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ohms law

Akans

how did i use ohms low to choose a resistor for my circuit when the current of the voltage is unknown. like i have a 10 volt resistor and i need 5volt out from the 10volt what will i do to get the current so that i can use it to divide the voltage to get my resistor for the circuit as ohms low states

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  • 0

    You should get a basic multimeter, and a small pack of resistors, and just try it. Take measurements, observe if anything gets hot, and compare with your expectations. What's the worst that will happen? Combined with some reading, I guarantee you'll learn more that way than the mistakes you make.

    Ohm's law is fundamental, and will be covered in many books, but there are excellent recommendations here:

     I Want to Do Electronics!  Where do I start?

  • 0 in reply to shabaz

    I decided to eat own dogfood and check out the link.. The Learning Circuit is excellent, part 5 discusses the LED example.

     Ohm's Law with Breadboard Circuits -- The Learning Circuit 05 

    Note there is a typo on one of the images part-way through the video, where the value should be 20mA, but the text shows 2mA. Aside from that I think it is all fine!

    The Learning Circuit was excellent, and there are 98 episodes! I wish element14 would bring it back with the same host (Karen) for a Learning Circuit series 2. Anyway, the videos there will help a lot I think (but also supplement your learning with a book or two, since it's good to have a couple of sources, to solidify your knowledge by reading things re-stated in different ways).

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  • 0 in reply to shabaz

    I decided to eat own dogfood and check out the link.. The Learning Circuit is excellent, part 5 discusses the LED example.

     Ohm's Law with Breadboard Circuits -- The Learning Circuit 05 

    Note there is a typo on one of the images part-way through the video, where the value should be 20mA, but the text shows 2mA. Aside from that I think it is all fine!

    The Learning Circuit was excellent, and there are 98 episodes! I wish element14 would bring it back with the same host (Karen) for a Learning Circuit series 2. Anyway, the videos there will help a lot I think (but also supplement your learning with a book or two, since it's good to have a couple of sources, to solidify your knowledge by reading things re-stated in different ways).

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