Retrofitting LED Brake, tail and turn signals to GL1500


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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by WingAdmin » Fri Oct 17, 2014 12:46 pm



ronjr123 wrote:Are your front turn signals also LEDS? How did you overcome the auto cancelling function?
Yes, they are all LEDs. I knew 1157 brake light filaments are 21 watts, and that the OEM bike has two of them, so that's 42 watts, or 3.5 amps, which works out to around 3.4 ohms. So I installed two 50 watt, 4 ohm power resistors, one on each side (left/right) in parallel with the LEDs on the back. Sinking 50 watts of power creates a lot of heat (think of a 50 watt light bulb), and while the resistors do have cooling fins on them, I didn't want something getting that hot around my trunk/saddlebag plastic. So I used stainless steel hose clamps to strap them tightly to the frame at the back of the bike, effectively turning the frame into one giant heat sink. It works very well.





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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by gipsy42 » Thu Nov 13, 2014 8:34 pm

WingAdmin wrote:Everybody loves LED lights. What's not to love? They're bright, they turn on and off in an instant, and they virtually never burn out...
Below is the circuit I designed and built - feel free to use it for noncommercial purposes. (click image for full size image)
]
Hi, I´ve found your job marvelous, as are many the other ones you've posted; I'm planning to do this in my bike, but not right away, as we're entering summer season now. Following your drawings I started by building the PWM.
And thinking loudly (in case I'm wrong, nothing came out of my mouth, LOL) I'm not an electronic expert, but by checking other circuits I think there is something wrong in the circuit, isn't the pins 3 and 7 of the IC criscrossed or swapped?? Shouldn't the output come from pin #3??.
Soon I'll be posting pictures of some Jobs I've done following your advise.
Mario
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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by WingAdmin » Fri Nov 14, 2014 10:44 am

mariojl wrote:
WingAdmin wrote:Everybody loves LED lights. What's not to love? They're bright, they turn on and off in an instant, and they virtually never burn out...
Below is the circuit I designed and built - feel free to use it for noncommercial purposes. (click image for full size image)
]
Hi, I´ve found your job marvelous, as are many the other ones you've posted; I'm planning to do this in my bike, but not right away, as we're entering summer season now. Following your drawings I started by building the PWM.
And thinking loudly (in case I'm wrong, nothing came out of my mouth, LOL) I'm not an electronic expert, but by checking other circuits I think there is something wrong in the circuit, isn't the pins 3 and 7 of the IC criscrossed or swapped?? Shouldn't the output come from pin #3??.
Soon I'll be posting pictures of some Jobs I've done following your advise.
Mario
Normally, yes. But in this case, we're using the output through the potentiometer and diodes to regulate the amount of time that C1 is charged or discharged, which is what is used to determine the length (duty cycle) of the PWM pulse. The discharge line (which is open collector, normally to discharge a capacitor) is then used to trigger the MOSFET, which in turn runs the LEDs.

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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by gipsy42 » Fri Nov 14, 2014 12:22 pm

Thank very much you for your explanation, as son as I have the PWM working, I´ll start retrofiting my rear ligths,
Mario
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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by GlimWas » Tue Dec 30, 2014 3:15 pm

Don't you think it's possible to use RGB LED's?

Use the red contact for taillight, and the other two contacts for braking, so that the LED's are emitting 'white' light and
put out brighter light? The red LED's are dimmed by the red lenses............

This would eliminate the need for an extra circuit.............. Or am i cutting corners right now?
I happen to have some RGB led's and will try this out. I'll be back ;-)

Gr. Willem ,Holland
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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by WingAdmin » Fri Jan 02, 2015 1:37 pm

I have yet to see RGB LEDs that have anywhere near the brightness of single-purpose LEDs.

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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by GlimWas » Fri Jan 02, 2015 2:57 pm

We'll see if that is the case or not. It is not that question your judgement, i just happen to have some RGB led's lying around, so it is easy to try.... :D
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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by ronjr123 » Sun Jan 18, 2015 10:32 am

For all that have done this already:

I have started my led mod. First light assembly I took apart were the ones the the side of the trunk. These have separators inside the white part of the housing. How did you guys get around these?

I have also found the roll of lights I bought extremely hard to solder to. Any tips to make this easier?

I have noticed most of you have just placed two strips in the side lights on the trunk and saddlebags. I was looking to add a third in the middle. Would that be too much light? I have 5050 leds.

One other thing. If I want these side lights to flash, do they also require a power resistor like the front and rear? Or is the combined parrell resistance without a resistor too much when flashing?

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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by WingAdmin » Mon Jan 19, 2015 12:01 pm

ronjr123 wrote:For all that have done this already:

I have started my led mod. First light assembly I took apart were the ones the the side of the trunk. These have separators inside the white part of the housing. How did you guys get around these?

