1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Support Thread for Speed Lock Override sold in the PC Shop

Discussion in 'Gen 3 Prius Accessories and Modifications' started by cproaudio, Oct 8, 2011.

?

Do you want to bypass the speed lock?

  1. Yes I want to bypass that damn speed lock.

    659 vote(s)
    87.5%

  2. No, It'll be worst than texting while driving.

    9 vote(s)
    1.2%

  3. No, but I still wanna see how it's done.

    78 vote(s)
    10.4%

  4. I don't see a reason listed so I'll list mine own.

    7 vote(s)
    0.9%
Page 11 of 12
  1. cproaudio

    cproaudio Speedlock Overrider

    Joined:
    Jul 7, 2010
    2,401
    760
    0
    Location:
    CA
    Vehicle:
    2010 Prius
    Model:
    V
    No I mean use 4.7uf cap for capacitor. Use 1M ohm resistor for R2. You can also use 33k ohm series with 1M ohm pot to make it adjustable between 0-6km/h. This is what I'm using for the new bypass.
     
    #201 cproaudio, Sep 3, 2014
    WE0H likes this.
  2. MSM182

    MSM182 New Member

    Joined:
    Aug 20, 2014
    11
    0
    0
    Location:
    Los Angeles, CA
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    Thanks for helping me and please excuse me for my near zero knowledge in electronics.

    I went back to your scheme :
    [​IMG]
    You said "You can also use 33k ohm series with 1M ohm pot"
    Do you mean put both in-line?
     
    #202 MSM182, Sep 4, 2014
  3. cproaudio

    cproaudio Speedlock Overrider

    Joined:
    Jul 7, 2010
    2,401
    760
    0
    Location:
    CA
    Vehicle:
    2010 Prius
    Model:
    V
    Use 1M ohm pot instead of 100k pot to achieve near 0km/h. You can also add another resistor higher than 30K ohm in series of the pot to limit the higher speed.
     
    #203 cproaudio, Sep 4, 2014
  4. MSM182

    MSM182 New Member

    Joined:
    Aug 20, 2014
    11
    0
    0
    Location:
    Los Angeles, CA
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    I got it. I'll try and see
     
    #204 MSM182, Sep 4, 2014
  5. MSM182

    MSM182 New Member

    Joined:
    Aug 20, 2014
    11
    0
    0
    Location:
    Los Angeles, CA
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    #205 MSM182, Sep 11, 2014
  6. cproaudio

    cproaudio Speedlock Overrider

    Joined:
    Jul 7, 2010
    2,401
    760
    0
    Location:
    CA
    Vehicle:
    2010 Prius
    Model:
    V
    Pots are only needed if you want to adjust the speed. If you want 0mph then just use a 1M ohm resistor with 4.7uf cap. Please return that hedious pot. You can use this 100k pot with 47uf capacitor instead of 4.7uf to achieve the same result.
     
    #206 cproaudio, Sep 11, 2014
  7. MSM182

    MSM182 New Member

    Joined:
    Aug 20, 2014
    11
    0
    0
    Location:
    Los Angeles, CA
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    #207 MSM182, Sep 12, 2014
  8. cproaudio

    cproaudio Speedlock Overrider

    Joined:
    Jul 7, 2010
    2,401
    760
    0
    Location:
    CA
    Vehicle:
    2010 Prius
    Model:
    V
    R1 and R2 are for resistors only. Changing R2 and Capacitor combination values changes the output of the 555 timer. You can use this calculator Astable 555 Square Wave Calculator to calculate the frequency. It also shows you how to properly use a 555 timer. The parts you linked are correct. However, 1/8w resistor is enough. Radioshack does return opened package. You just need to make the item resellable.
     
    #208 cproaudio, Sep 12, 2014
  9. MSM182

    MSM182 New Member

    Joined:
    Aug 20, 2014
    11
    0
    0
    Location:
    Los Angeles, CA
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    You said :
    1. R1 and R2 are for resistors only.
    2. Pots are only needed if you want to adjust the speed ( I don't need to change the speed. All I need is a 0)

    After playing a little bit with 555 timer calculator
    [​IMG]
    where what I'm thinking of:
    1. Replacing R1 and R2 with 1M ohm resistor
    2. Replacing the 4.7uf capacitor with 1000uf Like this

    How about that? I want to keep things as simple as i can because I need to build the same video input for 2 of my friends.
     
    #209 MSM182, Sep 13, 2014
  10. cproaudio

    cproaudio Speedlock Overrider

    Joined:
    Jul 7, 2010
    2,401
    760
    0
    Location:
    CA
    Vehicle:
    2010 Prius
    Model:
    V
    Pots are adjustable resistors. Keep it simple. If you don't want any adjustments, use a single value resistor. The values you've used will not work. You need to keep the duty cycle percentage as close to 50% as possible. This gives you the same amount of highs as lows. High and low time can not exceed 90 seconds. If it does, the nav will switch to GPS satellite speed instead of VSS speed. When that happens, turning the bypass off and on will not override the speedlock.
    I would suggest no more than 10 seconds of high and low time on the calculator. To keep it even more simpler, use 1K ohm for R1, 1M ohm for R2, 4.7uf for C and be done. If you want a longer high/low time, use up to 3M for R2. Nothing higher than that.
     
