Picaxe Control

slimplynth

slimplynth

Senior Member
I’ve just finished adding servos to the pedals of my car, So far so good the industrial type I used are operating well at 12V; they have no serial number but I just want to check the specs to lessen the chances of unexpected jittering. The servo’s now control the brakes and accelerator pedals.. I’d considered modifying the clutch but wanted to go slow and implement the system in stages...

I’ve worked out that my average stopping distance should improve by 50% (providing the car battery maintains it’s current voltage level).. fuel efficiency by using the picaxe cruise control is also expected to be a pleasant surprise.

Do I need to notify my insurance company of this change???

Thanks

Slim
 
Buzby

Buzby

Senior Member
Great stuff Slim, go for it !

And while your at it, why not add the 'self parking' that the newer cars have ?.

I'm thinking that an 08M and a few solenoid valves, ( you can get some good ones out of old washing machines ), would work the steering fine.

PS. If you decide to drive your car out of Blackburn, please warn forum members first.
 
P

pyrogaz

Member
Slim, your conversion wouldn't be complete without hacking one of the new "thought control" games and removing the pedals and steering wheel completely. Might want scatter a few capacitors around to catch unwanted spikes ;)
 
G

geoff07

Senior Member
You could add a wii steering wheel and let your (gender-neutral) spouse actually drive from the back seat.

p.s. Do you still have all those holes?
 
S

srnet

Senior Member
I already get circa 80mpg on the Motorway, so are you suggesting that if I stuff an 08M in the carb (or under the pedal - not sure which) my mpg will improve further ?
 
P

pilko

Senior Member
Use the 08M to improve fuel consumption

main:

symbol MPG = b0

readadc 1, MPG

MPG=MPG/2 'Improve fuel consumption by 100%

goto main

(works OK on simmulator)
 
Last edited:
Buzby

Buzby

Senior Member
MPG=MPG/2 'Improve fuel consumption by 100%
Click to expand...
If halving the MPG improves your fuel consumption then Nova Scotia must be in a different universe.

( It could be, our dog's a Nova Scotia Duck Tolling Retreiver, and she's normally in a world of her own. )
 
P

pilko

Senior Member
It works OK in simmulator.but I don't understand why I am getting poor mileage.
It's a good thing our petrol is cheaper than yours.
 
I

inglewoodpete

Senior Member
You're allowed to add seat covers, aren't you? A PICAXE, especially a small one, would be roughly the same in their eyes, wouldn't it?
 
Last edited:
D

Dippy

Moderator
A PICAXE is probably safer controlling a vehicle than Slymplynth.
Have you seen his driving? Awful. I phoned his insurance company and they said they would prefer a PICAXE (mounted on veroboard sitting on a sheet of aluminium) driving his car.

I think he should add a 0.0001mW tenpenny laser which will blind people even if you bounce it off the moon.
 
slimplynth

slimplynth

Senior Member
Can someone please tell me where I've gone wrong in the code below.. It was ok on the motorway but for some reason doing the side streets seems to be causing problems... Sorry I forgot to mention earlier that I'm using a 14X2.. using the dremel mod from a 20X2.. should I be concerned with grounding issues? I've tied unused inputs to the car's +12V, via a reddish looking wire I found under the dash board.

Thanks for the Laser idea Dippy, Those look like they'll make excellent fog lights to use on only slightly misty mornings.


Code: 
...
servo 1 , 1
servo 1 , 2
servo 1 , 3
servo 1 , 4
servo 1 , 5
servo 1 , 6
servo 1 , 7
servo 1 , 8
servo 1 , 9
servo 1 , 10
servo 1 , 11
servo 1 , 12
servo 1 , 13
servo 1 , 14
servo 1 , 15
servo 1 , 16
servo 1 , 17
servo 1 , 18
servo 1 , 19
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servo 1 , 300
 
J

Jamster

Senior Member
Looks fine.
Probably a hardware issue, can you post a schematic and datasheets of your components?

inglewoodpete said:
You're allowed to add seat covers, aren't you? A PICAXE, especially a small one, would be roughtly the same in their eyes, wouldn't it?
Click to expand...
I'm sure they wouldnt mind if you made the circuit into a seat cover. ;)

Also, maybe if you had the right contacts, you could replace the windscreen with a large Oled display and create a simple program to replace the boring city view from a standard window into a stunning view of the himilayas. And maybe you could add PS3 functionalaty and be able to play games like blur or blackops from the wii remote that doubles as the steering wheel...

I was planning on asking for help with my dads PICAXE pacemaker with an embedded 4D systems 3.2inch touchscreen LCD and blutooth control, but I might put that on hold while we have a free NHS one ;).

Jamster
 
Last edited:
J

John West

Senior Member
I applaud you on your bold thinking, slimplynth, but I think the car companies are already doing something similar. However, from what I hear in the news, you might be able to do it better.

But just in case, I'd suggest you add an accelerometer and a picaxe and a solenoid or two that will release a large rock (on the end of a well secured rope) off the back of the boot if the accelerometer reading goes up drastically.

Just in case.

You could call the subroutine - "Oops." I don't believe that word has been assigned as a picaxe instruction as yet so it's still available - and oh so descriptive.

P.S. You might save a bit on the power supply by simply using a resistor divider to drop the vehicle voltage down to picaxe levels. After all, what could be more stable than a car battery? And Ohm's Law hasn't been proven wrong yet. :D

Kids, don't try this at home.... It could ruin the carpet. Especially on or about April 1st.
 
J

John West

Senior Member
slimplynth said:
Can someone please tell me where I've gone wrong in the code below.. It was ok on the motorway but for some reason doing the side streets seems to be causing problems... Sorry I forgot to mention earlier that I'm using a 14X2.. using the dremel mod from a 20X2.. should I be concerned with grounding issues? I've tied unused inputs to the car's +12V, via a reddish looking wire I found under the dash board.

Thanks for the Laser idea Dippy, Those look like they'll make excellent fog lights to use on only slightly misty mornings.


Code: 
...
servo 1 , 1
servo 1 , 2
servo 1 , 3
servo 1 , 4
servo 1 , 5
servo 1 , 6
servo 1 , 7
servo 1 , 8
servo 1 , 9
servo 1 , 10
servo 1 , 11
servo 1 , 12
servo 1 , 13
servo 1 , 14
servo 1 , 15
servo 1 , 16
servo 1 , 17
servo 1 , 18
servo 1 , 19
servo 1 , 20
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servo 1 , 105
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servo 1 , 112
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servo 1 , 117
servo 1 , 118
servo 1 , 119
servo 1 , 120
servo 1 , 121
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servo 1 , 204
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servo 1 , 243
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servo 1 , 300
Click to expand...
I'm far from a code expert, but it looks like there's enough code there to do the job. The problem might be caused by too much capacitive filtration in the power supply. I'd take a good screwdriver and check that out first.
 
D

Dippy

Moderator
IP... haha very good. I didn't read my own drivel.

It's funny with April Fool's stuff.

When I were a lad I was shown a 'Newspaper' that was a tradepaper for the mobile/cellular phone market.
Panasonic had placed Press Release about a handset phone with a camera built-in.
When every dealer in Europe asked for the phone Panasonic (in the May publication) said it was just an April Fool's day advert and that it wasn't possible.
A cunning bit of Market Research and the rest is history....
 
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