LED bulbs with 200mA

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Old 04-27-14, 11:57 AM
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LED bulbs with 200mA

Hi Everyone...
Im a noob here so please guide me if I am not following any rules.

Anyways, I have a spare 12vdc, 200mA power adapter that works.
What I want to do is make a couple of lamps with LED bulbs.

I have done some "electrical work" before.
The questions I have are...

a. What specification LED bulbs can I use to make a lamp with 2 bulbs
b. Where can I find those bulbs?

thanks in advance
Regards
J
 
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Old 04-27-14, 12:10 PM
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Welcome to the forums!

LED's alone run off 3vdc. If you are using 12vdc for the power supply you will need to add a resister, or use a assembly of LED's that are designed to use 12 vdc for the supply power, such as an LED strip.

If you are asking about a store bought LED "bulb" they are run off 120 volts AC and have internal wiring to change it to DC volts.
 
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Old 04-27-14, 01:00 PM
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There are many LED bulbs on the market, I recently chased down a pair for my tractor headlights and they run directly off of 12 vdc. But, if you want to wire your own and use just light emitting devices (just the diodes) then, as TI stated you will need some other components to power them properly. How innovative did you intend to get?

Bud
 
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Old 04-27-14, 02:01 PM
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Depending on the application, it will probably be cheaper and brighter to use off-the-shelf module that are already rated for 12v. They are all over ebay and amazon for a buck or less apiece.
 
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Old 04-27-14, 05:54 PM
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OK thanks guys. All I want to do is create a lamp with 2 LEDs. I am not looking forward to making this complex and you are making me think. (which is good)

@jerseyMatt where can I find this "cheaper and brighter to use off-the-shelf module" and what is it called?

OR

@tolyn - if I used "use a assembly of LED's" how do I get rid of all the other LEDs and just use 2?

@PMBud9051 - I do not really intend to spend too much time on this learning. Just because I have too much going on.

Now that things are clearer, I think I really care more about the 2 lamps (this is for my mom's shrine). I can go buy another adapter or use 1 from the many old existing ones I have. So the new question would be...

a. How can I create 2 LED lamps?
b. What power adapter would I use and which LED bulbs should I use with it
c. Where can I find the LEDs?
 
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Old 04-27-14, 07:26 PM
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They're called "T10" or "194". They are standard automotive replacements. Here is where I just bought a whole bunch for a theater application.. Amazon.com: Jtech 10x 194 168 2825 T10 5-SMD White LED Car Lights Bulb: Automotive. They're under $10 shipped for ten pieces. You can get sockets for them at any auto parts store or on ebay (here's ten of them for $7: 10 Pcs Heavy Duty T10 168 194 2825 Wiring Harness Sockets Pre Wired | eBay), or you can simply solder wires to the leads. They only draw about 40mA apiece, so you can use the 200mA adapter to run up to five of them.
 
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Old 04-28-14, 05:10 PM
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Here is an example I have used of a two LED light. It runs off single 3 volt button battery.

Robot Check
 
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Old 05-06-14, 07:00 AM
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Hi, i had similar issue with those lamps, i ended up getting a new CREE version of T5 wedge from [Link removed.] they sell them for like $20 for 10 lamps, very good quality lamps, been using them for over 5 month now without any issues.
 
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