    #210 cproaudio, Sep 13, 2014
  11. MSM182

    MSM182 New Member

    Joined:
    Aug 20, 2014
    11
    0
    0
    Location:
    Los Angeles, CA
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    My head unit doesn't have GPS. So no needs to worry about the GPS signal.
    As I said before: I have zero knowledge about electronic parts. So I don't know what the use of of high/low time (No need to explain).
    I'll go with R1 1K ohm and R2 2M ohm and see the result.
     
    #211 MSM182, Sep 13, 2014
  12. MSM182

    MSM182 New Member

    Joined:
    Aug 20, 2014
    11
    0
    0
    Location:
    Los Angeles, CA
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    It works. Finally I got the video working while driving
    I can't thank you enough for your guidance
     
    #212 MSM182, Sep 21, 2014
  13. cproaudio

    cproaudio Speedlock Overrider

    Joined:
    Jul 7, 2010
    2,401
    760
    0
    Location:
    CA
    Vehicle:
    2010 Prius
    Model:
    V
    #213 cproaudio, Oct 1, 2014
  14. Astrat

    Astrat New Member

    Joined:
    Oct 3, 2014
    1
    3
    0
    Location:
    Long Island, NY
    Vehicle:
    2012 Prius
    Model:
    Three
    Here's the poor man's solution to the navigation lock problem.
    • The circuit in the picture is from e-Bay for under $5 (search for 555 module). I've used and oscilloscope to set the frequency to 3.8 Hz and roughly 50% duty cycle.
    • The switch is a single pole double throw break before make. The rest are wires and connectors.
    • I've connected the red and black wire (circuit power in) to the back of the cigarette lighter contacts after I've improvised some prongs.
    • After cutting the purple speed signal wire I've connected (soldered) the green wire to the console side and the orange to the other cut end.
    Summary:
    • Circuit: $4,
    • Switch: free (I had it)
    • Wires: free (I had them)
    • Connectors: free (I had them)
    • Tools: free (I had them)
    • Time: about 2.5 hours including the preparation and installation
    • Skill: priceless :)
    I provide this information for those with enough technical skill to do it for cheap. For the rest I suggest buying the pre-made kits that are available from other sources.

    Many thanks to cproaudio for doing all the research and providing the fundamentals and to everyone else that contributed to a solution.

    DSCF4905.JPG
     
    #214 Astrat, Oct 3, 2014
    tgtech, DoubleDAZ and WE0H like this.
  15. dsmithut

    dsmithut Junior Member

    Joined:
    Oct 4, 2014
    10
    4
    0
    Location:
    Salt Lake City, Utah
    Vehicle:
    2014 Prius
    Model:
    Three
    I received the TSHRCA+SLO1 in the mail this week. I will try to document the install in my 2014 Prius when I do it and post.


    iPhone ?
     
    #215 dsmithut, Oct 18, 2014
    WE0H likes this.
  16. Dr.E777

    Dr.E777 Junior Member

    Joined:
    Oct 6, 2014
    10
    3
    0
    Location:
    Los Angeles, CA
    Vehicle:
    2014 Prius
    Model:
    Five
    Just installed. Works like a charm. The colors of the wires are different from the instructions. Can anyone tell me what the orange and red wires are for? I only used the purple and blue ones.
     
    #216 Dr.E777, Oct 18, 2014
  17. cproaudio

    cproaudio Speedlock Overrider

    Joined:
    Jul 7, 2010
    2,401
    760
    0
    Location:
    CA
    Vehicle:
    2010 Prius
    Model:
    V
    Those are for switching the brake wires. If your nav unit plays DVD or if you've installed a video input jack, you'll need to hook up the red and orange wires in order to view videos while driving. Can you please tell me what colors are different?
     
    #217 cproaudio, Oct 18, 2014
  18. Dr.E777

    Dr.E777 Junior Member

    Joined:
    Oct 6, 2014
    10
    3
    0
    Location:
    Los Angeles, CA
    Vehicle:
    2014 Prius
    Model:
    Five
    Mine came with a purple wire and a blue wire. All of the instructions show purple and a purple with a black stripe. I spliced the purple to the head unit side of the VSS wire and the blue to the harness side. I taped over the red and orange wires and did not attach them. I assume that is correct?
     
    #218 Dr.E777, Oct 18, 2014
  19. cproaudio

    cproaudio Speedlock Overrider

    Joined:
    Jul 7, 2010
    2,401
    760
    0
    Location:
    CA
    Vehicle:
    2010 Prius
    Model:
    V
    The purple and purple/black stripe were the old color codes for the V1. The new diagram with color codes can be found at the bottom of the first post.
    [​IMG]
     
    #219 cproaudio, Oct 18, 2014
    Last edited: Oct 18, 2014
  20. Dr.E777

    Dr.E777 Junior Member

    Joined:
    Oct 6, 2014
    10
    3
    0
    Location:
    Los Angeles, CA
    Vehicle:
    2014 Prius
    Model:
    Five
    Thanks for posting the diagram, wish I had seen it before.
     
    #220 Dr.E777, Oct 18, 2014
(You must log in or sign up to post here.)
Page 11 of 12