Want to light up LEDs without all that resistor math? Just cheat, and use a 1k resistor on everything. It works fine for most LED types on most battery voltages.
By Julian
Youtuber, shed dweller, solar charge controller aficionado
Good morning all…
Youtuber, shed dweller, solar charge controller aficionado
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and if you want to connect a led to 240v?
Can I use a single 1k resistor on a series of 12 LEDs in a 5v?
Lower the voltage so that you don't need resistor. It is way more efficient too
I feel that I am back to high school by watching this video! Great teacher you are!
This is a good video
That was useful to know…thanks
Resistors in how to light up leds without resistors….must have miss something…
To slate Julian for providing a simple solution for newbies is rediculous. Just because you find Ohms law simple, does not mean that everybody in the world has even heard of it. I have no problem doing the math, but as I do not play with electronics often, I can not remember the order of the equation, but so long as I see it written down then it's easy. I just look in my notebook to see my ohms law circle and then away I go. Its not about being lazy, its about getting total newbies interested enough by having small successes, so that they remain and grow in the hobby. Its also useful for those with poor memory recall like me. Am I lazy? Am I thick? no, but I do have memory issues. Stop being so arrogant and ignorant and give credit where credit is due. I notice those complainers have not produced a better video for newbies on the subject.
Well thank you i learned something today 🙂
resistor depends on the supplied voltage at 9v 1k might work but at 3.7v or 5v their would be very weak light…for that use 220ohm resistor, perfect
what about 66k resistor
For simple indicator leds 1k is more than enough. At 3.3V supply red, blue, orange and white are bright enough to see them indoors, only green ones need more juice. I tested some of my leds and red leds take about 1.5mA and are bright, and blue are even brighter and take less than 1mA, both at 3.3v. For high power leds and higher brightness that won't work. Simply leds don't need their 20mA to light, that value is their maximum continuous rating.
Brown Black Red 1r resistor? 1000 1K White, Green, Blue, Ultra Violet 1 Watt high power. Thank for the LED Math