|Posted on Monday, August 01, 2011 - 10:51 pm: ||
I found this mod on another forum so I thought I would post it up here. Very simple to do and saves you $20.
Just pull the cover and remove the 2nd pin on the ic chip.
|Posted on Monday, August 01, 2011 - 11:37 pm: ||
|Posted on Tuesday, August 02, 2011 - 08:16 am: ||
For the record, that would technically be the 7th pin, but we know what you mean.
Pin 7, Lamp outage detection
The lamp current is monitored via an external shunt
resistor R3 and an internal comparator K1 with its
reference voltage of typ. 81 mV (VS = 12 V). The outage
of one lamp out of two lamps is detected according to the
Nominal current of 1 lamp: 21 W / (VS = 12 V):
Ilamp = 1.75 A
Nominal current of 2 lamps: 2 x 21 W / (VS = 12 V):
Ilamp = 3.5 A.
The detection threshold is recommended to be set in the
middle of the current range: Ioutage 2.7 A
Thus the shunt resistor is calculated as:
R3 = VT (K1) / Ioutage
R3 = 81 mV/2.7 A = 30 m.
Comparator K1‘s reference voltage is matched to the
characteristics of filament lamps (see “control signal
threshold” in the data part).
The combination of shunt resistor and resistance of wire
harness prevents Pin 7 from a too high voltage in the case
of shorted lamps.
So you loose your dead lamp indicator, but the flash rate is correct.
And I wonder why on earth that chip is socketed on that part? That's an expensive way to build a commodity part...
|Posted on Tuesday, August 02, 2011 - 09:01 am: ||
I'm an ET by trade and one thing I've learned when explaining electronics is that you gotta keep it simple for the simple minded!
|Posted on Thursday, August 04, 2011 - 10:35 am: ||
Mr. Simple Minded asks . . ."So Terry, . . .if I take apart my flasher, disconnect the part shown, put it back on the bike . . .can I than use LED bulbs rather than stock?"
Thanks in advance . . .(and remember to keep it simple)
|Posted on Thursday, August 04, 2011 - 11:11 am: ||
Yes but you can use LED bulbs without the mod they will just flash faster. I rather the faster flash.
|Posted on Monday, October 10, 2011 - 02:02 am: ||
So if we really want to get anal, we could adjust the resistor so that if we lose an LED fixture we will once again get the rapid flash, right?