Motorbicycling 6V electrical system?

Discussion in 'Motorized Bicycle General Discussion' started by velardejose, Sep 17, 2008.

  1. velardejose

    velardejose New Member

    Joined:
    Sep 9, 2008
    Messages:
    120
    Likes Received:
    0
    Hi
    If I hook a 6v bike batt to the white wire, could I use 6v hardware?
    Like motorcycle headlights fe
    Thanks in advance
     
  2. Finfan

    Finfan New Member

    Joined:
    Aug 29, 2008
    Messages:
    871
    Likes Received:
    1
    I've been pondering this idea myself and I think you will probably need a voltage regulator on the white wire to prevent overcharging and possibly a diode to keep the battery from feeding back into the magneto. Hopefully Norman will see this. He has done some work using the white wire to power a light. It might be easier to use a motorcycle battery to run a regular bicycle light system directly then just charge the battery at home periodically.
     
  3. jasonh

    jasonh New Member

    Joined:
    Jun 23, 2008
    Messages:
    1,590
    Likes Received:
    0
    I think I remember seeing a kit somewhere a while back that used a 6v battery for the lights, and the white wire would trickle charge the batt when the lights weren't in use.
     
  4. celestmark

    celestmark New Member

    Joined:
    Jun 11, 2008
    Messages:
    1
    Likes Received:
    0

    I'm trying to find that now!!!

    I want to purchase one ASAP as it's getting darker and darker here and I don't care to be buying batteries every week!

    :ride:
     
  5. Dave31

    Dave31 Moderator
    Staff Member

    Joined:
    Mar 1, 2008
    Messages:
    11,207
    Likes Received:
    16
    I've looked 4 it guys but had no luck
     
  6. sb bikes

    sb bikes New Member

    Joined:
    Jul 24, 2008
    Messages:
    41
    Likes Received:
    0
    I use a 6v power weels battery and just recharge it. But it would be nice to know if the white wire could be used to charge it .
     
  7. Hot Dog Piggy Tails

    Hot Dog Piggy Tails New Member

    Joined:
    Sep 11, 2008
    Messages:
    78
    Likes Received:
    0
    thats 6 - 14 volts ac so first rectify it to dc with well I dont have pphoto bucket look at my icon thumbnail
     
  8. Hot Dog Piggy Tails

    Hot Dog Piggy Tails New Member

    Joined:
    Sep 11, 2008
    Messages:
    78
    Likes Received:
    0
    then a regulating Ic which'el run off only your battery the package with a seperate input for its power then series its circuit inbat, the ac/dc bridge, Ic, and finally battery. and run your lights or what have you from your battery. if you get one with a regul;ator/ cuttoff it'll stop charging for you but the otherones have a range they burn your battery or theIC 9itself) up because the constant charge with no drain so check for battery temp. Some cheaper IC packages actually have an input for the battery thermistor which is axtually cheap its self. The mag white wire only gives back 3 watts so if you run your lights a 1/4 of the time and they draw 12 watts youd be ok cause the charging of the additional day use of 3/4x..Yup Im the Man. Heh Heh
     
  9. jasonh

    jasonh New Member

    Joined:
    Jun 23, 2008
    Messages:
    1,590
    Likes Received:
    0
    Yeah, I think the search function here might need a little work....
     
  10. Finfan

    Finfan New Member

    Joined:
    Aug 29, 2008
    Messages:
    871
    Likes Received:
    1
    Have you put an oscilloscope on the magneto output? I've done electronics for a while so I'm wondering what type of waveform it has.
     
  11. Caus-I-Can

    Caus-I-Can New Member

    Joined:
    Sep 15, 2008
    Messages:
    21
    Likes Received:
    0
    you can buy a 6-9v dc generator/dyno at dick smith/ tandy eletronics aprox size is
    23.7mm times 26.9mm for about $4 aus, sure their would be equivlent in the states.

    very very light to role the axle and plenty of places to station it

    another alternative is the generator out of the self charging winding torches that you c at the dept stores just extented the wires from the circut board to the bulb an splice in a switch that can be put on your handle bars
     
  12. mralaska

    mralaska New Member

    Joined:
    Aug 16, 2008
    Messages:
    42
    Likes Received:
    0
    I have been too lazy to hook up my own scope, but I read a post by a guy who did and he described the output (going by memory) as "3-50 volts peak to peak and not very clean" or something like that.

