| Author | Message | ||
| Jim Wilkerson (Wagwar)
Registered Member Username: Wagwar Post Number: 168 Registered: 12-2009 Posted From: 70.240.148.37 Rating: N/A |
Hi all, On my DD 6V92T in an MCI MC9, I've got the standard Delco 50DN alternator. I'm installing a tachometer. Which post on the alternator will give me the Stator "S" signal? R1 or F1 or ? I'm replacing all of my toggle switch lamps and dash gauge lamps with LED's. Is there a dimmer/rheostat that works with LED's? Thanks! | ||
| Luvrbus (Luvrbus)
Registered Member Username: Luvrbus Post Number: 1217 Registered: 8-2006 Posted From: 74.33.48.167 Rating: N/A |
The R terminal on a 50D that is a relay terminal (Message edited by luvrbus on August 01, 2011) (Message edited by luvrbus on August 01, 2011) | ||
| Sean Welsh (Sean)
Registered Member Username: Sean Post Number: 1268 Registered: 1-2003 Posted From: 67.142.130.24  Rating: N/A |
As Clifford says, you want the R terminal for the tach. LED's can not be dimmed with a rheostat. They are either "off" or "on", with the brightness changing very little through the operating range of the LED. They will get bright if you over-drive them, but then they will "burn out" shortly thereafter. There are LED dimming systems. These are electronic, and they work by pulsing the LEDs on and off so rapidly that your eye can not detect it. The "brightness" is controlled by the ratio of on time to off time. Many companies that sell LED lighting systems can sell you the electronic dimming module. -Sean http://OurOdyssey.Blogspot.com | ||
| marvin pack (Gomer)
Registered Member Username: Gomer Post Number: 1502 Registered: 3-2007 Posted From: 76.4.118.199  Rating: N/A |
Sean I experimented with some led's and for the meaness I bought some resistors at the R.S. assorted sizes and wattages and started hooking them up and could get what brightness and colors I wanted. LED's come with so many different voltages you must be careful not to blow it out first LOL did several that way. Gomer | ||
| Jack Fids (Jack_fids)
Registered Member Username: Jack_fids Post Number: 853 Registered: 1-2009 Posted From: 72.211.145.15  Rating: N/A |
HOLD ON THAR BABBA LOUIE...! L.E.D.'s are just like regular incancesdents in ONE REGARD The are made to give off a specific amount of light... you want BRIGHT? then look for 2000mcd units you want DIM then look for 100 mcd units If you know item one about LED's you'd know that first..... & foremost! Dimmers... sometimes I swear there are a bunch of them lurking around here. (Message edited by Jack_fids on August 01, 2011) | ||
| Sean Welsh (Sean)
Registered Member Username: Sean Post Number: 1269 Registered: 1-2003 Posted From: 67.142.130.24 Rating: N/A |
Yes, you can choose LEDs to get whatever brightness and color you want -- but if you want to be able to adjust the brightness, the way a dashboard rheostat does for incandescent lights, you need an electronic control. If you are adjusting LED brightness using just a potentiometer and can see any really appreciable result, I can guarantee that you are overdriving the LEDs and it is only a matter of time before they blow. FWIW. BTW, I did a feature article for Bus Conversions Magazine back in the January 2011 issue on converting dashboard lighting to LED. In it I discuss computing the current-limiting resistors, and scuffing the lenses to diffuse the light. If there is enough interest I can re-post it on my blog (my contract with the magazine gives them exclusive rights only for six months). -Sean http://OurOdyssey.BlogSpot.com (Message edited by Sean on August 01, 2011) | ||
| marvin pack (Gomer)
Registered Member Username: Gomer Post Number: 1503 Registered: 3-2007 Posted From: 76.4.118.199 Rating: N/A |
SEAN OVERDUE!! Should be posted HERE FIRST!! Ya be a holdin out on us HUMMM!!!!!! gomer | ||
| Jack Fids (Jack_fids)
Registered Member Username: Jack_fids Post Number: 855 Registered: 1-2009 Posted From: 72.211.145.15 Rating: N/A |
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| Jim Sanders (Sandy)
Registered Member Username: Sandy Post Number: 88 Registered: 1-2011 Posted From: 69.199.96.250  Rating: N/A |
Not to get out Of the thread BUT Jack if you had a brain you would take it out and play with it. I do like your posts LOL JIM | ||
| Cullen Newsom (Cullennewsom)
Registered Member Username: Cullennewsom Post Number: 180 Registered: 2-2009 Posted From: 216.230.236.42  Rating: N/A |
