Hey Andy1845c, I like it ! It looks good. How bright is it out side at night? Just curious?
Hey Sceadwian, I got some 150ohms today at work. turns out our repair shop had some that haven't been used. A surplus of all kinds, and ranges. Mine are Brown-Green-Brown-Gold-Yellow. I'm can use a multimeter with no problem. have three. My best is a Fluke. Use to be a ham years ago. Had to build my first set. If that says any thing! I do have a question for you now. I found a guy, who has a formula posted about what resistor to use. It is the following:
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Here is the formula. You will need to know what drive current the leds will require(20mA is a safe bet usually).
R(Ohms)= (Vin-Vforward) / Current in Amps
for for an LED with a forward voltage of say 2.2 Volts and a drive current of 20mA running of 12 Volts it would be:
R= (12-2.2) / 0.02
R= 9.8 / 0.02
R= 490 Ohms
Also had this:
so for 5 20ma LEDs each with a forward voltage of 2.0 Volts it would be.
R= (Vin - V(total)forward) / Current
R= (12-(5*2.0)) / 0.02
R= (12-10) / 0.02
R= 2 / 0.02
R= 100 Ohms
He was explaining a LED problem to some guy on a car. The guy was wanting to put in LEDs in the third eye brake light, on a spoiler.
Using his first formula I came up with 425 ohms,for one. On his second one using the three. I came up with 75 ohms, for the three you said use. Am I missing something with his formula? Like I said curious. I am going with 150 ohm. I'm not doubting you what so ever. Like I said I've haven't worked with LED's before !!!!!
I just curious were he got this? I was bored this morning about 3 am,when I found it.
Thanks For All Input !!!!