    To power off the white wire directly the challenge is to find a bulb that will give enough light at low voltage, not burn out from the high voltage, and most important not draw enough power to rob the spark plug. I have a cheap generator light to start my own investigation powering it off the white wire but have not had time to hook it up. Some people report that a cheap Walmart Bell generator set can run off the white wire, others have replaced the bulb and found the right combination by trial and error. I am thinking that if it gives enough light, I still may need to regulate the voltage to keep the bulb intact.

    I have seen various configurations to use the white wire. I have heard you can rectify it then use a battery as a sort of voltage regulator to power LED lights and such but it will eventually burn out the battery unless you put in a real circuit to protect it.
     
  13. Norman

    Norman LORD VADER Moderator
    Staff Member

    Joined:
    Jan 16, 2008
    Messages:
    2,605
    Likes Received:
    1
    You could just buy one of my bulbs or lights and be done with it so you can work on something more fun like squeaking a little more power out of the engine.rotfl
     
  14. Lightfoot

    Lightfoot New Member

    Joined:
    Jul 3, 2008
    Messages:
    21
    Likes Received:
    0
    So does anybody that's done the trial and error testing to find the perfect bulb to run off the white wire have a number for us to save a brother some grief?
     
  15. Motoschwinn

    Motoschwinn Member

    Joined:
    Jun 27, 2008
    Messages:
    434
    Likes Received:
    0
    Hey Norm, how much are just the bulbs? I want to get a retro looking setup for Motoschwinn II
     
  16. jasonh

    jasonh New Member

    Joined:
    Jun 23, 2008
    Messages:
    1,590
    Likes Received:
    0
    Norm, no offense or anything, but I personally would be more interested in an actual electrical system than just a bulb that works. It would allow you to run brighter lights, taillights/blinkers and not have to worry about drawing too much power from the mag...

    For the casual rider, I'm sure your bulbs would work (heck I would like to get one of yours anyway), but for those of us that use our bikes to commute every day (or just me anyway), it'd be nice to have something a little bit better....
     
  17. Caus-I-Can

    Caus-I-Can New Member

    Joined:
    Sep 15, 2008
    Messages:
    21
    Likes Received:
    0
    If you are really in need of finding out next time you ride past an auto-electrician business stop in to work shop (not recption) and ask them if they can quickly test the out put.. will take them all of about 25 secs and i think MrAlaska is pretty close when ive talk to Auto Elecs before they said a normal car alternator puts out upto 80v

    i found pretty much all of them will do it for free specialy if they like your bike
     
  18. Biker Mike

    Biker Mike New Member

    Joined:
    Mar 21, 2008
    Messages:
    143
    Likes Received:
    0
    Anyone ever tried to get 24 oz of beer out of a 12 oz can??? rotfl
     
  19. DragonB

    DragonB New Member

    Joined:
    Sep 27, 2008
    Messages:
    12
    Likes Received:
    0
    divide the dropped voltage by the LED current to get the value of the dropping resistor. If you divide volts by amps, you get the resistor value in ohms. If you divide volts by milliamps, you get the resistor value in kilo-ohms or k.

    Example: 6 volt supply, 3.4 volt LED, 12 milliamps. Divide 2.6 by .012. This gives 217 ohms. The nearest standard resistor value is 220 ohms.

    If you want to operate the 3.4 volt LED from a 6 volt power supply at the LED's "typical" current of 20 ma, then 2.6 divided by .02 yields a resistor value of 130 ohms. The next higher popular standard value is 150 ohms.

    If you want to run a typical 3.4 volt LED from a 6 volt supply at its maximum rated current of 30 ma, then divide 2.6 by .03. This indicates 87 ohms. The next higher popular standard resistor value is 100 ohms. Please beware that I consider the 30 ma rating for 3.4-3.5 volt LEDs to be optimistic.

    One more thing to do is to check the resistor wattage. Multiply the dropped voltage by the LED current to get the wattage being dissipated in the resistor. Example: 2.6 volts times .03 amp (30 milliamps) is .078 watt. For good reliability, I recommend not exceeding 60 percent of the wattage rating of the resistor. A 1/4 watt resistor can easily handle .078 watt. In case you need a more powerful resistor, there are 1/2 watt resistors widely available in the popular values.

    still confused? read all of it here L.E.D Basics; gaining an understanding of how to work with L.E.D.s
     
  20. diffrnt

    diffrnt New Member

    Joined:
    Sep 29, 2008
    Messages:
    2
    Likes Received:
    0
    has anyone thought of using two 6 volt batteries hooked in series-parallel? this would allow charging from the 7.2 volts from the white wire, and allow the use of 12volt lights.
     

Share This Page