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More from marcleonhardt
Modified power supply too
Category Photography / All
Species Unspecified / Any
Size 1280 x 960px
File Size 229.3 kB
I know it's a little late, but you don't have to use one resistor for every three LEDs. You could put sets in parallel with each other and calculate out the needed value for the resistor (or cheat and use a potentiometer and a multimeter to fine-tune the current to come up with the right value resistor). Doing that, you'll just be limited by the resistor's wattage limit.
Of course, doing it your way ensures that a LED blowing doesn't affect the rest of the circuit. :)
Oooh, sorry: I mean "That's a really yiffy picture! *fap, fap, fap*"
Of course, doing it your way ensures that a LED blowing doesn't affect the rest of the circuit. :)
Oooh, sorry: I mean "That's a really yiffy picture! *fap, fap, fap*"
Beat me to it, I did a similar thing a few years ago when rewiring the lights on the family Christmas manger. This was I believe the year before the LED Christmas lights came out, so it was 'modern' mini lights to replace the older mini lights. After determining the average resistance of one bulb and the average current limit before the bulb acts like a fuse, I worked out the total resistance of the loop, determined the maximum current I could draw at 120V, and added a current limiting resister in the power cord so the system would draw at most 90 percent of the blowout current.
With LEDs it's the same thing, except you use the forward bias resistance, and you can select the loop size for a good trade-off between the number of resistors needed and the number of LEDs that will go out when one goes bad.
With LEDs it's the same thing, except you use the forward bias resistance, and you can select the loop size for a good trade-off between the number of resistors needed and the number of LEDs that will go out when one goes bad.
For some reason I cannot find any soldering irons here except cheap ones at walmart or radio shack, and they never seem to mention the actual wattage used. That and none of the ones I find ever seem to have a variety of tips for them. I've had soldering irons before, but unfortunately any extra tips I do find won't fit that model.
The radio shack in the city I used to live in must have been cheap then. Because it didn't have anything like it. And I would like to be able to find replacement soldering tips (as well as variety that work for a model I get). I've seen some soldering jobs on websites that say a chisel tip works well for soldering, but the tip yours shows is a very fine point (and most soldering guns don't come with such a fine tip as that.
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