I have also found the roll of lights I bought extremely hard to solder to. Any tips to make this easier?

I have noticed most of you have just placed two strips in the side lights on the trunk and saddlebags. I was looking to add a third in the middle. Would that be too much light? I have 5050 leds.

One other thing. If I want these side lights to flash, do they also require a power resistor like the front and rear? Or is the combined parrell resistance without a resistor too much when flashing?
For the separators: I just cut them out (I think I used a Dremel tool, if I recall).

When you cut the LED strips and need to solder to them, you first must remove all the plastic/rubber cover, exposing the conductors. The conductors are coated in a shellac-like coating that must be gently and completely scraped away, exposing shiny, clean copper. Only then will the solder adhere to them.

As for a third strip: it might be bright. I was fine with two, I think that was about the correct brightness, but it's up to you and your preferences.

Very likely you'd still need a resistor to flash them - but give it a try without, you never know. It might draw enough so that you can get away without one.

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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by ronjr123 » Fri Jan 23, 2015 2:16 pm

In your circuit is the voltage regulator a 5 or 12 volt one? Does it matter?

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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by ronjr123 » Fri Jan 23, 2015 3:17 pm

Never mind. I answered my own question. Duh

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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by ronjr123 » Wed Jan 28, 2015 6:58 pm

Ok Wingadmin,

I hate to keep bothering you about this. I have been in process controls for over 20 years but, my board/component level trouble shooting and repair have seem to gone the way of the dodo.

I have built the circuit as you have drawn it. Yet I have a constant 12 out the mosfet. I may be very well be bad, I know these can be finicky at times. My main concern is the input voltage to pin two through the diodes and pot. When turning the pot in either direction the voltage to pin 2 of the timer never changes. It is always 5 volts. So the output on pin 7 never changes to vary the brightness. And yes I have checked and rechecked the polarity of the diodes in the circuit.

All of that being said, some of the components I used are not exactly the same as yours. Specifically the timer and mosfet. The timer I have is an NE555 timer. The mosfet is and IRF4095. I only did this cause I wanted to get everything at amazon.

Any suggestions? I really want to get this working before I move onto the lights themselves.

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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by WingAdmin » Wed Jan 28, 2015 9:33 pm

ronjr123 wrote:Ok Wingadmin,

I hate to keep bothering you about this. I have been in process controls for over 20 years but, my board/component level trouble shooting and repair have seem to gone the way of the dodo.

I have built the circuit as you have drawn it. Yet I have a constant 12 out the mosfet. I may be very well be bad, I know these can be finicky at times. My main concern is the input voltage to pin two through the diodes and pot. When turning the pot in either direction the voltage to pin 2 of the timer never changes. It is always 5 volts. So the output on pin 7 never changes to vary the brightness. And yes I have checked and rechecked the polarity of the diodes in the circuit.

All of that being said, some of the components I used are not exactly the same as yours. Specifically the timer and mosfet. The timer I have is an NE555 timer. The mosfet is and IRF4095. I only did this cause I wanted to get everything at amazon.

Any suggestions? I really want to get this working before I move onto the lights themselves.

The pot should adjust between the positive and ground, which adjusts how quickly C1 charges and discharges.

I would keep the MOSFET disconnected until you are sure you have the 555 oscillating correctly. Pretty much any 555 should work, NE555 should work just fine.

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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by japbikejerry » Thu Nov 19, 2015 2:42 am

would you please answer a few questions for me ?
what are these three items : STP80PF55, LM 7812, LM555C
I do understand everything else on your schematic
as I went to radio shack to get parts and they looked at me and had no clue
I do have some electronics knowledge but has been a long time
great article
thanx japbikejerry

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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by WingAdmin » Thu Nov 19, 2015 9:47 am

japbikejerry wrote:would you please answer a few questions for me ?
what are these three items : STP80PF55, LM 7812, LM555C
I do understand everything else on your schematic
as I went to radio shack to get parts and they looked at me and had no clue
I do have some electronics knowledge but has been a long time
great article
thanx japbikejerry
The LM7812 is a 12 volt regulator, that keeps the circuit voltage at a steady 12 volts even though the bike's voltage may raise as high as 14 volts.

The LM555C is a standard 555 timer, it's been around for about 45 years - it's a pretty common piece.

The STP80PF55 is a high-power P-channel MOSFET, rated for 55 volts and up to 80 amps.

The drones at Radio Shack will have no clue when it comes to this kind of stuff. All they do there is sell gadgets and cell phones anymore. And overpriced batteries. Go to http://mouser.com or http://digikey.com and you should be able to find what you need.

