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Led soldering help Answered

I wanna solder 10 leds parallel and but it in light bulb like in https://www.instructables.com/id/A-Steampunk-lamp-with-muliti-color-LEDs/step2/Preparing-the-bulb/

I don't have aluminium tube. I have only heat shrinking tubes.
I found serial scheme http://img.neons.org/archives/LED3rdBrake/image23.gif.
I'm thinking to use battery - as ground.
I have 100k and 10k resistor. 1m think this is resistor. I dont wanna mess things up or burn someting down.


Maybe my steampunk lamp project pictures helps.

Steampunk lamp project.jpg

I Was thinking to use battery negative as ground.

Not sure why your recent post doesn't have a reply option on it so i'll reply here. Just an FYI its best to use the reply buton when you want to reply to someones post. This send an notification to the person so they know you have responded.

Anyway... you are going to use a 3V battery pack with 10 LEDs. Like i said earlier use the LED cacl to figure out what resistors you need. Each LED will need a resistor on it to limit the amount of current going to the LEDs and preventing them from burning out. But it all depends on how much voltage the LEDs can take. So stick with the calc and you'll do just fine.

In a basic DC circuit the negative terminal of the battery is always ground.

Just solder them together. It will be a better hold then crimping a metal tube onto the leads. This project requires a battery to run it, so i don't know what you mean when you say your thinking of using a battery as ground. Depending on how many LEDs you plan to use and what kind of battery you will dictate how you will solder the LEDs together and what, if any, resistors will be needed.

Here is an LED calculator. Input what your source voltage is, how much forward voltage the LEDs need, how much current the LEDs draw and how many LEDs you want to use. Then the calc will give you a schematic on how to connect the LEDs and what resistors to use. Refer to the LED packaging for the forward voltage and the current. 

+1. Use the calculator if you don't know what the numbers mean.