brian_bp wrote:Do you think the LED leads or resistor will get warm enough in use to cause any concern with the hot glue material melting? I'd guess not, I'm just wondering if this had been considered.
jss06 wrote:brian_bp wrote:Do you think the LED leads or resistor will get warm enough in use to cause any concern with the hot glue material melting? I'd guess not, I'm just wondering if this had been considered.
The heat produced will not even be close to the melting temp of the hot glue.
That is some great work. Makes me wish I had a lathe.
donmaloney wrote:I had thought about the heating of glue, but I did not imagine the lights would get too hot. (Make sure you are done soldering before using the glue, though!!!)
The reason I used the hot glue is in case a bulb burned out which is rare, but not unheard of. I figured it would be easier to pull off the glue, replace the bulb, and glue it up again. I would hate to have an LED burn out and have to rebuild everything.
bdosborn wrote:Don,
I've been playing around with LEDs/regulators and I've been meaning to post something about it so thanks for the nudge. The LM2940 is rated for an output of 1 amp, so you could probably use just one regulator for all your lights. That being said, I'd split the lights across two regulators so that if one fails, you're not in the dark. I've been burning in LEDs on the LM2940 and haven't had any failures with a 48 hour run but it been pretty cool out in the garage. Heat is the enemy for both the regulator and the LEDs. I heat-sinked my regulator by bolting it to a 2" length of 3/4" aluminum angle I had leftover from the teardrop build. The regulator has been cool to the touch after running with a load of 0.3A. The output has been exactly 12V with an input anywhere between 12.7V and 14.3V. The regulator has also survived shorting the output and hooking it up with the polarity reversed (Doh!) . All-in-all its a nifty regulator, just don't forget to add the 22uF capacitor across the output.
Bruce
bdosborn wrote:Mike,
Yeah, I think it will pass through when the voltage drops below 12.5V. I've run my battery down to around 12.2V and the regulator worked just fine.
Bruce
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