| 7 volt regulator on 1982 GL1100A, made my own | Rate Topic |
| Moderators: redbaron, MDKramer, Flyone, AZgl1500 | Page: 1 2   |
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| Posted: Wed Aug 16th, 2006 05:01 pm | 1st Post |
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My 7 volt regulator had gone intermittently bad, causing my temperature and fuel gauges to intermittently die. I decided I needed to do something about it. Thinking I wasn't likely to find a replacement easily, I fabricated my own. Total cost to build a new regulator using Digi-Key parts was $1.73, not including shipping, tax, wires or the perfboard (which I already had). Parts I used, with http://www.digikey.com part numbers next to them in case anyone wants to try this: LM317 Regulator IC: LM317TFS-ND 5K Trimpot: 490-2926-ND 249 ohm resistor: PPC249XCT-ND 1N4002 diode: 1N4002-E3/4GICT-ND Here is the circuit I made, apologies for my chicken-scratch:  I mounted the components on some perfboard and soldered them in place:   I then encapsulated the whole thing using a hot glue gun, to make it (more or less) waterproof. I left the adjustment screw of the trim pot accessible, to adjust the final output when I installed it.  I cut the old one out of the bike, wired up the 12v and ground lines, started the bike, and adjusted the trimpot to get 7.00 volts out of the output. Then I wired that to the gauges, and it all works good as new! Here's the relevent portion of the bike schematic: 
____________________ http://www.goldwingdocs.com Read my illustrated How To guides! |
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| Posted: Wed Aug 16th, 2006 05:09 pm | 2nd Post |
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Nice job, I especially like the price!
____________________ If you can't ride, fly or sail it, why bother? 2001 Goldwing 1800 Paul W. |
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| Posted: Wed Aug 16th, 2006 05:23 pm | 3rd Post |
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Nice job... I did the same thing but soldered all the components directly to the LM317. I used 200 ohm and 1000 ohm fixed values and got 7.3 volts. I put the same connectors on as the old regulator put it all inside some large size shrink tube that I had. Total package was about the size of a stick of gum plus the leads... Just pugged it in in place of the original (left the old regulator buried in place).. guages read normal as far as I can tell... I suppose a skosh higher... My total cost was nothing since I had all the parts.. Jim
____________________ Please consider helping Rudy at the link... LINK TO HELP RUDY --------------- Have a Gold Wing? Please take the AGE POLL HERE ! --------------- If a man speaks in the forest and there is no woman to hear him, is he still wrong? --------------- SDB/Jim 2000 GL1500SE in CA 1983 GL1100I in SC --------------- But formerly San Diego and now "temporarily" Aiken, SC |
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| Posted: Wed Aug 16th, 2006 06:30 pm | 4th Post |
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What! You didn't etch a new circuit board? How disappointing.  Seriously, can this thing be adjusted to put out 9V? I need a new power source for my old Passport radar detector.
____________________ '92 Buick Roadmaster Estate Wagon '81 GL1100 Interstate (not quite working, yet) |
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| Posted: Wed Aug 16th, 2006 06:41 pm | 5th Post |
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I haven't etched a circuit board since high school, and that is, um, well, a while ago.  Seriously, I have done a lot of prototyping work for some products in the past couple of years, and there are places on the web you can send CAD drawings to, and they will send you back an etched board, with multiple layers, plated through holes, whatever. Yes, it will adjust anywhere from next to nothing to around 11 volts, although some of the resistor values might need to be changed to get the lower voltages, I don't have a calculator handy. But that circuit as shown will easily do 9 volts. If the radar detector draws a bit of current you might need to put a heat sink on the LM317.
____________________ http://www.goldwingdocs.com Read my illustrated How To guides! |
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| Posted: Wed Aug 16th, 2006 06:59 pm | 6th Post |
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For the LM317 Vout~ 1.25*(1+R2/R1) where R2 is the higher value to ground (adjustable pot or in my case the 1000 ohm resistor) and R1 is from Vout to Vadj.... and of course you can't get higher than the input voltage... about 1 amp without a heat sink and more with (I don't remember) Jim Last edited on Mon Jul 14th, 2008 06:42 pm by sandiegobrass ____________________ Please consider helping Rudy at the link... LINK TO HELP RUDY --------------- Have a Gold Wing? Please take the AGE POLL HERE ! --------------- If a man speaks in the forest and there is no woman to hear him, is he still wrong? --------------- SDB/Jim 2000 GL1500SE in CA 1983 GL1100I in SC --------------- But formerly San Diego and now "temporarily" Aiken, SC |
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| Posted: Thu Aug 17th, 2006 02:25 am | 7th Post |
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Nice work GSMacLean definitely a keeper. (Copied and Saved)
____________________ 87 GL1200I Grey 03 GL1800 Red |
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| Posted: Thu Aug 17th, 2006 09:59 am | 8th Post |
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Just use a 7807 voltage regulator and do away with most of the circuit. Raymond
____________________ 1983 GL1100 Interstate 1983 GL1100 Aspencade 1997 GL1500 SE |
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| Posted: Thu Aug 17th, 2006 12:05 pm | 9th Post |
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Silicon Sam wrote:Just use a 7807 voltage regulator and do away with most of the circuit. The 7807 won't drift on you either. A little harder to find but worth it IMO.
