automated 4-stroke kill switch using PIC


Closed Thread
Results 1 to 9 of 9

Hybrid View

  1. #1
    Join Date
    Jan 2009
    Posts
    7


    Did you find this post helpful? Yes | No

    Default

    The peak voltage can get high a feed resistor and a zener diode will do the trick I would think.

  2. #2
    Join Date
    Sep 2005
    Location
    Campbell, CA
    Posts
    1,107


    Did you find this post helpful? Yes | No

    Default

    Most kill switches are connected to a separate winding on the coil, (or internally to the circuit), so the voltage on the kill switch contacts is not nearly as high as the normal plug voltage.

    It would be good to know what you really have before you start.
    Charles Linquist

  3. #3
    Join Date
    Aug 2006
    Location
    Look, behind you.
    Posts
    2,818


    Did you find this post helpful? Yes | No

    Default Not 30,000 volts

    Small magneto equipped engines kill switches work by shorting the<b> primary circuit</b>, and the voltage encountered will be several hundred volts, with enough amperage to give you a good hard shock, , I doubt if the voltage is high enough to have to worry about "flashover" of the relay contacts, snubber capacitor may be required.
    If you do not believe in MAGIC, Consider how currency has value simply by printing it, and is then traded for real assets.
    .
    Gold is the money of kings, silver is the money of gentlemen, barter is the money of peasants - but debt is the money of slaves
    .
    There simply is no "Happy Spam" If you do it you will disappear from this forum.

  4. #4
    Join Date
    May 2004
    Location
    NW France
    Posts
    3,648


    Did you find this post helpful? Yes | No

    Wink

    Hi, Mitch

    generally, the Kill switch of a CDI shorts the HV Winding ( 250-300 AC Volts ) without any fear ...

    Now electronic ignition modules may have a special wire for that ...

    I believe RELEASING the relay supply to stop would be a much safer practice ... but it's you to decide.

    Alain
    ************************************************** ***********************
    Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
    ************************************************** ***********************
    IF there is the word "Problem" in your question ...
    certainly the answer is " RTFM " or " RTFDataSheet " !!!
    *****************************************

  5. #5
    Join Date
    Aug 2006
    Location
    Look, behind you.
    Posts
    2,818


    Did you find this post helpful? Yes | No

    Default

    Quote Originally Posted by Acetronics View Post
    Hi, Mitch

    generally, the Kill switch of a CDI shorts the HV Winding ( 250-300 AC Volts ) without any fear ...


    Alain
    Well Alain, at least we agree on the voltage range . . . Kettering (points type) ignition shorts the primary winding . . . CDI . . . I defer to Alain's experience.
    If you do not believe in MAGIC, Consider how currency has value simply by printing it, and is then traded for real assets.
    .
    Gold is the money of kings, silver is the money of gentlemen, barter is the money of peasants - but debt is the money of slaves
    .
    There simply is no "Happy Spam" If you do it you will disappear from this forum.

  6. #6
    Join Date
    May 2004
    Location
    NW France
    Posts
    3,648


    Did you find this post helpful? Yes | No

    Talking

    Hi, Joe

    YES, the HV winding !!! which is a special winding in the "generator", just dedicated to produce the "400vDC" to charge the CDI capacitor ...

    Want to see ( and hear her roaring ... ) my Kawasaki KH500 tri-cylinder ???

    Alain
    ************************************************** ***********************
    Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
    ************************************************** ***********************
    IF there is the word "Problem" in your question ...
    certainly the answer is " RTFM " or " RTFDataSheet " !!!
    *****************************************

  7. #7
    Join Date
    Aug 2006
    Location
    Look, behind you.
    Posts
    2,818


    Did you find this post helpful? Yes | No

    Default

    Quote Originally Posted by Acetronics View Post
    Hi, Joe

    YES, the HV winding !!! which is a special winding in the "generator", just dedicated to produce the "400vDC" to charge the CDI capacitor ...

    Want to see ( and hear her roaring ... ) my Kawasaki KH500 tri-cylinder ???

    Alain
    NO No I believe you, but are we to assume it is a late model motorcycle? I think we should do as we did and present all possibilities since we do not know what he is working on. BTW 400v is high voltage compared to 5v, compared to 30,000 volts I would call it primary voltage. Anyway what matters is that we are helpful to the OP. Oh BTW, nice bike!
    If you do not believe in MAGIC, Consider how currency has value simply by printing it, and is then traded for real assets.
    .
    Gold is the money of kings, silver is the money of gentlemen, barter is the money of peasants - but debt is the money of slaves
    .
    There simply is no "Happy Spam" If you do it you will disappear from this forum.

Similar Threads

  1. Replies: 24
    Last Post: - 2nd October 2017, 11:35
  2. PIC10F200 Automated IR Light Switch
    By Bruce in forum Code Examples
    Replies: 7
    Last Post: - 3rd May 2007, 11:40
  3. Replies: 2
    Last Post: - 10th June 2005, 02:34
  4. Serial Pic to Pic using HSER
    By Chadhammer in forum mel PIC BASIC Pro
    Replies: 5
    Last Post: - 11th March 2005, 23:14
  5. Battery Backup with PIC controlling switch
    By Dwayne in forum Schematics
    Replies: 1
    Last Post: - 27th December 2003, 13:16

Members who have read this thread : 0

You do not have permission to view the list of names.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts