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Thread: problems with timeinglight,stroboskopeffect

  1. #1

    problems with timeinglight,stroboskopeffect

    Hi all
    i am tuning my bikewheel with the help of an Led,but if i change the baseresistance with a Pot there is no change of the switching,wich means the marks are allways at the same place.It should switch in between two magnets but it switches allways when the magnet is alignet with the coilcore.I have changed the coildistance from 2 up to 10mm in 1mm steps,no change.I have hooked up the Led with 300 ohm resistor on Anode to Collector and Cathode to Emitter.
    My wheel has 46cm diameter and 17 scalar north magnets,the coil is 18awg 8filliar with 7 MJL.The batteries are 22ah for Lawnmover with Calciumtechnology.Baseresistors are 470 Ohm and the preresistor is 5.6 ohm than it draws about 1 Amp.
    Then i have changed to 300 ohm and took a Pot but there is no change of the switching angle.
    Does somebody know what i made wrong.I have capacitor discharge with SCR, Zenerdiode and 60000uf and it dumps from 25v to15v every 1.5 sec.
    Here are videos where they explain how to adjust.
    https://www.youtube.com/watch?v=PW_W...M2AbwOBaXIqDbw
    https://www.youtube.com/watch?v=Iyfxu6NbqNU
    Thanks
    Last edited by forelle; 12-20-2013 at 06:07 PM.

  2. #2
    Quote Originally Posted by forelle View Post
    Hi all
    i am tuning my bikewheel with the help of an Led,but if i change the baseresistance with a Pot there is no change of the switching,wich means the marks are allways at the same place.It should switch in between two magnets but it switches allways when the magnet is alignet with the coilcore.I have changed the coildistance from 2 up to 10mm in 1mm steps,no change.I have hooked up the Led with 300 ohm resistor on Anode to Collector and Cathode to Emitter.
    My wheel has 46cm diameter and 17 scalar north magnets,the coil is 18awg 8filliar with 7 MJL.The batteries are 22ah for Lawnmover with Calciumtechnology.Baseresistors are 470 Ohm and the preresistor is 5.6 ohm than it draws about 1 Amp.
    Then i have changed to 300 ohm and took a Pot but there is no change of the switching angle.
    Does somebody know what i made wrong.I have capacitor discharge with SCR, Zenerdiode and 60000uf and it dumps from 25v to15v every 1.5 sec.
    Here are videos where they explain how to adjust.
    https://www.youtube.com/watch?v=PW_W...M2AbwOBaXIqDbw
    https://www.youtube.com/watch?v=Iyfxu6NbqNU
    Thanks

    Hello to all
    i guess everybody is still thinking about what i asked,because all who have an SSG have to know how the timing/switching between the magnets is reached,and that is only measurable with the strobolight i think.Please take me to the same level of understanding than the rest of you guys.
    Thanks

  3. #3
    Hi onesmore
    I have watched the Video from the 6 coiler again and he changed the connection of the Led and he said first 'this is the charging and this is the other place'
    the other place means running,or what else?If ichange the Connection then the Led dont light up so i think i have hooked it in the wrong place,but where shall i hook it.
    He has made one red point between the magnets,for what is this mark?
    Thanks

  4. #4
    Senior Member John_Koorn's Avatar
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    forelle, if connected one way the LED will show the time the transistor is on, which is when the coil is energised (or charging). It will always switch on at the centre of the coil and will switch off after top dead centre. The time at which the transistor switches off is adjusted by the pot (base resistor).

    If you connect the LED the other way it will show the coil de-energising (or discharging).

    If your LED is not working both ways try another LED/ I had some that would only work one way - which is why I prefer the superbright blue LEDs. For some reason they seem to work best.

    John K.

  5. #5
    Thanks for the explaination from the Led.
    You say it allways switches on the center of the coil and switches off after top dead center,thats what is "normal",but how do you make it that it switches in between 2 Magnets,like you explain in your video,because i thought when i change the baseresistance the switchingangle should also change so far that it is switched with the scalar south,or did i understand something wrong?
    Thank you very much

  6. #6
    Senior Member John_Koorn's Avatar
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    forelle,

    changing the base resistance will determine when the transistor switches off. You should be able to see the angle that the transistor switches off with your timing LED.

    John K.

  7. #7
    forelle,
    "I have hooked up the Led with 300 ohm resistor on Anode to Collector and Cathode to Emitter."
    The LED should be across the coil not across the transistor!
    Martin B

  8. #8
    Quote Originally Posted by Martin B View Post
    forelle,
    "I have hooked up the Led with 300 ohm resistor on Anode to Collector and Cathode to Emitter."
    The LED should be across the coil not across the transistor!
    Martin B
    Thanks that was my mistake,now its clear.

  9. #9
    Senior Member Yaro1776's Avatar
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    Aug 2012
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    Can someone clarify with more specific detail the connection "across the coil". Where are the LED wires placed?

    Yaro

  10. #10
    I make my light with two LED's one red, one blue. Wire them in opposite polarity of each other so that one will catch the forward voltage and one the backward. i prefer the little square kind that are high power and use at least 300ohm resistance but this will depend on what led's you use.

    Connect across the coil. What this means is at each end of the coil so your tops are connected where,, the primary POS,, the Bottoms are where,, to the transistor collector BEFORE the diode.

    think of it this way, the coil has energy passing in two directions through it. The diode only lights up in one direction so you want to be connected "across" the coil to detect the voltage through the coil.

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