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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by japbikejerry » Thu Nov 19, 2015 3:20 pm

thank you for the info
I will go there for my materials

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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by cwgreen1938 » Mon Mar 28, 2016 1:17 pm

:( :shock: :idea: Wingadmin, I noticed you wired your led strips in parallel, what difference would it make hooked up in series? I've already made up the lower center light between the bags that used to be a reflector in series and it works but I may need to change it? Thanks

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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by WingAdmin » Fri Apr 01, 2016 4:41 am

cwgreen1938 wrote::( :shock: :idea: Wingadmin, I noticed you wired your led strips in parallel, what difference would it make hooked up in series? I've already made up the lower center light between the bags that used to be a reflector in series and it works but I may need to change it? Thanks
You can wire them in series if the strips are rated for 6 volts (I haven't seen any, but doesn't mean they don't exist) - in series, the voltage ratings of all the components in the series must add up to the supply voltage. So if you had four 3-volt rated strips, you would wire four of them in series in order to hook up to a 12 volt source.

Being that the strips I used (as most strips are) are rated for 12 volts, each requires a full 12 volts, so they had to be wired in parallel.

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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by cwgreen1938 » Thu Apr 07, 2016 4:38 pm

Thanks admin, I'm not an electrician so I didn't know. Thanks very much for the info. Man, I really enjoy this forum, so many nice people willing to help . I tell everyone I see that rides a Wing about you guys and this forum.

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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by Davek80514 » Sat May 14, 2016 10:35 am

Are there any direct replacement bright led lights that can be installed replacing the 1156 & 1157 bulbs?
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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by WingAdmin » Sun May 15, 2016 10:02 pm

Davek80514 wrote:Are there any direct replacement bright led lights that can be installed replacing the 1156 & 1157 bulbs?
There are...but I've never really found any that are bright enough and emit light in the correct directions to fully illuminate the light fixture.

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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by Stew » Sat Jun 02, 2018 10:03 am

cwgreen1938 wrote:
Mon Mar 28, 2016 1:17 pm
:( :shock: :idea: Wingadmin, I noticed you wired your led strips in parallel, what difference would it make hooked up in series? I've already made up the lower center light between the bags that used to be a reflector in series and it works but I may need to change it? Thanks
I know this post is a couple years old but just wanted to point out that with these type of LED strips you can actually wire series or parallel and they'll work just the same. Parallel works of course because you are maintaining 12v to each separate strip, but series also works because in that case you're effectively re-joining two sections that you cut and they work just the same as if you hadn't cut them in the first place.

Using the left over side-emitting strips from my side marker conversion you can see that the top two strips are wired parallel and the bottom two in series, both ways work with the same brightness.





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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by MikeB » Sat Jun 02, 2018 8:21 pm

Seeing things in what looks like series and or parallel is a little deceiving.
Electrically, the LED's need to be connected in parallel so that there is full system voltage applied to the LED strips. The would not work if connected in series electrically.

All the LED strips on these two pages appear to be connected electrically in parallel.

I hope the below image will better explain the difference between series and parallel.


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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by Stew » Sat Jun 02, 2018 11:19 pm

Hi Mike, the LED strip lights can be confusing... there is actually a 12v bus that runs down the whole length of the strip which is how it is possible to cut it and still have it work. But, the 3 LED's in each cut segment are wired in series and connects to that 12v bus which is why you can only cut at the designated points.

As far as the LED strips are concerned it doesn't matter if it looks like we've wired them in series or parallel, electrically it's the same to the strips. In fact when making spools the factory will connect sections together end-to-end which would technically be connecting them in series but really all they're doing is connecting the 12v bus from the end of one to the beginning of the next, see the picture below to see a factory splice... that is exactly the same as my pic above depicting a series connection.







Another way to look at it is look at a pair of parallel connected strips and series connected strips like below




Now straighten out the parallel connected strips... electrically it's the same as the series connected strips, you are just tapping into the 12v bus that runs down the entire length of the strips at a different position




I'm sure there is a limit... you probably couldn't connect 500' of these together end to end and be supplying power at one end, the 12v bus surely wouldn't be able to handle that much current but for the few feet we're talking on our motorcycles it doesn't matter how it looks like you've wired them, series or parallel, to the strips electrically it's the same either way.

I'm only talking about the strips lights, individual LED's like the standard 5mm T1 is a whole different story.
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Re: Retrofitting LED Brake, tail and turn signals to GL1500

Post by Stew » Mon Jun 04, 2018 8:12 pm

Pardon me while I feel a little sheepish... both of my examples above were parallel circuits, below would be wiring two strips in series and as WingAdmin correctly pointed out, would not work unless they were 6v strings.




For whatever reason in my mind I thought the question of can you wire them in series meant daisy chaining strings together, which yes you can definitely do. I don't mind admitting when I'm wrong :oops: Sorry for the mix up!


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