Hi
I will part my recommendation in two parts:
First the electronic design.
Second some finger rules of the real world(include some nice joke).
First
I agree with Ted an want to add some info:
1. In the input of the power supply you must use lc filter,
and the protection zener(that called transzorb) it must be little big
then the max voltage continus of your alternator (12v baterry need ~15
carge voltage so recommended transorb of 16v otherwise it will burn).
2. dc-dc converter is most recommended for power save.
3. Some time the motorycle have some power fail like
when use starter,etc.. so you will get a power fail some time of sec or more
so you need inside the system on the 5v a good capacitor to backup
you from that power-fail . You can use a great cap that
called
SUPERCAP is a small special cap of 5v and 0.5-1
F !!!
other options is to use a baterry + additinal power fail chip that will
backup your system in cause of power fail.
4. I hope that you known your motorycle and the system is 12v!!!
some kind of motorycle have small baterry of 6-8.6v !!! and not 12v
It will nice if you give us some info of the motorycle like vedor,cc,baterry(volt/amp).
After we talk of the power supply let go to other parts of the design
(I'm not sure that the only problem is the power supply)
Tell us some of the i/o interfaces and also whit type of rallay you use?
1. All your
io must be protected from spike
recommended rc filter and also add zener after the resistor for protect
the system from over-voltage.
You can't solve all the noise in the io only the rc filter!
recomended to add digital filter in program for example
if you wan't arm the alarm(block the motorbyke) sample the signal for
20sec(exapmle) for stability (that protect you from long spikes)
before lock it.
2. Recommended to use a power-fail reset chip and not rc on the reset of
the uc in case of big-power fail or slower power up it can go to :?: :x
3. Is not recommended to use not a normal relay
use special pulse relay after you move the connetions he continue
to stay in that position without any current
(in case of the system crash on ride it not disconnected the motorbike)
3.1 is recommend also to store in ee mem the status of drive
(after a power-fail when the uc wake up to have know is he is in ride mode
to not disconnect your relay in functions of the digitals program filters).
4. Recommended to use extend temp comp like ind temp
(commercial components work from 0-50c not good to non-dor system)
Water resistant.
Chemicals resistant.
Vibration resistant.(comp on dip socket will get out so solder them).
I think that i talk about all (sorry if i forgot something).
:!: :!: :!: :!: :!:
Now the most fun part the
second part
safety :? finger rules 8O and joke :wink:
A day ago a try write all thats(it take to me ~1hour) but when i send the mail it lost
:x :x :x so today i write it again and bakup it!!!!
A motorcyclist to motorcyclist some little rules:
1. If you are not in hospital start with the nurses
or
you drink a cup of coffe with god :? or
you are with your new boss :twisted: :x
So that good because you read that usefull info 8O :!: :wink:
2. I hope that you are a good designer so your life is in your hand. :?
3. You have more courage than mind. 8O
4. Some little info 8O of the real world :
The insurance comp don't like to pay :x for most accidents 8O !
So in case of accident is not important if that your mistake or not
if they will find a non apruvved aditional part to your motorbike
you will the quilty :!: the insurance comp will say to you :x ,
and you find 8O yourself pay for the mistake of other. :?
5. if you see :twisted: in the side of the road wait for tremps
don't stop ,continue to drive but don't look to himself a lot of time if
you don't want to enter on a tree. :wink:
6. Not good idea to be a pilot on air . :?
Aproval test for system (how you know is not a indoor system)
that appruve system have:
1. Vibration test: take a shirt put the system inside and put
inside the dryer machine now for road motobike , now run the
macine with hot air for
half hour for road motobike :?
for others&harlly-davisons use 1.5 hour :wink:
now open the system see in all the parts are fixxed. 8O
2. Water& chemicals test: put the system in the wash macine
full prog + soap. :wink:
Now see if the color not down.
2.1 Water test: put the system in aquarium power it
if the fish jump out so you have now two problem. :?
3. Temp test:
put in oven in 75c for 2 hours the system when work
see 8O if somting is cook :?
put in frizzer for night in the morning powered the system on
see if it not shorted for the low temp 8O
4. fuel&fire test: close the door and windows open the gas wait half
hour power the system . You never know if a problem was. 8O
(child don't do it at home!!!)
5. Last test road test: find a "fried" that you don't want see him
let him take a tour on the motobike.
if you will not sem him so you solve one problem 8O
and you have two probems no system&motobike :?
if you see him you have only one problem him! 8O
In the last row i add you info of my two ridder friendsfrom loony-toons
that was on the road
one of them have a lot of experience on design additional parts to road
machine and the other still drive this will get you all the picture
Please post us what going?
Best regards Gabby.
(to admin/mod sorry but life is not joke but it ussefull tool to open
his eys before it going sleep between the lines)