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momentary start to kill lights


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dualsport 
Silver - Posts: 983
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Joined: September 27, 2005
Location: United States
Posted: September 06, 2010 at 3:52 PM / IP Logged  
momentary start to kill lights - Page 2 -- posted image.
Had some spare time, so I posted it up anyway, interested or not-momentary start to kill lights - Page 2 -- posted image.
The starter pulse input is connected to the actual starter motor, not the relay. When not cranking, it will basically act as a ground for the relays, because it's so low in resistance. The rest is pretty much self explanatory.
oldspark 
Gold - Posts: 4,913
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Joined: November 03, 2008
Location: Australia
Posted: September 06, 2010 at 8:35 PM / IP Logged  
Why not do the above with one relay instead of having the latching IGN (upper) relay?
dualsport 
Silver - Posts: 983
Silver spacespace
Joined: September 27, 2005
Location: United States
Posted: September 06, 2010 at 11:46 PM / IP Logged  
Because the upper relay allows the lights to remain off for the period of time when the ignition is first switched on to the point where cranking begins.
With an HID headlight this prevents double striking the HID ignitor circuit each time the bike is started. The single relay may be used if all you want to do is kill the light during the actual cranking time, but the benefit of the latching relay is worth the small additional cost, if that's the concern.
oldspark 
Gold - Posts: 4,913
Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: September 07, 2010 at 10:22 PM / IP Logged  
Excellent!
Sorry - I'm so used to extra componentry for no reason - usually due to convoluted thinking; sometimes due to missed simplified alternatives.
howie ll 
Pot Metal - Posts: 16,466
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Joined: January 09, 2007
Location: United Kingdom
Posted: September 08, 2010 at 9:53 AM / IP Logged  
Thank you spark and sport for coming in here, I was treading water waiting for one of you to come up with something here.
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