To make a long story short: An LED's brightness is proportional to the current passing through it. LEDs have a maximum current rating, for indicators I'd suggest something in the 10mA range (0.01 Amp). For a simple (single) indicator panel type LED one may use a potentiometer of the appropriate rating. You shouldn't try to power a group of LEDs connected in parallel, unless you're willing to tolerate finicky behavior and lots of trial end error since they are never in practice perfectly matched. For example, at low settings, differences in brightness will be particularly noticeable. There are the (mostly) the PWM drivers Sean mentioned, although linear type are not uncommon. Now to make a long story long: There are some tricks to LED dimming for specialized applications such as high-brightness, color reproduction, displays, etc. Fortunately there are lots of ready-made electronic modules that aren't too expensive. For your application Jim I would suggest one of these modules and a potentiometer to set the brightness. This would work if you don't mind connecting all LEDs in series, and thus having them all the same brightness. I'd be happy to help you choose appropriate parts if you like since the list of possible parts is long and complicated. I suspect there may also be an off-the-shelf product for you, but I don't know what it is. My email is my forum name @gmail.com or, If you want to go it alone, try: Mouser, Digikey, Allied Electronics, etc. | ||
| Cullen Newsom (Cullennewsom)
Registered Member Username: Cullennewsom Post Number: 182 Registered: 2-2009 Posted From: 216.230.236.42 Rating: N/A |
Superbright may have something that will work for you. http://www.superbrightleds.com/cgi-bin/store/index.cgi?action=DispPage&Page2Disp=%2Fhobby. htm | ||
| Jim Wilkerson (Wagwar)
Registered Member Username: Wagwar Post Number: 169 Registered: 12-2009 Posted From: 70.240.148.37 Rating: N/A |
Hi and Thanks to all who responded. I found LED's that will plug directly into the existing ba9s mini sockets, I just can't find a dimmer to work with them. I'll contact cullennewsom via email. If anyone has a suggestion, here are the bulbs I was hoping to use: EIKO PN: 757W LED Allied Electronics: PN: 244-1045 Regards | ||
| George M. Todd (George_todd)
Registered Member Username: George_todd Post Number: 1271 Registered: 8-2006 Posted From: 99.37.28.23 Rating: |
Looks like Jack figured out what Clints been doing too much of! | ||
| Sean Welsh (Sean)
Registered Member Username: Sean Post Number: 1271 Registered: 1-2003 Posted From: 67.142.130.49 Rating: N/A |
This one should work: http://www.ledssuperbright.com/led-dimmer-switch-12v-p-123 -Sean | ||
| Jack Fids (Jack_fids)
Registered Member Username: Jack_fids Post Number: 859 Registered: 1-2009 Posted From: 72.211.145.15 Rating: |
GEORGE... Did the neon purple "Palm Mohawk" give it away or was it the smell of too much Vitalis...? ;) | ||
| George M. Todd (George_todd)
Registered Member Username: George_todd Post Number: 1272 Registered: 8-2006 Posted From: 99.37.28.23 Rating: N/A |
Jack, Actually I think they used to say that you would go blind from excessive monkey spanking, right? I figured that must be why we never get a post that's spelled right or has even one complete sentence! | ||
| Jack Fids (Jack_fids)
Registered Member Username: Jack_fids Post Number: 860 Registered: 1-2009 Posted From: 72.211.145.15 Rating: |
1-Your right Geo. I heard it raised hair on your palm too, hence the Vitalis ref. 2- I'm half blind before I drink, which is why I don't ! 3- I'm jus thnfl that we dnt 1/2 2 dl wth text talk alang wid the masspillngs & the incomplet . Bcuz THAT wood mke it Ccornfuzin....eh? 4- My solution is that we all write in invisible ink ...! | ||
| niles steckbauer (Niles500)
Registered Member Username: Niles500 Post Number: 1003 Registered: 11-2004 Posted From: 173.78.40.113 Rating: N/A |
game, set .... match | ||
| Jim Sanders (Sandy)
Registered Member Username: Sandy Post Number: 91 Registered: 1-2011 Posted From: 69.199.96.250 Rating: N/A |
Jack I like the boat on your posts!!!!!!!!Tell us more about it... Owned a 52ft. for 16 yrs. Jim | ||
| Tom Christman (Tchristman)
Registered Member Username: Tchristman Post Number: 324 Registered: 1-2006 Posted From: 66.218.33.156 Rating: N/A |
LED dimmers work by turning the light off and on quickly. Most cannot see that-I can-so it bugs me. Halogens take way more power, but then you can use a standard dimmer switch on them. LED's running off 120vac will flicker also. Run LED's only on dc and they will glow continuously with no flickering. Good Luck, TomC | ||
| Jack Fids (Jack_fids)
Registered Member Username: Jack_fids Post Number: 862 Registered: 1-2009 Posted From: 72.211.145.15 Rating: N/A |
Jim... YOU have MAIL..! and I expect some in return... enjoy! |
