on a motorbike, as you can be decelerating quite heavily from
> engine braking alone before you touch the brakes. Using an accelerometer,
> the drivers behind get a warning before your main brake light comes on. I
> used a PIC, naturally, a 12C series reading the digital output of an
Analog
> Devices surface mount accelerometer and controlling the lights.
> I'd be interested in knowing if anyone else has done a similar project.

An old classmate of mine built such a similar product, but rather than show
you the acceleration it flashed.  He didn't say what was involved in
designing it.  I haven't heard from him since last December though.

Jeff

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2001\08\03@163845 by Don Hyde

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I am working on a project using one of Analog Devices micromachined
accelerometers, and have found it very easy to use.  Its output can be
connected directly to a PIC analog input, so you could easily make a circuit
with programmable acceleration detection.

The +-2G parts are only a few dollars as they are made in large quantities
for airbag sensors.

> {Original Message removed}

2001\08\03@232402 by Mike Kendall

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Hi Jeff,
   I have not completed the  Harley high intensity LED project yet.  I'd
sure like to exchange emails with you offline from PIClistserv.  Your
project seems light years ahead (no pun intended :-)  than mine.  I would
like to build one similiar for this guy as he uses it as a family/weekend
cruiser like so many others.  What about the severe vibration, is the
accelerometer portion immune to this?
Regards,
Mike at KILLspamke6cvhKILLspamspamthe-i.net

{Original Message removed}

2001\08\05@164122 by Mike Kendall

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Hi,
   I know a certified mechanic who once told me that they  used a regular
tun  signal flasher module on 3rd brakelights to flash them for the fleet of
vehicles belonging  to the city and were being maintained at his garage.
   I would like to build this circuit that you described with the Analog
devices surface mount  accelerometer.  My first concern is the vibration of
the Harley setting it off.  Do you think the vibration would be an issue?  I
saw some 20,000mCd LED's on ebay but they wanted 2.99 each.
Regards,
Mike
{Original Message removed}

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