WOW!! I think it might be easier if I just build a new LED Rod with 5 LED powered by 5.5 volts. LED's are 3volt 20ma.Some of the following should do what you want
MC34063
LM2585
MAX253
but I would change the leds to a lower voltage or get a new power supply
yup thats how its done.I see these LED calculators that tell me to connect a single LED to one resistor like for output 12 I have 10 LED's and each is connected to a 500-550 ohm resistor. I just wanted to know if there is a way of connecting all the led's "neg pos neg" and use just one resistor at the end or at least 5 LED's?
Oh I'm not sure of the part number I bought them on ebay and they came as a pack of 50 in a bag, no numbers or nothing. They are blue clear case and pretty bright hahaWhat is the voltage drop or part number of the LEDs you want to use?
No the resistors were not included, I have that LED calculator but I was hoping of making a LED with the least amount of resistors I can use like for example 6 LED's to one resistor. Is that possible?something similar??
they came with resistors for 12v set up
here is a handy link to calculating resistors
LED Resistor Calculator
Do an experiment. Assume that the forward drop across a single led is 2V. Calculate out a resistor to get 20mA starting from your car battery. Hook it up. Using a voltmeter to measure the actual voltage across the single LED.No the resistors were not included, I have that LED calculator but I was hoping of making a LED with the least amount of resistors I can use like for example 6 LED's to one resistor. Is that possible?