Bump.
I want to add another red LED to my fixtures, but I can't remember which fit the incandescent contacts: 1156 or 1157 type connectors? Anyone know?
These are 1156 bulbs. 1157 are dual filament I believe.
I have tried the 36 LED lights from V-LEDs as well as the hong kong ebay seller. One of the hong kong specials is already flaking out. None of the 36 LED boards I've received have any sort of active current regulation. They are basically groups of 3 LED's in series with a resistor. This means that at higher voltages (like when the battery charger is on), the LED's could be overdriven.
What I've been playing with is a single super bright LED emitter driven by a constant current driver circuit. This is just about as bright as an incandescent, but uses about 1/4 the power. Unfortunately, I have yet to find a plug and play solution, so I rolled my own. The LED emitter should be thermally glued to some sort of heat sink or heat spreader as it is dissipating up to 3W or so.
I got the LED's
here and the driver board
here. The driver board is actually a 700ma constant current source, not 350ma shown on the site. I broke open an 1156 bulb and soldered wires from it to the driver board. There are two wires that go from the driver board to the LED board. I had some small flat heat sinks laying around that I attached the LED's to, and used double sided tape to fix the LED assembly in the light fixture. It's a bit crude. I plan to order another batch, so I"ll try to remember the camera next time! Since these come from Hong Kong, they take a couple of weeks to get.
*edit* I should point out that I"m no einstein and didn't figure this all out by myself. I got a lot of this from
this guy's website.
-steve