Nighty Posted November 24, 2003 Report Posted November 24, 2003 Lo all, I am working on a street legal banshee, For my battery to charge i will need dc power so i took my multimeter thingy and started to test voltages, but no mather what i try i wont get any readings. Even if i try directly from my lights connectors i wont get DC power! The banshee service manual says i should try dc 20v and should get a value of around 11.8-14,5 volts I used 2 digital multimeters, one of these also has an AC option and when i try that i DO get a reading of 11,8 to 14,5 volts. IF my banshee is delivering AC power instead of DC power, howcome my lights are burning? Any idea's? Quote
boonman Posted November 24, 2003 Report Posted November 24, 2003 That's because lights don't care if it is AC or DC voltage. And your shee does in fact put out AC voltage. in order for you to run a battery, you will have to purchase a voltage rectifier from the local electronics store, and isolate the battery from the rest of the electrical system. Quote
Nighty Posted November 24, 2003 Author Report Posted November 24, 2003 Wow! fast reply! So the service manual is wrong! Thanks, I'll get one right away from the local store. Quote
boonman Posted November 24, 2003 Report Posted November 24, 2003 Believe it or not, your automobile alternator puts out AC voltage as well. It is even 3 phase!!!! However, it is internally switched to DC current that can be used by the vehicle. On a banshee, they could get away with just using the AC voltage, so they left it that way.... Quote
bronco91shee Posted November 24, 2003 Report Posted November 24, 2003 Boonman, u r pretty good. Im just learnin bout all this ac/dc and how to convert stuff in my college class. Ur right on man. Maby u can help me w/ my hmwk next semester-wink. but yeah, it puts out ac. Peace out. Quote
Aussie Quad Racer Posted November 24, 2003 Report Posted November 24, 2003 do you need to have a battery to get it registered? I needed dc for my fuel pump and i used a regulator/rectifier with battery eliminator from an XR250 When you convert it to dc you will need some sort of battery or battery eliminator to keep the voltage consant. Note - a battery eliminator is nothing flash, is just a capacitor. Quote
Justintoxicated Posted November 24, 2003 Report Posted November 24, 2003 A voltage rectifire and a small capacitor to help stabalize the current should only cost a couple $$ to charge a battery. I'm not sure the cap would even be needed. Quote
Aussie Quad Racer Posted November 25, 2003 Report Posted November 25, 2003 a cap is not required when using a battery but why go to the cost and expense of putting a battery in the bike when a small cap(about the size of a photo film container) will do the job of a battery Quote
raxen Posted November 25, 2003 Report Posted November 25, 2003 A Battery = long discharge time, relatively constant current,needed to power fuel pump . All you need is a voltage rectifer (4 diodes, bridge) and about 30 minutes hook up a battery, no capacitor required. I just did this hooking up a battery for my nitrous kit. Quote
Aussie Quad Racer Posted November 25, 2003 Report Posted November 25, 2003 You all seam to be missing the point. The bike does not need a battery to start up so why have 1? When you turn your bike off you dont want anything running. Using a cap instead of a battery will supply a smooth and consistant voltage. The reg/rec/cap that i used came off a 12v xr250 which has all the indicators, brake, stop, headlight and other elec gear and it works fine on the xr250 and i know for a fact that it works well on my bike for running a fuel pump. At idle it drops down to 10.5 volts but you dont need full fuel pressure at idle and nor do you need full light output at idle because your obviously not moving if your idleing. Bring the revs up to about 2-3 thousand and your at full voltage of 14.3v all the way to peak rpm. Quote
Justintoxicated Posted November 25, 2003 Report Posted November 25, 2003 You all seam to be missing the point. The bike does not need a battery to start up so why have 1? When you turn your bike off you dont want anything running. Using a cap instead of a battery will supply a smooth and consistant voltage. The reg/rec/cap that i used came off a 12v xr250 which has all the indicators, brake, stop, headlight and other elec gear and it works fine on the xr250 and i know for a fact that it works well on my bike for running a fuel pump. At idle it drops down to 10.5 volts but you dont need full fuel pressure at idle and nor do you need full light output at idle because your obviously not moving if your idleing. Bring the revs up to about 2-3 thousand and your at full voltage of 14.3v all the way to peak rpm. I agree, unless your trying to run more than one thing of the new circuit, then you should go with a battery so as not to put too much drain on the cap... Quote
WickedBanshee Posted November 26, 2003 Report Posted November 26, 2003 angus young is the man oh, wrong ac/dc Quote
Nighty Posted November 29, 2003 Author Report Posted November 29, 2003 lol well i now have one of those diode bridges hooked up. the ac is now dc. my normal lights are hooked up before the diodebride so the normal banshee lights only light up when the engine is running. all the other stuff (blinking crap honky thing, city lights) are behind the diodebridge.. but the battery will probably help out the diodebridge. since i heared a diodebridge needs to be cooled if great currents are flowing. oh and the stock banshee voltage regulator also rectifies the max voltage to about 14.8 volts so its all great!!! Quote
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