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(experiment) With Replaceing 1157 Lamps With 55w Halogen Bulb


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#46 KennyP OFFLINE  

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Posted January 19, 2013 - 07:37 PM

I'm glad you know what you are talking about, cause you lost me!


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#47 larrybl OFFLINE  

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Posted January 19, 2013 - 09:04 PM

Sorry, Maybe pictures will help.

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  • diode 1.JPG
  • diode 2.JPG
  • diode 3.JPG


#48 larrybl OFFLINE  

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Posted January 19, 2013 - 09:52 PM

Sorry Kenny, I try to make theory work in the real world. Some times I win, most of the time I let the smoke out of the parts I work with. I am able to get 48 vdc from a stock craftsman stator while allowing the stock rectifires to contune to charge the battery, run the PTO and power the stock 1156 lamps. I feel I am close to a break through on powering the 28 vdc leds without serious modifications or expensive parts. Sorry I got too technical. But this is fun / interesting to me.



#49 larrybl OFFLINE  

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Posted January 19, 2013 - 10:03 PM

Here is an example. I have been gathering parts that (hopefully) will allow a varying 28 - 48 vdc to be tamed to a constant 28 vdc.

 

The catch here is the LM-317 regulator has a MAX input rated at 28 vdc, I am hopeing the low current draw of the leds will allow the LM-317 to operate at a higher rated voltage. If not, I'll air out the shop again.

 

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  • P1070837.JPG

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#50 HowardsMF155 OFFLINE  

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Posted January 19, 2013 - 11:00 PM

Larry, I'm not sure how to do it, but  I remember seeing "stacked" LM 317s in a wiring diagram once.  That allowed them to work with voltages greater than  whatever they are rated at.  Can't remember how it was done, though.


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#51 larrybl OFFLINE  

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Posted January 20, 2013 - 12:03 AM

I've been searching the internet (did find a couple lm-317 power supply projects I liked) again I digress. I only have the one 317 and will see how well it works with my temporary circuit. If all goes well, I;ll stop by ratshack and pick up a perf board and new components X2 so to have a spare regulator. Should know tomorrow if this works, or smokes. stay tuned.

 

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  • P1070838.JPG


#52 larrybl OFFLINE  

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Posted January 20, 2013 - 12:20 AM

Just tested the 317 on the bench. My power supply provides 38 vdc max and I got 37.4 out of the 317, and it is adjustable from 1.2 all the way to 37.4. I will see how it acts with the stator's 48 vdc tomorrow.



#53 KennyP OFFLINE  

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Posted January 20, 2013 - 03:51 AM

Larry, I'm lost when it comes to this kind of stuff. Not your fault. Just don't understand it.



#54 larrybl OFFLINE  

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Posted January 20, 2013 - 01:00 PM

Well, the regulator is a success!  :dancingbanana:  A steady 27 volts DC from the varing AC voltage off the stator, without modifing the orginal electrical wireing of the machine. Not sure how much extra light I will obtain, but if it dosn't I still have that BIG honkin 12 V led array.   

Such a nice weekend I even was able to get a new coat of paint on the body pannels.

Attached Thumbnails

  • 27 volts.JPG
  • lights lit.JPG
  • Temp Circuit.JPG
  • reflector.JPG
  • tins 1.JPG
  • tins 2.JPG
  • tins 3.JPG

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#55 larrybl OFFLINE  

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Posted January 20, 2013 - 06:09 PM

Kenny, It dosn't matter how it works, but it works. The LM317 regulator is great at keeping the voltage right at 27 volts. LED's are mounted and ready to go. Here is the progress, and a side by side compairson with the 1156's.

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  • P1070849.JPG
  • P1070851.JPG
  • P1070852.JPG

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#56 KennyP OFFLINE  

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Posted January 20, 2013 - 08:55 PM

Red is going to feel very special when you get all this done! It's all looking good. Neat job on getting the lights to work. I could have not figured that out.


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#57 larrybl OFFLINE  

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Posted January 20, 2013 - 09:09 PM

In order, Both LED and 1156, next LED only, next 1156 only. Seems the camera has trouble distinguishing between LED and incandesant. Working on a housing for the parts, an old dimmer switch seems to be working nicely. Still at $0.00 investment on this.

Attached Thumbnails

  • both.JPG
  • led only.JPG
  • 1156 only.JPG
  • P1070869.JPG

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#58 larrybl OFFLINE  

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Posted January 21, 2013 - 08:23 PM

Rather disapointed with the 28 volt leds. Here is a comparison from the leds, to regulart 1156,s to a single 35w haligon (one burnt out on BMP).
Looks cool, but not very functional.

 

Attached Thumbnails

  • led only.JPG
  • 1156 only.JPG
  • single 35w haligon.JPG

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#59 KennyP OFFLINE  

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Posted January 22, 2013 - 07:15 AM

Well, that didn't work out so well. Sorry to see that!



#60 larrybl OFFLINE  

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Posted January 22, 2013 - 01:38 PM

Nothing ventured nothing gained. Only investment was time. Hmmmmm wonder how the led's would look under the running boards? 






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