____________________ Rudy RudysProducts Info: Due to recent declining health, I have decided to pass Rudy's Products on to a nearby friend who will be trained to do it right. As a result, product availability will be hit or miss during the transition, both at the web store and at Cyclemax. SmartLights are discontinued with the possibility of occasional small batches being made if there is interest. The transition will be gradual and I will continue to make items as I am able. Please expect extended delivery times. If you have a specific need, please let me know and I will attempt to accommodate you. I thank you all for your friendship, support and loyalty. |
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| Posted: Sat Apr 14th, 2007 09:15 pm | 10th Post |
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Or a 7805 with a 2v Zener off the gnd leg Any of these ways will work fine. If you really want to get fancy you can use a LM723 but the circuit desn't require that much regulation... The big thing is to get it waterproofed as well as possible....
____________________ 1986 GL-1200 Aspencade 53,000 Miles so far... 2001 GL-1800 ABS 36,000 Miles 1983 GL-1100 Interstate 204,000 Miles 1988 BMW K100LT 31,000 Miles 1981 GL-1100 with Vetter Tourpak 107,000 Miles 1981 HD Sportster 42,000 Miles 1978 Suzuki GS-550 36,000 |
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| Posted: Sun Apr 19th, 2009 07:22 am | 11th Post |
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GS, I just ran across your article on the 7VDC replacement power supply for the GL gages. I have the GL 500i & 650i and they have the same power supply. I've acquired some digital volt and amp gages for these bikes that require 5VDC. I can use your pwrsup schematic as a fall back, but it seems that some where in the bike's circuit I should be able to recover the 5VDC that is left from reducing the 12V to 7V. I made a drawing of it some time ago and can't find it at the moment but a fresh look at it from someone who is familiar with it would help. Thanks, Brian Michigan
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| Posted: Sun Apr 19th, 2009 02:07 pm | 12th Post |
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Honestly, if you need 5 VDC, just go to Radio Shack and buy a 7805 for a couple dollars. It will give you exactly 5V, and you won't need any extraneous circuitry. I have also used 7812's in my bike for 12 volt circuitry that I've added that could be damaged by the 15+ volts that occasionally appears on the bike's electrical system.
____________________ http://www.goldwingdocs.com Read my illustrated How To guides! |
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| Posted: Wed Apr 22nd, 2009 11:10 pm | 13th Post |
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"Honestly, if you need 5 VDC, just go to Radio Shack and buy a 7805 for a couple dollars. It will give you exactly 5V, and you won't need any extraneous circuitry." Thanks for the tip, but I was asking the question just so I wouldn't have to add any of this extraneous circuitry. I did find my schematic drawing so when I get my m/c out from winter hibernation, I'll test out the voltage pickoffs I selected. If that doesn't work out, I'll try your suggestion. Thanks, Brian
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| Posted: Thu Apr 23rd, 2009 03:42 am | 14th Post |
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You guys blow me away with your knowledge on this subject. To me electricity is one of the "black arts!" Medicj
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| Posted: Thu Apr 23rd, 2009 07:35 am | 15th Post |
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GS, you are like MacGyver. Can you really make a nuclear bomb with only a piece of string, some dirt, and a tube sock?
____________________ Joe Darksider #493 Former bikes: '80 CB750 Custom '86 GL1200 Interstate |
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| Posted: Thu Apr 23rd, 2009 01:29 pm | 16th Post |
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nsjoe wrote: GS, you are like MacGyver. Can you really make a nuclear bomb with only a piece of string, some dirt, and a tube sock? Well...as long as the dirt contains some refined U-235, I suppose it's possible, yeah.
____________________ http://www.goldwingdocs.com Read my illustrated How To guides! |
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| Posted: Tue Sep 29th, 2009 07:15 pm | 17th Post |
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hi raymond was reading your recommend on the 7807 7volt regulator where can i buy 1 in the us? thx gumby
____________________ thx gumby |
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| Posted: Tue Sep 29th, 2009 11:45 pm | 18th Post |
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I have a few left, and I sell them for $3 with free first class shipping. I am going to build a few already made regulators sometime soon however.
____________________ 1983 GL1100 Interstate 1983 GL1100 Aspencade 1997 GL1500 SE |
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| Posted: Tue Nov 10th, 2009 03:56 pm | 19th Post |
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Interesting , when you stop learning , your brain dead. I saved the drawings, thanks.
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| Posted: Tue Feb 2nd, 2010 01:05 am | 20th Post |
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hey guys, i know this is m first post, so a big hello to you all, ive found this site to be very interesting and usefull!1 anyways if i go purchase a 7807 regulator, can i just wire it in with the vin as 12 v then ground then vout would be the 7 volts i require? seems so simple and way cheaper than purchasing the honda one, or even building a circuit on a board.
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