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1Back to top Go down   Headlight relay Empty Headlight relay Sun Jul 08, 2012 10:26 am

twincarb

twincarb
Life time member
Life time member
Just been looking into putting a couple of relays in for the headlight... But am trying to establish whats the best route to go... short and simple or adding some complexity into it...

Is the diagram I have drawn potentially going to be too slow in switching?

Just to clarify when I say old loom I mean the original conection to the headlamp...

My short and simple diagram:...
Headlight relay Headli10

Headlight relay Headli10


__________________________________________________
BMW K100LT 1988 Matt Black Peugeot Electra Blue (ELX) Colour is now confirmed...
Yamaha Thundercat
Triumph Spitfire (not a bike but hell it's British chaps)
Headlight relay 169042Headlight relay 169034
    

2Back to top Go down   Headlight relay Empty Re: Headlight relay Sun Jul 08, 2012 10:31 am

Rick G

Rick G
admin
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I have what you call the simple one and I works just fine.
The bosch relays I used have a switching time of 10 - 12 milliseconds so I really don't think you will be concious of any lag.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1999 K1100 LT with a Big Block 1200
    

3Back to top Go down   Headlight relay Empty Re: Headlight relay Sun Jul 08, 2012 11:20 am

charlie99

charlie99
VIP
VIP
short and simple works just fine twincarb .....and if you need you can go back to the original purdy easy ...(not that you would want to ) we gotta look after those poor old switches and wires .


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
1987 k100rs ########   "Red"  - (red sports rs TWB style )
1989 K100rt #009637   "Black Betty"  (naked rt ala Nigel , now sporting an rs main fairing )
    

4Back to top Go down   Headlight relay Empty Re: Headlight relay Sun Jul 08, 2012 4:46 pm

robmack

robmack
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Life time member
This is how I did mine:
http://k100rt.aforumfree.com/t1184-converting-k100rs-to-k100rt#6841
It echos your simpler design. Relay switching time has never been a problem and it has been working great for years now.


__________________________________________________
Robert
1987 K75 @k75retro.blogspot.ca
http://k75retro.blogspot.ca/
    

5Back to top Go down   Headlight relay Empty Re: Headlight relay Sun Jul 08, 2012 5:14 pm

twincarb

twincarb
Life time member
Life time member
thanks for the replys, Rob having had a quick read of your posts, so i can see CF reason for the full circuit, however I cant see anything going wrong with the simple method...


__________________________________________________
BMW K100LT 1988 Matt Black Peugeot Electra Blue (ELX) Colour is now confirmed...
Yamaha Thundercat
Triumph Spitfire (not a bike but hell it's British chaps)
Headlight relay 169042Headlight relay 169034
    

6Back to top Go down   Headlight relay Empty Re: Headlight relay Sun Jul 08, 2012 11:06 pm

robmack

robmack
Life time member
Life time member
Twincarb,

The more complex solution has the same relay parts count than the simpler one but the added diodes prevent damage should the circuit be plugged in improperly. That is a mute point if you plan on making the circuit part of the wiring harness. The simpler circuit functions equally well, is easier to wire up and test and probably has slightly better reliability having a lower component count. I think you'll be happy with either one.


__________________________________________________
Robert
1987 K75 @k75retro.blogspot.ca
http://k75retro.blogspot.ca/
    

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